ISOPODA. 63 



The maxillae hardly present any distinctive features. 



The maxilliped is normal in character, it is short and thickened towards its straight 

 inner border, and on this are two papilliform teeth ; distally it carries a few spines. 

 The palp is five-jointed, the first three progressively increase in length, the others 

 decrease ; the three distal bear rather long setae internally. 



The pereiopoda are not long, the first is short and stout, adapted as a prehensile 

 organ. The basis is the longest joint, the ischium is about two-thirds its length and 

 enlarged on its inner margin. The merus is half the length of the ischium and much 

 enlarged dorsally and carries two setae ; the carpus is a large joint, slightly swollen 

 ventrally and provided with spines and setae ; the propodus is shorter, stout and setose 

 ventrally ; the dactylus shorter still, with a strong accessory to the terminal claw and a 

 curved seta near its extremity. 



The remainder are distinctly ambulatory in function and are much more slender, 

 every joint with the exception of the merus being approximately cylindrical ; the merus 

 is but slightly enlarged distally. There are but few small setae scattered on these 

 appendages, which slightly increase in size from the first pair to the last. 



The first pair of pleopods act as an operculum to the remainder. 



A number of specimens were taken from dredge material inside the 25-fathom 

 line. A few individuals at a time were found during the whole of our stay. 



ANTIAS. 

 Kiehardson (12), pp. 16-17. 



This genus is another of those instituted by Miss Richardson for the Isopods 

 brought back from the Antarctic by the French Expedition under Dr. Charcot. The 

 species described below is identical with that found on the western side of Graham's 

 Land and was abundant in our Winter Quarters. 



ANTIAS CHARCOTI. 

 (Plate IX., fig. 1.) 



Antias clutrcoti Richardson (12), pp. 17-19. 

 Specific characters : 



Cephalosome with a broad rostrum divided into two rounded setose lobes. A curved spur in 

 front of ocular peduncle. 



Both meso- and motasome fringed with long spinous setae. A transverse row of fine setae on four 

 segments of the mesosome. 



Uropoda large, biramous. Exopodite straight, endopodite curved. 



The cephalosome is broad, but even including the ocular peduncles it is not quite 

 so wide as the first segment of the mesosome. The anterior part is produced into two 

 stout rounded tubercles, forming a broad and bifid rostrum, each part being well 



