TO INDIAN CARCINOLOGY. 409 



The pterygostomial regions are faintly granulated. The sternal region resembles that of 

 B. ])ersoHatus, but is narrower between the second pair of legs. 



The total leugth of the body, with the al)domen extended, is 20 mm. ; the carapace is 

 14 mm. long and 7"3 mm. wide. 



In the British Museum there is a single specimen of this species, taken by H.M.S. 

 ' Penguin ' on Holothuria Bank, N.W. Australia, at a depth of 39 fathoms. It also is a 

 female, but considerably larger than the Ceylon example, having a total length of 31 mm., 

 with the carapace 22 mm. long and 11'7 mm. wide. Its nearest ally is R.personaliis, 

 Henderson, from Amboina, but the two are readily distinguished. In R. personutus, the 

 carapace is scarcely granulated even in front, the rostrum is entire, and there is no spine 

 or tooth between the fissures ; on the chelipedes there is a spine at the inferior distal end 

 of the ischium, two spines on the upper distal end of the carpus, and one on the propodus 

 over the base of the mobile finger ; the immobile linger also is much broader than in 

 the new species. B. Icevis, Latr., is a much larger species, with very deep frontal fissures, 

 and the lateral spine larger than the autero-lateral, besides other points of difference. 



Group IIlPPIDEA. 



Genus IIippa, Fabr. 



202. HiPPA ASIATICA, Milne-Edw. 



H. asiatica (Milne-Eclw.), Miers, Journ. Liiiu. Soc, Zool. vol. siv. p. 325, pi. v. tig. 11 (1877). 

 Eameswaram {Thurston). Abundant at Madras and on the S. Indian coast generally, 

 burrowing in sand at low water {J. B. H.). 



Distribution. Indian Seas, Ceylon, Malay Archipelago. 



Genus Albunea, Fabr. 



203. Albunea symnista (Linn.). 



A. symnista (Linn.), Miers, Jouni. Linn. Sor;., Zool. vol. xiv. p. 326 (1877). 

 Rameswaram {Thurston). Common on the S. Indian coast in sand at low water; less 

 common at Madi-as than Ulppa asiatica {J. B. H.). 



Distrilmtion. Mascarencs, Indian Seas, Malay Archipelago. 



204. Albunka Tuurstoni, n. sp. (I'l. XXXVIII. figs. 13-15.) 



Cheval Par, five specimens {Thtirston). 



The carapace is glabrous and faintly cjirinated in the middle line, witli the same lines 

 marking it which are seen in tlie other species of the genus. The surface is slightly 

 pubescent between the frontal margin and ihe most anterior line on tlie carapace. The 

 median frontal spine is acute, and does not extend as far as the apices of the submedian 

 spines which bound tlie central concavity in which the median spine is placed. On 

 either side of the central concavity are eight or nine spinules ; the first or submediau 

 is of moderate size, the second to fifth inclusive are small, the sixth to eighth are larger 



