154 



Pseudorhontóila H. Milne-Edwards is very obscurely known. A long time it contained only a 

 single species, Ps. quadridentata ^), known only by a most incomplete description and never 

 figured, and the habitat of which is unknown. In recent years Miss Raïhbun "') described a new 

 West Indian species, Ps. octodentata^ but again without any figure. 



To Alcock's iiseful memoir it may be again allowed to refer for the discrimination of 

 the genera (p. 297 — 298). 



Carcinoplax H. Mihie-Edwards. 



1833. Curtonotiis (part.) de Haan. Faun. Japon., Crust., p. 21 (praeocc). 

 1852. Carcinoplax H. Mihie-Edwards. Ann. Sc. Nat. (3), t. 18, p. 164. 



The "Siboga" did not secure any representative of this genus, which is the more 

 astonishing, as no less than seven new species have been recently collected by the "Albatross" 

 in Philippine waters and described by Miss R.\thbun. I must restrict myself to the mere 

 enumeration of the species in chronological order. 



1835. C. longiinana (de Haan). Literature: Alcock, 1. c, p. 303. A new subspecies [indica) 

 has been described by Doflein (Wiss. Erg. "Valdivia" Exp., Bd 6, Brachyura, 1904, 

 p. 114, pi. 35, f. I — 2.). The Indian specimens appear all to be referable to this 

 subspecies ; the typical species inhabits Japanese waters. 



1858. C. cbiirjica Stimpson. Proc. Ac. Nat. Sc. Philadelphia, 1858, p. 94. Smithson. Inst., Miscell. 

 CoU., V. 49, 1907, p. 94. Hab. Bonin Islands, in shallow waters. 



1891. C. longipcs (Wood-Mason). Literature: Alcock, 1. c, p. 303. Doflein, 1. c, p. 117. 

 Hab. Travancore coast, Andamans, Nicobars, in depths of 400 — 785 metres. 



1914. C. bispinosa Rathbun. Proc. U. S. Nat. Mus., v. 48, 1914, p. 137. Hab. Philippine waters, 

 in 90 fathoms. 



19 14. C. spinossissivia Rathbun. Ibid. p. 139. Hab. like the preceding, in 165 fathoms. 



1914. C. coiifragosa Rathbun. Ibid. p. 140. Hab. like the preceding, in 127 fathoms. 



19 14. C. purpicrea Rathbun. Ibid. p. 140. Hab. like the preceding, in 90 fathoms. 



1914. C. angiista Rathbun. Ibid. p. 142. Hab. like the preceding, in 90 fathoms. 



19 14. C. verdensis Rathbun. Ibid. p. 143. Hab. like the preceding, in 394 fathoms. 



19 14. C. speciilaris Rathbun. Ibid. p. 143. Hab. like the preceding, in 159 fathoms. 



Pilumnoplax Miers. 



1886. Pilumnoplax Miers. Rep. ''Challenger", Brachyura, p. 225. 



Nee Pilumnoplax Stimpson. Proc. Ac. Nat. Sc. Philadelphia, 1858, p. 93. 



This genus was established in 1858 to receive four species: sidcatifrons, longipcs, scnipta 



i) Hist. Nat. Crust., t. 2, 1837, p. 59. 



2) Proc. BioL Soc. Washington, v. 19, 1906, p. 91. It is indeed disappointing to find, how this author at every time misses 

 the opportunity of filling up the gaps and incompletenesses in carcinological literature and, I am sorry to say, frequently adds to the 

 existing confusion. Obscure species, the systematic place of which is even often uncertain, are passed by with hardly any comment what- 

 ever; new species are rapidly glanced over, her descriptions take the ferm of short notes, hurriedly thrown down, and figures are either 

 not at all given, or, if so, are often dispensed with by photographs, which, in many cases, leave one unsatisfied about essential features- 

 gnorinous productivity of work is by no means always associated with painstaking exactness. 



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