Snails, Welks, Conchs
Class Gastropoda (Snails, Whelks, etc.)
M-810 LIMPET , a primitive uni-valve gastropod. The conical shell resembles a coolie
hat. Moves freely over rock or shell as it grazes on algae, but invariably returns to its original location. Has eyes at the base of tentacles and expels gametes through aperture on top of shell. Size: 1-2 cm.
M-820 SLIPPER LIMPET, Crepidula fornicata, other flattened univalve excellent for
embryological studies, demonstrating spiral cleavage. A protanderous hermaphrodite, it often piles up, one individual upon another, when breeding. It possesses a crystalline style and is a ciliary feeder. Size: 2-4 cm.
Large Each $22.00 (4-8cm)
M-850 EAR SNAIL, Sinum maculatum, an unusual gastropod with a small, delicate
shell encased in a huge white slimey foot. Even experienced shell collectors seldom realize that within this hunk of white, porky meat is the delicate ear shell. Size 4-6 cm.
M-851 CROWN CONCH, Melongena corona, is a particularly hardy and attractive
gastropod that is found around oyster reefs and mud flats in West Florida. Its handsome, pointed spiral shell is used extensively in shell craft. Tolerant of low salinities, Melongena is excellent for feeding demonstrations: food is placed in a test tube and the gastropod extends its long, snakelike probocis down to get it. Occasionally it feeds on live oysters. Size: 6-10 cm. Each: $13.75
M870 LEFT HANDED WHELK, Busycon contrarium, is the traditional large whelk used for dissection in invertebrate and general biology courses. Its ribbon of teeth scrapes away at other mollusk tissues, and it is excellent for demonstrating radular movements. Busycon will quickly burrow down into the gravel, emerging to forage at night.
Large over 24 cm: $36.50
M-890 BANDED TULIP SHELL, Fasciolaria hunteria, a small predatory snail that feeds on clams. The highly polished shell has a marbelized pattern of grey, brown, and white with distinct purple-brown spiral bands. Females will lay eggs in an aquarium in vase shaped horny capsules. Male is said to eject water, setting up vibrations, to attract a mate. Size: 5-7 cm.
M-900 COMMON TULIP SHELL, Fasciolaria tulipa, has a larger, less colorful shell than F. hunteria and a bright purple foot. This species is useful for displaying fluke larvae, which can be produced almost 100 percent of the time by cracking the shell and soaking the animal in a dish of seawater. The common tulip feeds on small gastropods. Size: 10-14 cm.
M-901 FLORIDA FIGHTING CONCH, Strombus alatus, despite its name is really a peaceful herbivore that cruises the night bottom. Its huge stalked eyes seem to peer up at you with an alarmed expression. When handled, it may go into a startling defensive behavior thrusting around with its small pointed foot, hence the name. Sporadically available. Size: 8 cm.
M-910 FLORIDA MUREX, Murex pomum, (and other species of Murex) drill into oysters and other bivalves. This is the genus that produced the famous royal purple dye of the ancient Phoenicians. The shell is armoured with spikes. Size: 4 cm.
M-911 MUREX Cabritti
M-912 TURBO CASTANEA OR TOP SNAIL Astria sp., a small, rounded herbivorous snail (Archaeogastropoda), with a beautifully pearly operculum. Found sporadically in turtle grass beds. Often seen scouring the shells of larger whelks and horseshoe crabs. Turbo crawls up the walls of the aquarium, consuming algae like a vacuum cleaner, making pronounced tank clear and visible in a few days. Sporadic. Size: 1-3 cm.
M-920 PIGMY DOG WHELK, Nassarius vibex, small, chemotactic reponse. In a sand aquarium, they remain buried until a piece of fish is dropped in, and within minutes their siphons pop up like small periscopes and they converge on the meat. Nassarius will readily regenerate its tentacles, eyes, frontal lobe, operculum, foot and siphon. It has a long proboscis and moves by ciliary waves on foot. Preyed upon by tulip shells whose trails produce violent evasive action by Nassarius. Size: 1-1.5 cm.
Per 100: $140.00
M-930 OLIVE SHELL, Oliva sayana, has a smooth, elongated and polished shell.
Dwells on sand bottoms just under the surface. However, when a piece of shrimp is dropped in the tank, the snail thrusts its siphon up and emerges, dramatically upheaving the substrate and pouncing on the food. Size: 4-6 cm.
M-940 HORSE CONCH, Pleuroploca gigantia, the largest gastropod in the Gulf of Mexico. It has a pointed shell and a huge orange foot making it a striking demonstration piece. Shell may be encrusted with a variety of worms, barnacles and bryozoans. Does not feed on clams, but feeds on other carnivorous gastropods. Size: up to 60 cm. long (smaller specimens shipped for aquarium) large, over 24 cm.
M-971 PERIWINKLE SNAIL, Littoraria irrorata, adorns salt marshes from New York
to Texas. When the tide rises, they ascend the grass stalks until well above water level. Periwinkles lap up diatoms and filamentous algae, and follow each other’s mucous trails, up and down the stalks.