1917- 



vS. Kemp : Notes on Crustacea Decapoda. 



303 



indicate that the methods I adopted in 1912, in comparing the 

 specimens from Assam with those from New Zealand were reliable 

 and that had specific differences existed they would infallibly have 

 been detected. If the record from Assam were based on speci- 

 mens from one locality I would have rejected it as untrustworthy, 

 but the fact that samples exist from two distinct places renders 

 it improbable that any mistake can have arisen. 



Paratya australiensis, sp. nov. 



189.1.. Miersia compressa, Ortmann, Jenaisclie Denkschrift, VIII (:=Senion's 

 Zool. Forschioigsreis. i>! Aiistralien etc., V), p. 10. 



1903. Xipl ocaris compressa, Thomson, Trans. Linn. Soc. Zool. (2) VIII, p. 

 449 (part). 



1905. Xiphocaris compressa, Bouvier, Ann. Set. France Belgique, XXXIX, 

 fig. I, p. 61. 



Hitherto the Australian representative of the genus Paratya 

 has been considered to be specifically identical with that from 



Pig. 5. — Paratya australiensis, sp. nov. 



a. First peraeopod. 

 h. Second peraeopod. 

 c. Third peraeopod. 



d. Dactylus of third peraeopod. 



e. Fifth peraeopod. 



/. Dactylus of fifth peraeopod. 



Japan, but judging from the specimens in the Indian Museum it 

 is undoubtedly distinct. Three samples of Australian specimens 

 have been examined, all of which differ in certain well-marked 

 features from the Japanese examples. They also differ rather 

 considerably inter se and it appears not unlikely that recognisable 

 races exist in different parts of the Australian continent. As types 

 of P. australiensis I have selected a number of specimens from 

 Clyde, near Sydney in New South Wales. 



The rostrum in P. australiensis varies considerably in length, 

 extending to the end of the antennular peduncle or far beyond the 

 apex of the antennal scale, sometimes (in specimens from Sydney) 

 reaching beyond the latter point by as much as one quarter its 

 length. On its upper border it bears an uninterrupted series of 



