POLLICIPES CORiNUCOPlA. 301 



apex is not at all pointed, and bears some minute and 

 thin spines. There is one large spine on the under side 

 of the disc ; and another on the basal segment, on the 

 outside, in the usual position. The ultimate segment is 

 long and thin; it has a notch on the inner side (the 

 segment supposed to be stretched forward), bearing two 

 or three long flexuous spines ; and there are three or four 

 other spines on the summit : altogether there is a close 

 resemblance with the antennas in Scalpellum, excepting 

 that the hoof-like disc is not here pointed. 



Colours. — Valves internally tinted, in parts, grey; 

 peduncle, brown ; corium of sack, purplish-brown, of pe- 

 duncle, rich coppery brown ; cirri, banded dorsally, and 

 with the front surfaces of the segments, purplish-brown. 

 Edge of the orifice of sack, fine crimson red. The speci- 

 men here described had been dried for a few weeks, and 

 was then moistened. 



Dimensions. — The largest specimen which I have seen, 

 in Mr. Cuming's collection, had a capitulum 1 and T \ ths 

 of an inch long ; a fine specimen, from TenerhTe, was t% ths 

 in length. In a specimen with a capitulum Ath of an inch 

 long, and about the same in breadth, there were eighteen 

 valves ; so that, besides the principal valves, five pair of 

 latera, the sub-carina, and sub-rostrum, were already de- 

 veloped, and on the upper part of the peduncle, there 

 were many calcareous scales. 



Filamentary dpjiendages. — The prosoma is well-de- 

 veloped, with thirteen or fourteen pair of short, blunt 

 filaments, placed close together in two longitudinal rows ; 

 those nearest the thorax are the longest; outside this 

 double row, on each side, there is a row of papillae, indi- 

 cating a tendency to the formation of two other rows of 

 filaments. There is a pair of longer filaments, one on each 

 side of the mouth, pointing upwards, and thinly clothed 

 with long spines ; at the bases of the first pair of cirri there 

 is a second pair of filaments, shorter and bearing a few 

 minute spines. The bottom of the sack is studded with 

 small rounded papillae, with roughened summits. 



