. 
336 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [630] 
Savin Rock, near New Haven, in sand at low-water mark. 
y) ’ 
This species is, perhaps, not a true Tetrastemma. It is here only pro- 
visionally referred to that genus. 
MECKELIA INGENS Leidy. Plate XIX, figs. 96, 96a. (p. 349.) 
Marine Invertebrate Fauna of Rhode Island and New Jersey, p. 11 (143), 1855. (?) 
Meckelia Pocohontas Girard, Proceedings of Academy of Natural Sciences of 
Philadelphia, vol. vi, p. 366, 1854 
Fort Macon, North Carolina; Great Egg Harbor to New Haven and 
Vineyard Sound. Low-water mark to 8 fathoms. Charleston, South 
Carolina (Girard). 
MECKELIA LACTEA Leidy. (p. 350.) 
Proceedings of Academy of Natural Sciences of Philadelphia, vol. v, p. 243, 1851. 
Great Egg Harbor to. New Haven and Vineyard Sound. Low-water 
mark to 10 fathoms. Perhaps the young of the preceding species. 
MECKELIA ROSEA Leidy. (p. 350.) 
Proceedings Academy Natural Sciences of Philadelphia, vol. v, p. 244, 1851. 
Great Egg Harbor to New Haven and Vineyard Sound. Common in 
sand at low-water mark. 
MECKELIA LURIDA Verrill, sp. nov. (p. 508.) 
Body long, large, stout, much depressed throughout, and thin poste- 
riorly, somewhat thickened anteriorly. Head changeable in form, often 
acute; lateral fossee long. Ventral opening large, elongated. Proboscis 
long, slender, emitted from a terminal pore. In some specimens there was 
a Slender, acute, caudal papilla. Color deep chocolate-brown, with lighter 
margins. Length, 150" to 250™™; breadth up to 10™™ or more. 
Off Gay Head, 19 fathoms, soft mud; off Buzzard’s Bay, 25 fathoms; 
off Block Island, 29 fathoms, sandy mud; Casco Bay, 10 to 68 fathoms. 
CEREBRATULUS (?), species undetermined (a). (p. 508.) 
This is a dark olive-green species, with paler ed the anterior 
part darkest. 
Off Block Isiand, in 29 fathoms; off Gay Head, in 19 fathoms, soft 
mud. 
COSMOCEPHALA OCHRACEA Verrill, sp. nov. Plate XIX, figs. 95, 9oa. 
Oy 
(p. 329.) 
Body elongated, moderately slender, somewhat flattened but thick, 
and with the margins rounded, obtuse at both ends or subacute poste- 
riorly ; broadest and often swollen anteriorly ; gradually and slightly 
tapering posteriorly ; the integument is translucent and the internal 
median organs show quite distinctly ; lateral organs voluminous, ex- 
tending the whole length of the body along each side, and showing 
through as dull yellowish white mottlings. Head continuous with the 
