336 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [630] 



Savin Rock, near New Haven, in sand at low-water mark. 

 This species is, perhaps, not a true Tctrastcmma. It is here only pro 

 visionally referred to that genus. 



MECKELIA ING-ENS Leidy. Plate XIX, figs. 90, 9G. (p. 3-19.) 



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 LURID A 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 fosses 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 mm to 250 mm ; breadth up to 10 nuu 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 margins, the anterior 



part darkest. 



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



mud. 



COSMOCEPHALA ociiRACEA Verrill, sp. nov. Plate XIX, figs. 95, 



(p. 325.) 



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 



