370 ME. J. E. HENDEKSON — A CONTEIBUTION 



Distribntioti. Sandwich Is. {A. IlUne-Echcords) ; Am Is. (3Iiers) ; Amboina (De 



Man). 



96. Neptunus akmatus, A. Milne-Edw. 



N. annatus, A. Milne-Edwards, Nouv. Arch. Mus. Hist. Nat. t. x. ]). 322, pi. xxxiii. fig. 2 (1861). 



Rameswaram, five specimens {J. B. M.). 



The types of this species are preserved in the British Museum. The surface of the 

 carapace is finely granulated, and the lateral spines are strongly developed, though some- 

 what shorter in my specimens than in the types. The outer surface of the carj^us and 

 propodus of the chelipedes carries a series of finely granulated ridges, with the inter- 

 vening surface smooth; two fainter ridges are seen on the inner surface of the propodus. 

 The fingers, with the exception of their tips, are dark in colour, and there is a well- 

 defined black spot on the inner su.rface of the palm near the insertion of the dactylus ; 

 the first tooth of the dactylus, as in so me other Portunids, is enormously developed. 



The carapace of the largest specimen is 17 mm. long and 30-5 mm. broad, not in- 

 cluding the lateral spines, which are each about 5 mm. long. A. Milne-Edwards gives 

 the length as 13 mm. and the breadth as 50 mm., but reference to the types and to his 

 figure shows that there is some mistake, probably in the length noted. 



BistrUmtion . West xUistralia {A. 3£ilne-Edwards). 



97. Neptunus Sieboldi, A. Milne-Edw. 



N. Sieboldi, A. Milne-Edwards, Noaiv. Arch. Mus. Hist. Nat. t. x. p. :32.3, pi. xxxv. fig. 5 (1861). 



Muttuwartu Par, a male {Thurston). 



This species may be recognized by its foiu- similar, subobtuse frontal projections, the 

 short lateral spines of the carapace, the unarmed hinder margin of the merus of the 

 chelipedes, and the strongly ridged hand, the ridges being seen even on the inner surface. 

 In the Muttuwartu specimen, the median notch or fissure of the front is deeper and 

 narrower than the one on either side, whereas in A. Milne-Edwards's figure they are 

 equally deep and narrow. 



The carapace is 12 mm. long and 18 mm. broad. 



Distribution. Mauritius {A. Milne- Edwards, Miers). 



Genus Xiphonectes, A. Milne-Edw. 



98. Xiphonectes longispinosus (Dana). 



X. longispinosus (Dana), Miers, 'Challenger' Brachyura, p. 183 (1886), ubi synon. 

 { — X. leptocheles, A. Milne-Edw.; Amphitrite vigilans, Dana). 



Gulf of Martaban, a male and a female (Gates). 



The genus founded for the reception of this variable species comes very near to 

 Neptunus, and perhaps the two should be united. The larger specimen (female) is 07 mm. 

 long and 9*5 mm. broad. 



Bislrihutiou. Erom the Seychelles to the Pacific (New Caledonia, Tongatabu, &c.). 



