
MARINE AQUARIA 
what rounded whorls, a moderately elevated spire and blunt apex. Found 
on muddy shores not exposed to the surf, from Maine to Florida. 
Nassa trivittata, (Say), a smaller form, has an ovate-conic % inch 
greenish-white, seven-whorled shell, with the surface marked with lines 
and granulations. The whorls are rounded, suture depressed and apex 
acute. Found at low-water marks along the Atlantic coast generally. 
Buccinum undatum, (Linn.), or Common Whelk, has a heavy ovate- 
conic six-whorled greyish 3 inches shell, marked with coarse revolving 
lines and waved transverse wrinkles. Found from Canada to the Caroli- 
nas and further south. 
Urosalpinx cinereum, (Say), or Oyster Drill, has a long-oval coarse 
and solid five- or six-whorled, ash-colored or reddish-brown, one inch long 
shell with a number of rib-like undulations and revolving lines on the 
convex whorls. ‘The suture is depressed and the beak slightly curved. 
Common along the Middle Atlantic coast and larger in southern waters. 
Fulgur canaliculata, (Say), or Turret Conch, has a 6 to g inches long 
pear-shaped, rather thin, pale faun-colored shell, with about six turreted 
whorls and a deeply impressed channeled suture. It is one of the com- 
mon Conchs of the Atlantic coast, found from Cape Cod to Georgia. 
Fulgur carica, (Linn.), or Spined Conch, has a solid ash-colored six- 
whorled shell, with a series of compressed spines or nodules about the 
larger three whorls. ‘The upper whorls are somewhat depressed and the 
suture shallow and not channeled as in the foregoing. It is less abundant 
but is distributed in the same localities. 
Bivatves. The most common Bivalves of the Middle Atlantic 
States coast are: 
Ensis directus, (Conr.), or Common Razor Clam, has yellowish-green 
scabbard-shaped valves about 5 to 6 inches long and 1 inch broad, with 
rounded, nearly parallel ends. It lives on sandy beaches near low-water 
marks along almost the entire Atlantic coast. 
Mya truncata, (Linn.), or Common Soft-shell Clam, or Gaper, has 
oblong-ovate inequilateral strong, deeply concave 3 inches long valves 
with distinctly marked umbones. The valves are rounded anteriorly and 
truncated posteriorly, dingy white in color with yellowish and brown 
wrinkled epidermis. Generally distributed along the Atlantic coast south 
to South Carolina, and most abundant along the New England coast. 
Mactra solidissima, (Dillw.), or Trough Clam, another soft-shelled 
form, has very large, massive, transversely ovate, sometimes triangular 
414 inches long valves, with the epidermis usually worn or eroded. The 
umbones are usually distinct and the surface slightly folded at the lines of 
growth. This clam is also known as the Beach- or Dipper-clam, and is 
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