Crustacea. 239 



Maiiflilile. Second joint of palp a little stouter, and sparingly 

 setose. 



First maxilla. Very similar. 



Second maxilla. Palp somewhat more conical. 



Maxillipede. Proportions of the joints differ slightly, and may 

 be represented as follows : dactylus, 4 ; propodos, 5 ; carpus, 6, and 

 meros, 11. The two following maxillipedes do not differ con- 

 spicuously from this, but in the two first thoracic limbs proper the 

 dactylus is rather less than half the length of the propodos and the 

 carpus is more than half the length of the meros. In the last 

 limb the proportions are, dactylus, 4*5; propos, 4*5; carpus, 3 ; 

 meros, 19 '5. 



The telson is much more slender, but otherwise precisely similar. 



A score or so of individuals of this species were taken between 

 the ice floes in lat. 62° S. on the 1st of January, 1899, the temperature 

 not recorded. They were in a terribly bad state of preservation. 



3. CUMACEA. 



A single specimen of this group was taken off Cape Adare, but it 

 is in a mutilated condition. 



CRUSTACEA ARTHROSTRACA. 



1. ISOPODA 



TANAIDAE. 



Like many others, this family stands much in need of revision. 

 Fifteen genera, containing something like sixty species, have been 

 described, and many of these are only known from single specimens. 

 (Dollfus, 8.) The species are separated by very minute characters, 

 and very little is known concerning their life histories and the extent 

 to which sexual dimorphism occurs. Mr. Beddard has described in 

 the ' Challenger ' Pteports (2) a species under the name of Paratanais. 

 dimorphus, but this species does not seem to belong to any of 



