The three following species occur between 500 and 800 fathoms : — 



Pnromolopsis Boasi 597 fraa. 

 Ethusa indica 719 „ 



Scyramathia pulchra 561 „ 



The following 18 species occur between 400 and 500 fathoms. 



Homola profundorum 430 fms. 



< Hypsophri/s Icngipes 430 „ 



9 "3, I 



Bandallia pusiulosa 406 



c e / - - . - , . 



"^ Arachnodromia Baffini 430 



>^ < Cymonomops glaucomma 405 



O ^ Lyreidus Channeri 406 



fPhysachaeiis ctenurus 406 



„• I Cv^'t omnia Suhmi 430 



^ 



-{ Platyviaia Wyville-Thomsoni 405 ,, 



O Encephiloides Rivers- Andersoni 406 „ 



\^ Scyramathia Bivers- Andersoni 406-430 „ 



tl ( Trachycnrcinns glaucus 430 ,, 



j^ ) Benthochuscoit Hemingi 406 „ 



fCarcinoplax longipes 430 „ 



P Pilumnoplax Sinclairi 430 „ 



3 -^ Psopheticus stridulans 419 „ 



O I HeplitJiopelta luguhris 490 „ 



[^Pinnoteres ahyssicola 430 ,, 



Thus rather more than half the species of Indian deep-sea crabs have been 

 taken only in depths between 400 and 100 fathoms. Moreover, a good many 

 of the species that range into the greater depths mentioned above also occur 

 in shallower water. 



On the other hand, with the single doubtful exception of Dodea uvw, we 

 have no instance of a true shallow-water crab being taken so far out as the 

 himdred-fathom line. 



The majority of the species here described have already been noticed either 

 in the Annals and Magazine of Natural History or in the Journal of the Asiatic 

 Society of Bengal, and a good many of them have been figured in the Illustrations 

 of the Zoology of the Investigator. 



My predecessor, Professor J. Wood-Mason, was the author of the first 

 published notices and figures,— in the Journal of the Asiatic Society of Bengal, 

 for 1887, pt. 2, pp. 206-209, pi. i, in the Annals and Magazine of Natural Ewtory 

 for March, 1891, pp. 258-270, fig. 5, and in the Illustrations of the Zoology of 

 the Investigator, 1892, Crustacea, pi. v, in which contributions fourteen valid 

 new species and seven new genera are included. 



\ 



