TO INDIAN CARCINOLOGY.' 409 



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

 B. personatus, but is narrower between the second pair of legs. 



The total length of the body, with the abdomen 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 B. personatus, 

 Henderson, from Amboina, but the two are readily distinguished. In B. personatus, 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. Iceois, Latr., is a much larger species, with very deep frontal fissures, 

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



Group Hippidea. 



Genus Hippa, Fabr. 



202. Hippa asiatica, Milne-Edw. 



H. asiatica (Milne-Edw.), Miers, Joura. Linu. Soc, Zool. vol. xiv. p. 325, pi. v. fig. 11 (1877). 



Bameswaram (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, Journ. Linn. Soc, Zool. vol. xiv. p. 326 (1877). 



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

 common at Madras than Hippa asiatica (J. B. II.). 



Distribution. Mascarenes, Indian Seas, Malay Archipelago. 



201. Albunea Thurstoni, n. sp. (PL XXXVIII. figs. 13-15.) 



Cheval Par, five specimens (Thurston). 



The carapace is glabrous and faintly carinated in the middle line, with the same lines 

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

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

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

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

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

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



