174 PALAEMON REUNIONNENSIS. 



P al a em on Reunion 7i en sis Hoffm. 



Hoffmann , Crustac. de Madagascar , p. 33 , pi. IX , fig. 66 

 and 67. Palaemon equidens Heller, 1. e. p. 418, taf. H, 

 fig. 44. 



Twelve specimens of this species have been collected at 

 the island of Reunion by Mrs. Pollen and van Dam. 



This species which has been identified by Heller with 

 Pal. equidens Dana, this author having received it from 

 Mauritius , is closely allied to Pal. ornatus Oliv., which latter 

 species is also found at the island of Reunion , though being 

 quite different from Pal. Reunionnensis. 



The slender rostrum always reaches beyond the end of 

 the peduncle of the internal antennae, sometimes even to 

 the apex of the scale of the external antennae , and extends 

 more backward so that in most individuals there are three 

 teeth placed upon the cephalothorax behind the eyes ; upper 

 margin with 8—10 teeth, inferior margin 3 — 4 toothed; 

 the upper margin extends straightly , being a little convex 

 above the eyes and slightly ascending toward the apex. 

 The first pair of legs reach a little beyond the end of the 

 rostrum , the second pair of legs are very elongated , slender 

 and equal in size. (Mr. Hoffmann says erroneously that 

 the carpopodite of the second pair of legs is longer than 

 the palm , for even the contrary takes places , the 

 palm being longer than the carpopodite , and so it is 

 represented in the figure). In a male specimen 130 mm. 

 long, the second pair of legs measure 155 mm.; the 

 arm , extending beyond the scale of the external anten- 

 nae, has a length of 34 mm., the carpopodite of 33 mm., 

 the slender palm of 44 mm. and the toothed and closely 

 united fingers of 25 mm. 



In a male of a length of 105 mm., the second pair of legs 

 measure only 82 mm., the arm reaches no more to the 

 end of the antennal scale, and has a length of 18 mm., 



Notes from the Leyden Museum. 



