POLLICIPES POLYMERUS. 307 



3. POLLICIPES POLYMERUS. PI. VII, fig. 2. 



Pollicipes polymektjs.(!) G. B. Sowerby. Proc. Zool. Soc, 1833, 



p. 74. 

 — Mortoni (!) Conrad. Journal Acad. Nat. Sci. Phila- 

 delphia, vol. vii, p. 261, PI. xx, 

 fig. 12, 1837. 



P. capitulo, valvarum duobus, tribus, aut pluribus sub- 

 rostro verticillis instructs : valvis sub-fuscis : lateribus a 

 supremo ad infimum gradatim quoad magnitudinem positis : 

 carina margine basalt (introrsunt spectanti) ad medium 

 ewcavato: pedunculi sauamarum verticillis densis, sym- 

 metrice dispositis. 



Capitulum with two, three, or more whorls of valves 

 under the rostrum : valves brownish : latera regularly 

 graduated in size from the uppermost to the lowest : 

 carina with the basal margin, (viewed internally,) hollowed 

 out in the middle : scales of the peduncle symmetrically 

 arranged in close whorls. 



Maxillae with three tufts of fine bristles, separated by 

 larger spines; caudal appendages uniarticulate; filamentary 

 appendages attached to the prosoma. 



Upper California, St. Diego and Barbara, 32° to 35° N., according to 

 Conrad ; Mus. Cuming : Low Archipelago, Pacific Ocean ; Mus. Coll. of 

 Surgeons : Southern Pacific Ocean, collected during the Antarctic Expedi- 

 tion, Mus. Brit. 



Capitulum, but little compressed, broad, with the scuta 

 and terga placed in a more oblique direction, with respect 

 to the peduncle, than is usual, so that the line of orifice 

 forms an unusually small angle with the basal margin 

 of the capitulum. The capitulum is composed of several 

 whorls of valves, which gradually decrease in size from 

 above downwards. In a medium-sized specimen there 

 were four whorls under the rostrum ; in the lowest of these 

 whorls, there were between eighty and ninety valves, and 

 in the whole capitulum from one hundred and seventy, to 

 one hundred and eighty. The valves in the lower whorls 



