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



Dr. Annandale has given me the following notes on the colouration 

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

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

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

 and orbital margins reddish bro^^'n. Ventral surface of body yellowish 

 white." 



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

 in the Yawiighwe State, is apparently not uncommon iji 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, Zool. Siirv. Ind. 



Potamon (Potamon) acanthicum, sp. nov. 

 Plate xxiv, figs. 3, 4. 



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

 three-quarters 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 bi'eadth (pi. xxiv, figs. 3, 4). 



The areolation of the carapace is incomplete. The cervical groove 

 is visible only in the posterior part 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 P. hrowneanum 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 epibranchial groove. The surface is for the most 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 carapace there are 

 inconspicuous oblique rugae which pass over the postero-lateral margins 

 and are usually visible from above. 



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

 form a common curve ; the former extend rather far forwards and 

 would touch a line joining the posterior limits of the orbits. The 

 edges of the crests are coarsely pitted and have a rugose a})i)earance ; 

 they are not undermined. The cervical groove cuts the ])ost-orbital 

 crests at an exceptionally oblique angle. The fissures between the 

 epigastric and post-orbital crests are deep. 



