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



I have also seen two specimens belonging to the Paris Museum 

 from Mahe in the Seychelles (Alluaud coll.). The specimens from 

 Port Blair were all obtained in Ross Channel on a bottom composed 

 mainly of small corals and sponges. 



P. tenuipes was originally described from New Britain and has 

 since been recorded by Nobili from Beagle Bay in New Guinea and by 

 Borradaile from Haddumati Atoll in the Maldives and, as P. kol- 

 umadulensis , from Kolumadulu Atoll in the same group. 



Periclimenes (Ancylocaris) longimanus (Dana). 



1852. Anchistia longimana, Dana, U. S. Explor. Exped., Crust. I, p. 

 579, pi. xxxvii, figs. 6a, b. 



This species, of unknown locality, is easily distinguished from 

 all other known members of the genus by the extraordinary length 

 of the. antennular peduncle. It reaches well beyond the antennal 

 scale and the ultimate segment, according to Dana's figure, is 

 6 times as long as wide. 



Periclimenes (Ancylocaris) digitalis, sp. nov. 

 (Plate VIII, fig. 12.) 



The rostrum reaches slightly beyond the end of the antennal 

 scale. It is straight at the base, but a little upturned in its distal 

 third. On the upper border, in the single specimen examined, there 

 are 11 teeth; of these the two hindmost are situated on the cara- 

 pace behind the orbit and the posterior tooth is separated from the 

 next by a rather considerable interval. The remaining teeth are 

 large and evenly spaced except for the foremost, which is small, 

 placed near the tip, and rather remote from the next of the series. 

 On the lower border there are 2 teeth, placed just in front of the 

 middle of the rostral length. 



The carapace bears sharp hepatic and antennal spines, the 

 former on a lower level than the latter. The lower limit of the 

 orbit is defined by an acute process and there is a conspicuous ridge 

 close behind the orbital margin and parallel with it. Superiorly 

 this ridge ends in a minute tubercle which is probably a vestige of 

 the supra-orbital spine, inferiorly it ends in the antennal spine. The 

 ridge is almost exactly similar to that found in Palaemonella vesti- 

 gialis but is rather more sharply defined. 



The eye is large with the cornea spherical and wider than the 

 stalk. The ocular spot is visible, but is partly confluent with 

 the cornea. 



The lateral process of the basal segment of the antennular 

 peduncle (text-fig. 650) reaches barely to the middle of the segment ; 

 the terminal spine of the outer margin is short and the margin 

 between this spine and the articulation of the second segment is 

 convex. The outer flagellum is cleft for only a very short dis- 

 tance ; the fused basal part comprises 16 segments and is longer 

 than the peduncle. The antennal scale (text-fig. 65Z)) is a little 

 more than 3 times as long as broad ; the outer margin is straight 



