1918.] Stanley Kemp: Decapodd of the Inle Lake. 85 



Dr. Aiuiandale has uivoii iiic the foUowiiiu notes on the cohjuration 

 of living specimens of this species. " Dorsal surface dark ohve ; upper 

 surface of walking legs marbled with a paler shade. Tips of fingers 

 of large claw and of large spine on same a2Jpendages white. Frontal 

 and orbital margins reddish brown. Ventral surface of body yellowish 

 white."' 



The species,' which is named after Mr. C. E. Browne, Political Adviser 

 in the Yawnghwe State, is ap2)arently not unconnnon in the vicinity 

 of the Inle Lake, but was not found in the lake itself. The specimens 

 are from the He-Ho stream, 3800 ft., from the Hsin Dawng stream, near 

 Yawnghwe, 3300 ft., and from the neighbourhood of the Ngot bat cave, 

 4000 ft. They were found in February and March 1917, under stones 

 at the edge of running water and in holes in the banks of small streams. 



The type specimens are from the He-Ho stream and bear the number 

 9763/10, Zoo/. Surv. Ind. 



Potamon (Potamon) acanthicum, sp. nov. 

 Plate xxiv, hgs. 3, 4. 



The carapace is short and broad, the length being a little less than 

 three-c|uarters the greatest depth. The distance in the middle line 

 between the cervical groove and the posterior border is conspicuously 

 less than the distance between the cervical groove and the epigastric 

 crests. The upper surface is strongly convex in both directions, the 

 depth being about half the greatest breadth (pi. xxiv, figs. 3, 4). 



The areolation of the carapace is incomplete. The cervical groove 

 is visible only iu the posterior jjart of its course and at the point where 

 it cuts the post-orbital crests ; between these limits it is altogether 

 indistinguishable in adults, though sometimes obscurely defined in young 

 specimens. As in F. browiieanuHi the antero-lateral boundaries of the 

 mesogastric areola are wanting. In the middle line behind the cervical 

 groove a pair of small lobules are distinguishable and behind these again 

 are faint lateral grooves partially defining a cardiac areola. There is 

 no trace of an ej)ibrancliial groove. The surface is for the juost part 

 free from any granulation, but is sparsely and coarsely pitted. As a 

 rule a pair of large and shallow pits are conspicuous on either side, placed 

 in a transverse line in front of the posterior portion of the cervical groove. 

 Close to the antero-lateral margin in the vicinity of the epibranchial 

 tooth there is a small number (usually not more than half a dozen) of 

 rather large tubercles. On the side-walls of the cai'apace there are 

 inconspicuous oblique rugae which pass over the postero-lateral margins 

 and are usually visible fioni aljove. 



The epigastric and post-orbital crests are well dcliiicd and together 

 form a connnon curve ; the former extend latlier fai' forwards and 

 would touch a line joining the posteii(»r limits of the orbits. The 

 edges of the crests are coarsely pitted and have a rugose aj)peai'ance ; 

 they are not undermined. The cervical ^I'oove cuts the post-orbital 

 crests at an exceptionally oblitpie angle. The fissures between the 

 epigastric and post-orbital crests are deep. 



