140 Transactions. — Zoology. 



Among these was one belonging to the very remarkable genus Apseudes. 

 Of this genus there are two species given in Bate's and Westwood's "British 

 Sessile-eyed Crustacea," and Mr. Haswell has lately described one from 

 Australia,* but the animal I have does not belong to either of these three 

 species. 



For the sake of those who may not be able to consult Bate's and West- 

 wood's book, I transcribe the generic characters. 



Genus Apseudes, Leach. 

 (Bate's and Westwood's "British Sessile-eyed Crustacea," vol. ii., p. 144.) 



" Body elongated. Head and first segment of the pereion confluent. 

 Upper antennae longer than the lower, with the first joint of peduncle long 

 and robust, the flagellum consisting of two elongated articulated filaments. 

 First pah- of gnathopoda chelate ; second pair having the propodos trans- 

 versely dilated. Pleon terminated by a large segment bearing two long and 

 two short slender filaments." 



Apseudes timaruvia, sp. nov. PL XVIII. 



Front of cephalon broad, with a slight projection in the centre, and pro- 

 duced into a sharp point immediately in front of the eyes. Eyes small. 

 Upper antennae with the basal joint of peduncle very large and strong, with 

 a prominence on the inside ; second joint fully twice as long as the third. 

 Flagellum not so long as peduncle, secondary flagellum rather more than 

 half as long as the primary. First pair of gnathopoda very large and 

 strong, fixed finger with a prominence on its inner surface, and having the 

 end tipped with hairs. Propodos of the second pair of gnathopoda not 

 dilated. Pleon short, sixth segment not longer than the rest together. 

 Terminal tail-legs with the outer branch half as long as the inner. 



Colour, light brown. 



Length, about J of an inch. 



Hah. Timaru. 



Of this species I have obtained a single specimen only, but I have 

 examined it with considerable care and made as much as I could out of it, 

 because it belongs to a very remarkable genus of Crustacea. Bate and 

 Westwood in their book on the British Sessile-eyed Crustacea say " this is 

 one of the most interesting genera of Crustaceous animals." This is be- 

 cause it possesses both Isopodan and Amphipodan characters, and also 

 some that belong to the Macroura ; the union of the head with the first 

 thoracic segment into a "carapace," and the great chelate gnathopoda 

 make the dorsal view very like that of a Macrourous Decapod. 



The animal I have described differs from the other species of the genus 

 in some points, as will be seen from the fuller description given further on, 



* Proceedings Linntean Society of New South "Wales, Vol. VI., Part the Second, p. 193. 



