13° 



Records of the Indian Museum. [Voi,. XXIV, 



tridentata. Apart from the fact that it possesses only a single 

 tooth on the lower border of the rostrum, it differs conspicuously 

 from Borradaile's figure in the proportions of the segments of the 



second peraeopods. The 

 merus is longer than the 

 carpus and much longer 

 than the fingers and the 

 carpus is stouter, only about 

 35 times as long as its dis- 

 tal breadth. Tattersall has 

 given a tabular statement of 

 the proportionate lengths of 

 the segments of the second 

 peraeopod, the figures being 

 derived from his own speci- 

 mens, from Nobili's measure- 

 ments and from the illus- 

 trations by Dana ar>d Borra- 

 daile. The corresponding 

 values for my specimen are 

 merus i'2, carpus ro, palm 

 i*6 and fingers o # 8. In these 

 proportions the specimen 

 agrees fairly well with those 

 that Tattersall and Nobili 

 examined. The shorter palm 

 in Dana's figure may be due 

 to the less well-developed condition of his specimen; the very 

 short merus in Borradaile's figure is, I believe, an error in draw- 

 ing. In my specimen, which is a male, the lower border of the 

 merus is sinuous, conspicuously con- 

 vex in the middle ; this character is 

 shown in Borradaile's figure and is 

 probably found only in males. The 

 dentition of the fingers is shown in 

 text-fig. 8, 



Tattersall's notes and- the evidence 

 of my specimen, identified as P. 

 tridentata by Borradaile himself, all 

 point to the conclusion that only 

 one species of Palaemonella with 

 subterminal carpal spine is at pre- 

 sent known. 



Dana's specimen came from the 

 Sooloo Sea. Borradaile's original 

 example of P. tridentata was obtain- 

 ed at Funafuti in the EUice Is. and 

 he has since recorded the species 

 various localities in the Maldives and the Chagos Archipelago. 

 Nobili has recorded a specimen under the name P. tridentata 



Text fig. 7. — Merus and carpus of second 

 peraeopod viewed laterally from inner 

 side. 



a. Palaemonella vestigialis, sp. nov. 



b. Palaemonella tenuipes Dana. 



Text 



Kim 



-:•!<;. 8. — Palaemonella 

 tenuipes Dana. 



is of second peraeopod. 



under the same name from 



