154 



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

 single species, Ps. qnadridentata^\ known only by a most incomplete description and never 

 fio-ured and the habitat of which is unknown. In recent years Miss Rathbun ") described a new 

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



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

 the genera (p. 297 — 298). 



CarcinoplaX H. Milne-Edwards. 



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

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



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

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

 in Philippine waters and described by Miss Rathbun. I must restrict mj^self to the mere 

 enumeration of the .species in chronological order. 



1835. C. /ongimana (de Haan). Literature: Alcock, I.e., p. 303. A new subspecies {indica). 



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



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



subspecies; the typical species inhabits Japanese waters. 

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



Coll., v. 49, 1907, p. 94. Hab. Bonin Islands, in shallow waters. 

 1 89 1. C. longipcs (Wood-Mason). Literature: Alcock, I.e., p. 303. Doflein, I.e., p. 117. 



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

 1914. C. bispinosa Rathbun. Proc. U.S. Nat. Mus., v. 48, 19 14, p. 137. Hab. Philippine waters, 



in 90 fathoms. 

 1 9 14. C. spinossissvna Rathbun. Ibid. p. 139. Hab. like the preceding, in 165 fathoms. 

 1 9 14. C. confragosa Rathbun. Ibid. p. 140. Hab. like the preceding, in 127 fathoms. 

 1 9 14. C. purpurea Rathbun. Ibid. p. 140. Hab. like the preceding, in 90 fathoms. 

 1914. C. angitsta Rathbun. Ibid. p. 142. Hab. like the preceding, in go fathoms. 

 1 914. C. verdensis Rathbun. Ibid. p. 143. Hab. like the preceding, in 394 fathoms. 

 1914. C. spccularis Rathbun. Ibid. p. 143. Hab. like the preceding, in 159 fathoms. 



Pilumnoplax Miers. 



1SS6. Filiunnoplax 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: sidcatifroiis, longipes, scidpta 



1) 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 t.ike the form 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. 

 ;.inormous productivity of work is by no means always associated with painstaking e.vactness. 



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