ISOPODA. 7 1 



Of the second anteuiiae ouly small portions remain. These arise close to tlic 

 external border of the cephalon, and only four joints of the peduncles exist ; the first 

 three are very short and stout, armed externally with a stout spine ; the third has a 

 very iililiquc distal margin and is provided internally with several strong setae; the 

 fourth joint is also very small and mucli more slender than the others. 



The animal has not been dissected at all, and from what can be seen of the maxillipeds 

 in situ they are of the usual type and have a comparatively very large cpignath, 

 broad and ending in a blunt point. The paljj is five-jointed, the first joint is siiort and 

 broad ; the second nearly three times as long ; the third half as long as the preceding 

 but narrower, the two terminals are subequal in length, rather short and setose. 



The pereiopoda may be described as rather long, but not disproportionately so, 

 and very slender ; most of tlieni have been more or less severely injured. The first pair 

 are complete and are aml)ulatory ; they exhibit a long slender basis, an ischium rather 

 more than half the length, a short and dorsSlly-expanded merus, a carpus as long as 

 the ischium, a propodus almost equally long, and a dactylus f)ne-tliird the length. 

 Ventrally the carpus and propodus bear scattered seta;. I have not been able to 

 distinguish any accessory claw. The other pereiopoda are very similar as far as 

 can be made out, but the proportions of the joints are rather different, and there is 

 no accessory claw. They are too fragmentary to permit of a definite statement as to 

 the adapt^ition of the posterior ones for swimming as is characteristic of the Muniiopftidfe. 



The fir.st pleopoda are strongly developed as an operculum to the remainder, and 

 the inner border of that of the right side is armed with four or five stout teeth. 



Only a single specimen of this species was extracted from tlie dredge material 

 shortly after arrival at Winter Quarters. Inside the 20-fathom line, February 28, 1902. 



I have to express my sincere thanks to ]\Iessrs. West, Newman & Co. for the 

 trouble and care they have taken in the preparation of the plates, also to Mr. F. S. 

 Murray for other assistance. 



[p.T.o. 



