I9I7-] 



vS. Kemp : Notes on Crustacea Decapoda. 



257 



pressed and the fingers, which are longer than the palm, meet 

 throughout their length when the claw is closed and hear a regular 

 series of 5 or 6 teeth on their inner margins. 



The walking legs are not very slender ; those of the second 

 pair are about twice the length of the carapace and rostrum. The 

 anterior border of the merus in each pair ends in a prominent 

 tooth. The dactylus of the first walking legs is unarmed; that of 

 the three following pairs is provided with a stout recurved tooth 

 close to the apex. The chelipedes bear scattered hairs; these also 

 occur on the walking legs, which are, moreover, densely fringed on 

 their posterior margins. 



F"iG. 5. — Rliynchoplax octagonalis, sp. now 



The species is described from a single ovigerous female, with 

 carapace about 3'9 mm. in length. 



De Man's Elarnene filholi ^, from Noordwachter I. near Batavia, 

 is without doubt a species of Rliynchoplax and resembles R. octag- 

 onalis in the structure of the dactyli of the walking legs and in 

 the position of the single tooth found on the lateral margin of the 

 carapace. In the Javanese species, however, the eye is altogether 

 concealed from above, the carapace and rostrum are quite differ- 

 ent in form and the legs are much more slender. Miss Rathbun's 

 R. coralicola''' from Singapore also possesses a single tooth at the 



1 De Man, Archiv.f. Naturgesck., IJII, i, p. 386, pi. xvii, fig. 3 (1S87). 

 •^ Rathbun, K.Danske Vid.Selsk, Skrift. (7), natiirvid. og math., V, p. 316, 

 text -fig-. 5 (1910). 



