410 ME. J. E. HENDERSON — A CONTRIBUTION 



even than the first, and the ninth is small or even ahsent. The second, third, and fourth 

 spinules are rudimentary or even absent in some specimens. The antero-lateral or sub- 

 hepatic spine is prominent (much more so than in A. microps). The eye-peduncles are 

 narrow and elongated, the length exceeding twice the breadth at the base ; the breadth 

 is slightly greater at the middle than at the base, the outer margin is convex, and the 

 apex is pointed. The cornea is minute and not placed on any special lobe. 



The chelipedes and legs resemble those of the other species of the genus. The outer surface 

 of the hand has comparatively few short pubescent ridges or lines, the longest being one 

 which runs obliquely across nearly two thirds of the outer surface and ends on the immo- 

 bile finger. The telson is ovate in outline, with the outer margin regularly arcuate and the 

 apex subobtuse ; the upper surface is non-pubescent, and has three faint carinse confined 

 to its middle portion, *. e. not running from end to end. 



The largest specimen, a male, is 14*5 mm. long when the abdomen is extended, and 

 the carapace is 75 mm. in breadth at the front. 



This species is most nearly allied to A. microps, Miers (Sooloo Sea and Celebes Sea), in 

 which species, however, the eye-peduncles are shorter and broader, with the cornea on a 

 small constricted lobe ; the telson is not regularly arcuate externally, and its upper surface 

 is pubescent. A . speciosa, Dana, from the Sandwich Islands, has the eye-peduncles slender, 

 but their outer margins concave. The eye-stalks of our species resemble most those of 

 A. Gibbesii, Stm., a very distinct species from the south-east coast of the United States. 



1 have pleasure in naming this interesting species after my friend Mr. Thurston, of the 

 Madras Museum, by whom it was discovered. 



Group Pagtjridea. 

 Genus Ccenobita, Latr. 



205. Ccenobita rtjgosa, Milne-Edw. 



C. ruf/osa (Milne-Edw.), Henderson, ' Challenger ' Anomura, p. 51 (1888), ubi synon. 

 Rameswaram, Tuticorin, and Silavaturai Par {Thurston). Common on the S. Indian 

 coast (J. R. H.). 



Distribution. Prom the Eed Sea, E. Africa, and Natal to Japan, Australia, and the 



Pacific. 



206. Ccenobita compkessa, Milne-Edw. 



C. compressa (Milne-Edw.), Ortmann, Zoolog. Jahrbiicher, Bd. 6, Abth. f. Syst. p. 318,/Taf. xii. fig. 23 



(1892), ubi synon. 



( = C. violascens, Heller). 



Not uncommon in the back waters along the Madras coast (J. B. II.). 

 Distribution. E. Africa (Hilgendorf, Hoffmann) ; Ceylon ( Ortmann) ; Nicobars (Heller) ; 

 Mergui (De Man) ; Malay Archipelago (Miers, De Man) ; Japan (De Haan). 



