154 Records of the Indian Museum. [Vol,. XXIV, 



is similar and in minor details is variable. There are one or two 

 teeth on the dactylus which fit into a recess in the fixed finger, 

 while on the fixed finger itself there are only two teeth, both 

 rather large, in place of the three found in P. latipollex. 



The last three peraeopods are rather more slender. In the 

 third pair the merus is about ii'5 times as long as wide and the 

 propodus is 9 times as long as the dactylus. The accessory claw 

 of the dactylus (text-fig. 20c) is small and slender ; it is sometimes 

 missing, having apparently been broken off. 



The three specimens are all ovigerous females. The largest, 

 from which the figure in the Illustrations of the Zoology of the l Inves- 

 tigator ' is drawn, is about 27 mm. in length. The specimens are 

 from deep water and have a soft membranous integument. 



9221/0. Laccadive Sea, 703 ' Investigator/ One, Type. 



fms., io°47'45" N., Nov., 1891. 



72°4o'2o"E. 



2129-30/10. Laccadive Sea, 430 ' Investigator,' Two, Types. 



fms., 7°i7'3o" N., Oct., 1897. 



7 6°54'3o" E. 



The identity of the two specimens recorded by Miss Rathbun 

 (loc. cit.) from the Hawaiian Is. appears to me to be doubtful. 



Periclimenes (Periclimenes) alcocki, sp. nov. 



1 901. Palaemon (Br achy carpus) laccadivensis, Alcock, Cat. hid. deep' 

 sea Crust. Decap. Macrura and Anomala, p. 138 (in part). 



This species is represented in the collection by a single large 

 specimen obtained by the ' Investigator ' and referred by Alcock 

 to Palaemon (Brachycarpus) laccadivensis. It differs from the 

 types of the latter species and from Periclimenes latipollex in 



"°a t rig 



Text-fig. 21. — Periclimenes alcocki, sp. nov. 

 Anterior part of carapace, rostrum, etc. 



a number of particulars which appear to entitle it to specific 

 distinction. It may be separated from the related forms by the 

 following characters : — 



The rostrum (text-fig. 21) is deep and reaches just beyond the 

 end of the antennular peduncle. On its upper margin it bears 9 



