302 POLLICIPES CORNUCOPIA. 



Mouth, not placed very far from the adductor muscle. 



Labrum, highly bullate, equalling, in its longitudinal 

 diameter, the rest of the mouth ; upper part square, not 

 overhanging the lower part ; there are some small teeth 

 on the crest. 



Palpi, oval, outer and inner margins nearly alike, 

 thickly clothed with spines. 



Mandibles, with three very strong, yellow teeth ; inferior 

 point broad, coarsely pectinated. In one specimen, on 

 one side, the third tooth was represented by two smaller 

 teeth. 



The Maxilla bear three conspicuous tufts of fine 

 bristles, separated by larger spines ; the first tuft is placed 

 close to the two, upper, large, but unequally-sized spines; 

 the second tuft is placed in the middle, and the third at 

 the inferior angle. The two latter tufts stand on pro- 

 minences ; between the two upper tufts there are three 

 pair, and between the two lower tufts four or more pair 

 of rather strong spines : (see the figure, 13, PL X, in the 

 allied P. poly merits .) 



Outer Maxilla, with the inner edge divided in the 

 middle by a conspicuous notch, and with the bristles 

 above and below short, making two equal combs. On 

 the exterior surface, the bristles are longer and more 

 spread out. Olfactory orifices prominent, protected by 

 a punctured swelling between the bases of the first pair 

 of cirri. 



Cirri, short and rather thick ; the first pair is not far 

 removed from the second. The segments of the three 

 posterior pair are somewhat protuberant, bearing six pair 

 of short, strong spines, graduated in length, between 

 which there is a very thick, longitudinal brush of short, 

 fine, straight bristles, of which the lower ones are the 

 longest ; some thick, minute spines arise from the upper 

 lateral edges of the segments. The spines in the dorsal 

 tufts are short, much crowded, and of nearly equal 

 length; see figure, 27, PL X, in the allied P. polymerus. 

 In a specimen in which the sixth cirrus had seventeen 



