540 COLLECTIONS Fit 031 THE WESTERN INDIAN OCEAN. 



fifth or last pair are shorter than the preceding, the merus-joint is 

 armed with a spine near the distal end of its posterior margin, the 

 penultimate joint has its posterior margin armed with a series of 

 spinules, the last joint ovate, of the form usual in the genus. 

 Colour (in spirit) yellowish white ; chelipedes punctulated exter- 

 nally with red, and fingers broadly banded with dark brown ; the 

 ambulatory legs are marked with dusky spots as in some other 

 Thalamitce. Length of carapace nearly 1 inch 2 lines (29 millim.), 

 breadth to apex of the fifth lateral spines about 1 inch 11 lines 

 (47 millim.) ; length of chelipede nearly 2 inches 7 lines (65 

 millim.). 



The single specimen (an adult male) was obtained at the Sey- 

 chelles, 4-12 fms. (No. 194). 



It is distinguished from all other Thalamitce known to me having 

 four frontal lobes and the penultimate joint of the fifth ambulatory 

 legs denticulated, by the form of the lobes of the front, the longer 

 fourth lateral marginal spine of the carapace, and the strongly 

 spinulose basal antenna! joint. 



49. Thalamita Integra, Dana. 



Seychelles, 4-12 fms. (No. 194) ; an adult male. 



Two very small specimens collected with this example belong 

 either to T. admete or T. savignyi, since the basal antennal joint is 

 granulated. 



Of T. Integra there are specimens in the British-Museum col- 

 lection from the Fiji Islands, Nairai (H.M.S. ' Ht raid'), and Sand- 

 wich Islands (U.S. Exploring Expedition), and also specimens from 

 Honolulu in the same group (Lieut. Strickland), besides the speci- 

 mens of the Atlantic variety of this species which I have recently 

 designated africana *. 



50. Thalamita crenata, Mwppell. 



Mozambique, between tide-marks (No. 227) ; three small speci- 

 mens. 



For the geographical distribution of this species see p. 232. One 

 of the three specimens from Mozambique (a male) approaches T. 

 stimpsonii in the somewhat smaller fourth tooth of the lateral 

 margins, but there are no granulations upon the palms of the 

 chelipedes as usual in that species. 



51. Thalamita picta, Stimpson. 



A small male from the beach, Darros Island (Xo. 200), is d 



here, but with some uncertainty, as the fifth ambulatory legs are 

 deficient. 



In a male, also of small size (length of carapace about 7 lines, 



* Ann. & Mag. Nat". Hist. ser. 5, viii. p, 218 (1881)1 



