CEIJSTACEA OP THE MEEGUI AECHIPELAGO. 89 



the genus Eucrate the internal orbital hiatus is occupied by 

 a process at the base of the antennae, so that the flagellum is 

 quite excluded from the orbital cavity. In the genus Carcinoplacc, 

 on the contrary, at least in the two species which I have 

 studied, viz. G. setosus and O. integer, the internal orbital hiatus 

 is occupied by the base of the antennae itself, as in JPilumnus, so 

 that the flagellum is not excluded from the orbits. According 

 to the descriptions of Milne-Edwards and Stimpson, the genera 

 PseudorJiomhila and Pilwinnoplax seem to agree with Garcinoplax 

 in the flagella of their external antennae not being excluded from 

 the orbits ; whereas the genus Heteroplax, Stimps., agrees with 

 JEucrate in the character of its external antennae. 



59. Etjcbate AEEiisris, Haswell. (PI. V. figs. 5-7.) 



Eucrate affinis, Haswell, Catalogue of the Australian Stalk- and Sessile- 

 eyed Crustacea, 1882, p. 86. 



? Pilumnoplax sulcatifrons, Stimpson, Proc. Acad. Nat. Scienc. Phila- 

 delphia, 1858, p. 93. 



Four fine specimens (three S ? one $ ) of a crustacean collected 

 at King Island Bay, I refer, although with some hesitation, to 

 the rare species E. affinis, Haswell. These specimens not only 

 belong to the genus Eucrate, de Haan, but in many characters 

 even present a striking resemblance to the typical representative 

 of this genus, E. crenata from Japan. Besides their smaller size, 

 they may be distinguished from the latter species by the more 

 depressed cepbalothorax, and by the ridge-like elevations with 

 whieh the upper surface is covered. 



I refer these specimens to Haswell's E. affinis from the 

 Australian coast, although his description of it does not com- 

 pletely agree with them. Thus Haswell does not describe the 

 anterior margin of the front as being transversely sulcated ; and 

 according to the same author, the wrist is very hairy externally, 

 whereas in the Mergui specimens it is only hairy anteriorly towards 

 and near the articulation with the hand. In Haswell's specimens, 

 also, the hands presented a longitudinal ridge close to the inferior 

 border ; but in the Mergui specimens an impressed longitudinal 

 line is found only on the outer surface of the immobile finger 

 close to the inferior border, the palm being quite smooth. 



The following is a full description of the four specimens. 

 The cepbalothorax closely resembles that of E. crenata, the 

 proportion of the breadth and the length being precisely the 



