1922.] S. Kemp: Notes on Crustacea Decapoda. 269 



West Indies does not belong to Coralliocaris ; the dac.tylus of the 

 posterior legs is merely a little swollen and without the large basal 

 process characteristic of the genus. The generic position of C. 

 quadridentata, Rathbun, and C. truncata, Rathbun, 1 both from the 

 Hawaiian Is., also appears to me doubtful. The dactylus of the 

 posterior legs is described as having "an accessory spinule " in 

 the former and " a supplementary spine " in the latter. 



Borradaile {loc. cit., 1917, p. 385) erroneously quotes Miss 

 Rathbun 's C. quadridentata as " C. tridentata " and, as the latter 

 name has already been used by Miers, he substitutes " C. rathbuni, 

 n. nom." In his key to the species, however, C. quadridentata is 

 used . 



The four species which I have myself examined may be 

 separated by the following characters : — 



A. Hepntie spine absent; fi.st legs not remarkably slen- 

 der, with fingers little if at all shorter than palm ; second 

 legs similar in structure. 



R. Outer margin of dactylus of second leg semicircular ; 

 fixed finger with large molar tooth fitting into cavity 

 in dactylus ; ultimate segment of third maxilliped 



more than 3 times as long as wide ; R. 4-6 : 1-2 ... graminea (Dana). 

 B'. Outer margin of dactylus of second leg not convex ; 

 fixed finger with 2 or 3 teeth which do not fit into 

 cavities in dactylus ; ultimate segment of third max- 

 illiped not more than twice as long as wide. 

 C. Rostrum usually with 4 or 5 dorsal teeth and 2 , 

 ventral ; merus of second leg with a series of small 

 teeth at distal end of upper border, dactylus with 

 outer margin abruptly angulate ... .. superba (Dana). 



C. Rostrum with 1 or 2 dorsal teeth and 1 ventral ; 

 merus of second leg unarmed at distal end of upper 

 border, dactylus with outer margin slightly con- 

 cave ... ... ... ... venusta, sp. nov. 



A'. Hepatic spine present ; first legs remarkably slender 

 with palm twice as long as fingers ; second legs dissi- 

 milar in structure ; R. 3-6 : 1-3 ... ... lucina Nobili. 



Coralliocaris graminea (Dana). 



1852. Oedipus gramineus, Dana, U. S. Explor. Exped., Crust. I, p. 573, 



pi. xxxvii, figs. T>a-e. 

 1889. Oedipus gramineus, Pfeffer,' Jahrb. Hamburg, wiss. Ansialt 



11, p. 34. 

 1909. Coralliocaris graminea, Caiman, Proc. Zool. Soc. London, p. 706. 

 1915. Coralliocaris graminea, Balss, Denk. math-naturw. Kl. K. Akad 



Wien XCI, p. 26. 

 1917. Coralliocaris graminea, Borradaile. Trans, Linn. Soc. (2) Zool . 



XVII, pp. 324, 383. 



Other references are given by Borradaile, who— no doubt 

 correctly — includes as a synonym Ortmann's C. inaequalis. The 

 more important specific characters are the following : — 



The rostrum bears from 4 to 6 teeth on its upper margin and 



1 Rathbun. Bull. U. S. Fish Comm. XXIII, iii, p. 920, figs. 69, 70 (1906). 



2 I have not seen this paper. 



