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



The sixth abdominal somite is about i"5 times as long as the 

 fifth. The telson bears two pairs of dorsal spines, so arranged as 

 to divide its length into three more or less equal parts. The outer 

 margin of the external uropod is ciliated. 



The single specimen is an ovigerous female about 22 mm. in 

 length. 



In the possession of a post-orbital ridge this species, as already 

 noted, bears* a close resemblance to Palaemonella vestigialis; the 

 mandible, however, is devoid of a palp (text-fig. 65c). In the genus 

 Periclimenes it does not appear to have any close allies. 



C 404/1. Port Blair, Andamnns, S. Kemp, Feb., One, Type. 



3-5 fms. 192 1. 



The specimen was caught off Viper I. on a bottom composed 

 of mud and decaying vegetation. 



Periclimenes (Ancylocaris) brocki (de Man). 



1887. Anchistia Brockii, de Man, Arch. Naturgescli. LI II, i, p. 548, 



pi. xxiia, figs. 3, 3«-rf. 

 1917. Periclimenes (Cristiger) brocki, Borradaile, Trans. Linn. Soc. (2) 



Zool. XVII, p. 324. 



1 have examined a specimen from Suvadiva Atoll in the 

 Maldives, determined by Borradaile and have nothing to add to 

 de Man's detailed description. The species was described from 

 Amboina. 



Periclimenes (Ancylocaris) rotumanus Borradaile. 



1898. Periclimenes rotumanus, Borradaile, Proc. Zool. Soc. London, 



p. 1005, pi. Ixiv, figs. 5, $a, b. 

 1899. Periclimenes rotumanus, Nobili, Ann. Mus. civ. Genova (2) XX, 

 P- 235- 



I have seen the type of this species in the Cambridge Mu- 

 seum ; the second peraeopods are now missing. The species is 

 recorded from Rotuma in the S. Pacific (Borradaile) and Beagle 

 Bay, New Guinea (Nobili). 



Genus Harpilius Dana. 



•1852. Harpilius, Dana, U. S. Explor. Exped., Crust. I, p. 575. 

 191 7. Harpiliopsis and Harpilius, Borradaile, Trans. Linn. Soc. (2) 



Zool. XVII, pp. 379,380. 

 1921. Harpilius, Tattersall, Journ. Linn. Soc, Zool. XXXIV, p. 338. 



This genus is very closely related to Periclimenes, agreeing 

 with it in all important structural characters and differing only in 

 its more clumsy and depressed form. In habit of \>oc\y there is, 

 moreover, considerable variation ; of the species I have myself 

 examined H. beaupresi and H. depressus are very strongly depressed, 

 while in H. lutescens and H. gerlachei this feature is much less pro- 

 nounced. 



In Harpilius the distal spine of the basal antennular segment 

 is usually very long, the antepenultimate segment of the third 



