Crustacea. 253 



fringe of spinous setae. Tlie palj) has the proximal joints stoul, Uie 

 meros and carpus being laterally expanded, the propodos and dactylus 

 are quite slender. The dactylus, the extremity of the propodos and 

 the inner margins of the carpus and meros all hear comparatively 

 long setae. The epignath is large antl ovoid in shape, but the 

 external margin is angular. 



Thoracic appendages. The seven pairs are long, sub-equal and 

 much alike. They present no striking features ; the meros is 

 expanded distally and bears a tuft of stout setae at its extremity, the 

 carpus and propodos are sub-equal in length, the latter bearing a 

 triunguiculate claw. 



The uropods are large and considerably longer than the pleon ; 

 the basal joint is distally expanded and almost bi-lobed ; the podites 

 are a long oval in shape, the exopods being much the smallest. The 

 entire organ bears tufts of setae at regular intervals. 



Three specimens of tliis species were taken off Cape Adare in 

 13 fathoms with a temperature of 28 '9° Fahr., and three or four more 

 were found on the beach after a gale. 



Dr. Pfeffer (24) has described a species from South Georgia 

 which is undoubtedly very closely allied to the ' Southern Cross ' 

 species. He considered himself justified in creating a new genus 

 Notasellus for its reception, though it very closely resembles certain 

 northern species of the widely distributed genus Janira. 



Haliachis austkalis. 



(PL XXXIV., fig. 1, and PI. XXXYII.) 



Specific character. Pleon ovoid, notched at the insertion of the 

 uropods. 



Size. Exclusive of antennae, about 4 mm. 



Cephalon. Wide, truncate in front, with deep recess for the 

 origin of the antennae. The lateral margin of this recess forms a 

 stout outwardly curved tooth. Eyes large, situated on a lateral 

 projection of the hinder part of the cephalon. Part of the mouth 

 organs project in front of cephalon and can be seen from the dorsal 

 surface. 



Thorax. The first four segments do not conspicuously differ in 

 size, although the first is the smallest. The epimera of the first three 

 segments are pointed and of the fourth truncate. The three posterior 

 segments become reduced in size and more curved in a backward 

 direction in passing to the hinder extremity. 



