346 ME. J. E. HENDEESON — A CONTEIBUTION 



18. Naxia TAruiis, Pocock. 



iV. taurus, Pocock, Ann. Mag. Nat. Hist. ser. 6, vol. v. p. 77 (1890). 



Gulf of Martaban, two males {Oates). 



I have compared these with the type-specimen and can find no difference except that 

 in the latter the rostral spines are much longer, being more than half the length of the 

 carapace, whereas in the only Martaban specimen which is perfect as regard the spines 

 they are less than half the length of the carapace. This difference cannot be regarded 

 as one of any importance. The accessory rostral spinules are placed nearer the apices 

 of the rostral spines than in the type, but this is perhaps only what might be expected 

 in a variety with the rostrum shortened. 



In the larger specimen the carapace (omitting rostral spines) is 15 mm. long ; the 

 type is similarly 20 mm. long. 



Distribution. China Sea {Pocock). 



Genus Schizophrys, White. 



19. Schizophrys aspera (Milne-Edw.). 



S. aspera (M.-Edw.),A. Milne-Edwards, Nouv. Arcli. Miis. Hist. Nat. t. viii. p. 231, pi. x. fig. 1 

 (1872), ubi synon. 



Tuticorin (Tlinrston) ; Ceylon {Hali/, Nerill) ; Kameswaram and Madras {J. B. H.). 



Strongly marked sexual differences are noticeable in this very common and variable 

 species. In the female the carapace is more uniformly granulated, the lateral spines 

 of the carapace are shorter, and the accessory rostral spinules are rudimentary. 



Distribution. From the Red Sea and East Africa, to Japan, New Caledonia, and the 

 Navigator Is. 



Genus IIoPLOPHRYs, n. 



Carapace subovate, with the regions moderately defined, the surface spinose. Rostrum 

 composed of two short, flattened, acute, and slightly divergent spines. A well-developed 

 preocular or supraocular spine, and a closed fissure on the upper orbital margin. Orbit 

 moderately circumscribed, only deficient below near the postorbital angle. Basal 

 antenual joint rather narrow, its distal external angle prolonged into a flattened acute 

 spiue, which is distinctly seen when the carapace is viewed from above ; the two succeed- 

 ing joints of the peduncle slender. External maxillipedcs with the ischium longitudin- 

 ally sulcate in the middle Hne externally ; the outer distal angle of the merus produced 

 into a rounded projecting lobe, and the inner angle slightly emarginate for the carpus ; 

 the exognath tapers rather abruptly from about its middle to the narrow distal end. 

 Chelipedes and ambulatory legs rather short, and spinose ; the chelipedes not enlarged 

 in the male, with the fingers excavate at the tips and a slight basal hiatus between the 

 two. All the segments of the male abdomen distinct. 



Possibly some of the above characters, e. <j. the spiny nature of the carapace and limbs. 



