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along the outer margins. The buccal cavity narrows backward, so that the lateral margins 

 are not parallel, but convergent behind. 

 6" The walking legs are more slender, and the propodites of second and especially 

 of third pair elongate, narrowing distally (fig. ^d); the dactyli of penul- 

 timate pair are longer than those of first pair and scantily hairy. 

 Dimensions in mm. : 



Fronto-orbital breadth . . . 

 Greatest breadth of carapace . 



Width of front 



Length of carapace .... 



In its measurements (length of carapace, to breadth as i : 1.3, fronto-orbital breadth about 

 55 °/^ of breadth of carapace) this species much resembles the type species, T. canaliailata 

 Rathbun, from the Gulf of Siam, but this species is much less hairy, the eye-peduncles are 

 almost circular, not piriform and the eyes faintly pigmented, the front widens anteriorly (which 

 is not at all the case in the new species, in which on the contrary the lateral margins of the 

 front greatly diverge backward), the lateral margins of the buccal cavity are parallel and the 

 antero-external angle of the merus of the external maxillipeds is not produced at all, finally 

 the second pair of walking legs, not the penultimate one, is the longest, and the inner angle 

 of the wrist of the chelipeds is not pronounced. 



Xenophthalmodes Richters. 



1880. Xenophthalmodes Richters. Beitr. Meeresfauna Mauritius etc., p. 155. 



The genus much resembles Ceratoplax, Typhlocarcinus and Typhlocarcinops in the 

 general shape of the carapace, in the eye-stalks being firmly fixed, the eyes extremely small 

 or absent, the chelae compressed, high, partly pubescent and granulate on outer surface ; the 

 first abdominal segment, however, does not reach so far outward as to cover the whole breadth of 

 the last sternal segment; the lateral margins of the carapace are entire and diverging backward, 

 so that the greatest breadth is lying far behind ; this greatest breadth does not much exceed 

 the length of the carapace; the dactyli of the walking legs regularly decrease in size from the 

 first to the fourth pair. 



The "Siboga" collected an apparently new species of this genus. 

 Key to the species : 

 Carapace practically bare, except along the margins. Free edge of 

 epistome thickened, not much prominent, external margin of merus 

 of external maxillipeds passing with a distinct angle into anterior 



margin. First abdominal appendages of cf concealed beneath abdomen. X. moebii Richters^) 

 Carapace covered with a close pubescence. Free edge of epistome 

 lamellar, prominent, vertical, external and anterior margins of merus 



I) L. c, p. 155, pi. 16, f. 29, pi. 17, f. 1—5; MlERS, Proc. Zool. Soc. London, 1884, p. 12; DE Man, Notes Leiden Mus., 

 V. 12, 1890, p. 68, pi. 3, f. 5; Alcock, Journ. As. Soc. Bengal, v. 69, pvt 2, 1900, p. 324. Hab. Mauritius, Red Sea, Persian Gulf, 

 Malabar and Coromandel coast, Gulf of Martaban and Andamans. 



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