630 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Saviu Eock, near 'New Haveu, in sand at low-water mark. 

 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, 96«. fp. 319.) 



Marine Invertebrate Fauna of Rhode Island and New Jersey, p. 11 (143), 1855. (?) 

 Meckelia Poeohonfas Girard, Proceedings of Academy of Natural Sciences of 

 Pbiladelpliia, 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 Pliiladelpliia, vol. v, p. 243, 1851. 



Great Egg Harbor to Xew 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 Xew Haven and Vineyard Sound. Common in 

 sand at low-water mark. 



Meckelia lurida Verrill, sp. uov. (p. 508.) 



Body long, large, stout, much depressed throughout, and thin poste- 

 riorly, somewhat thickened anteriorly. Head changeable in form, often 

 acute; lateral fossne 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 (I), species undetermined (a), (p. 508.) 

 This is a dark olive-green species, with paler margins, the anterior 



part darkest. 



Off Block Island, in 29 fathoms ; off Gay Head, in 19 fathoms, soft 



mud. 



COSMOCEPIIALA OCHRACEA Verrill, sp. nov. Plate XIX, figs. 95, 95a. 

 (p. 325.) 



Body elongated, moderatel}^ 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 

 tajjering 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 



