312 POLLICIPES POLYMERUS. 



Mandibles with three unusually strong teeth, slightly 

 graduated in size, with the inferior angle very coarsely 

 pectinated ; the lower edges of the main teeth are rough- 

 ened. 



Maxillce, (PL X. fig. 13). Spinose edge about half the 

 length of the mandibles ; the two upper spines are un- 

 usually strong ; close under, and almost hidden by them, 

 there is a tuft of fine spines ; in the middle there is a 

 second similar tuft mounted on a prominence; and at 

 the inferior angle there is a third tuft, also mounted on a 

 rather wider prominence, not quite accurately figured. 

 In the interspaces between these tufts there are three or 

 four pairs of spines of the usual appearance and projecting 

 just beyond the fine tufts ; the upper of the two interspaces 

 is rather narrower, but rather deeper, than the lower in- 

 terspace. Apodeme very long, irregularly shaped, like 

 an S, with a remarkable elbow near its attachment ; apex 

 slightly enlarged, thin and rounded. 



Outer Maxilla. — On the inner margin there is a deep 

 and conspicuous notch, above and beneath which, there is 

 a compact row of serrated bristles ; exteriorly the bristles 

 are rather longer. 



Olfactory Orifices very prominent, pointing obliquely 

 towards each other. 



Cirri. — Posterior cirri moderately long, much curled, 

 with the segments (PI. X, fig. 27) flattened and wide; the 

 anterior surface hemispherically protuberant, supporting 

 six pairs of spines, of which the lower ones approach each 

 other ; between these spines there is a large tuft of very 

 fine spines, of which the central ones are the longest ; there 

 is an upper lateral group of very short strong spines; dorsal 

 tufts composed of short, fine numerous spines. First 

 pair seated close to the second pair, short, having in both 

 rami eight segments, whereas in the same individual the 

 second pair, which is nearly twice as long, had thirteen, 

 and the sixth pair eighteen segments. Rami of the first 

 pair nearly equal in length, with their segments, excepting 

 the two upper ones, thickly paved with bristles, in the 



