[37] ALBATKOSS EXPLORATIOiTS. 539 



Si/napta brychia Verrill, sp. nov. 



B. range, 938 fathoms, station 2111, off Cape Hatteras, 1883. 



A large species, with a strong, thick, opaque purplish brown skin, as 

 preserved in alcohol. The strong longitudinal muscles are lighter colored. 

 The skin contains rather large, scattered, ovate plates, easily visible to 

 the naked eye. They are jjerforated by numerous (seventy to eighty 

 or more) small rounded openings, and have a central eminence, com- 

 posed of several slender processes. Each plate bears a large anchor, 

 its length equal to that of the plate. The shaft of the anchor is round 

 and smooth, narrowed next the expanded end, which is surmounted by 

 several rough or lacerate denticles; the flukes are long, sharp, smooth, 

 strongly recurved, more than a third as long as the shaft. ]\Iany of the 

 anchors project from the skin, and are large enough to be visible to the 

 naked eye. Length, in alcohol, 160'^'"; diameter, 10™°\ 



ECHIKOIDEA. 



Pourtalesia Jeffreysii W. Thomson. 

 B. range, 843 to 1,555 fathoms, 1883. Not uncommon. 



Aerope rostrata W. Thomson. 

 B. range, 1,395 to 1,608 fathoms, 1883. Local and not common. 



Aceste bellidifera W. Thomson. 

 , B. range, 1,395 to 1,497 fathoms, 1883. Not common. 



Schizaster fragilis (Diiben & Koren) L. Agassiz. 

 B. range, 37J to 321 fathoms (99 to 239 fathoms, 1883). Common; 

 locally abundant. 



Sehizaster Orbygnianus A. Ag. 



Schizaster canaliferus, variety, Verrill, this report for 1882, part x, p. 658. 

 B. range, 65 to 179 fathoms (117 to 179 fathoms, 1883). Not uncom- 

 mon ; local. 

 Brissppsis lyrifera (Forbes) L, Agassiz. 

 B. range, 65 to 1,555 fathoms (938 to 1,555 fathoms, 1883). Common. 



UrecMnus Naresianus A. Ag. 

 B. range, 1,309 fathoms, 1883. Local ; gregarious. 



Eehinaraclmius parma Gray. 

 B. range, 6 to 888 fathoms (35 to 888 fathoms, 1883). Common ; 

 often very abundant in shoal water. 



Phormosoma placenta W. Thomson. 

 B. range, 458 to 1,309 fathoms (499 to 1,309 fathoms, 1883). Com- 

 mon. 



Phormosoma uranus W. Thomson. 

 B. range, S43 to 938 fnthoms, 1883 ; 508 to 1,080 fathoms, 1884. Not 

 coranion ; local and gregarioivs, 



