Family NEPHROPSIDAE. 



The six species, obtained by this expedition, belong to the genera Nephrops Leach and 

 Nephropsis W.-Mas. : two of the three species of Nephrops proved to be new to science. Of the 

 nine genera, included at present in this family, Etitrichocheles W.-Mas., Homartis H. M.-Edw., 

 Homoriscus M. J. Rathbun, Eunephrops S. I. Smith and Thaitmastocheles W.-Mas. have not 

 been observed in the Indian Archipelago. The genus Homarus H. M.-Edw. is represented by 

 three species, the european and the american Lobster and by a third which seems to be confined 

 to South Africa. Ettnephrops S. I. Smith and Homoriscus M. J. Rathbun are only known from 

 the West-Indies, of the two species of Thaiimastochelcs one likewise inhabits the Caribbean Sea, 

 the other the coasts of Japan. Of the only species of Eutrichocheles, finally, but two specimens 

 have hitherto been taken : the specimen on which this genus was founded by Wood-Mason, 

 was probably captured in the Bay of Bengal or on the coasts of India, the other, described by 

 Herbst in i 794, should have been taken in the East-Indies, so that this extremely rare form will 

 probably once prove to occur also in the Indian Archipelago. Of the four or probably only three 

 species of the genus Enoplometoptis A. M.-Edw. two occur in the Indian Archipelago. Of the 

 two species of Phoberus A. M.-Edw., Phoberus tenuimamis Sp. Bate, which is regarded by Col. 

 Alcock as a variety of the West-indian PJwb. caecus, was taken by the "Challenger" in the 

 Arafura Sea. Besides the three species of Nephrops, obtained by the "Siboga", still a fourth will 

 probably prove to occur in some parts of the Archipelago, viz. Nephrops Thomsoni Sp. Bate, a 

 species recorded from the Philippine Islands and from Formosa. Of the genus Nephropsis, finally, 

 three species are now known to inhabit the Indian Archipelago, a fourth, N. Ca rp 'e n ter i W . -Mas., 

 does no doubt also occur there, this species being known both from the Bay of Bengal 

 and Japan. 



