BORRADAILE— ON THE PONTONIIN^ 385 



9. Coralliocaris atlantica Rathbun, 1901. 



Bull. U. S. Fish Comm. xx. ii. p. 122, fig. 26. 

 St Thomas, 20 to 23 fms. 



10. Coralliocaris camerani Nobili, 1902. 



Boll. Mus. Torino, xvi. xxiii. p. 3. 

 Flamenco I. 



11. Coralliocaris hecate Nobili, 1904. 



Bull. Mus. Paris, 1904, p. 232 ; Ann. Sci. Nat. (9), iv. p. 58, PI. 3, fig. 2 (1906). 

 Jibuti. 



12. Coralliocaris rathhuni n. nom. 



Coralliocaris tridentata, Rathbun, Bull. U. S. Fish Comm. xxiii. m. p. 920, fig. 69, 

 PL 24, fig. 1 (1906). 



Hawaiian Is., 28 to 43 fms. 



13. Coralliocaris truncata Rathbun, 1906. 



Bull. U. S. Fish Comm. xxiii. iii. p. 920, fig. 70, PL 24, fig. 2. 

 Hawaiian Is., 24 fms. 



Subgenus Onycocaeis Nobili, 1904. 



BulL Mus. Paris, 1904, p. 232; Ann. ScL Nat. (9), iv. p. 60 (1906). 



Definition: Dactylopodites with small basal protuberance, with accessory spinules, 

 biunguiculate ; great chela opens vertically, with the thumb above. 



Key to the species of Coralliocaris (Onycoca^'is) : 



I. Rostrum toothless. 



C. (0.) aualitica Nobili, 1904. 



II. Rostrum toothed. 



A. R. =|-. No supraorbital spine. 



C (0.) tridentata Miers, 1884. 



B. R. = ~2 . A supraorbital spine. 



C. (0.) rhodope NobiU, 1904. 



1. Coralliocaris {Onycocaris) aualitica Nobili, 1904. 



BulL Mus. Paris, 1904, p. 232; Ann. Sci. Nat. (9), iv. PL 3, fig. 3 (1906). 

 Jibuti. 



2. Coralliocaris [Onycocaris) rhodope Nobili, 1904. 



Bull. Mus. Paris, 1904, p. 232 ; Bull. Sci. Fr. Belg. xl. p. 49 (1906) ; Ann. Sci. Nat. 

 (9), iv. p. 61, PL 2, fig. 8 (1906). 

 Jibuti. 

 SECOND SERIES— ZOOLOGY, VOL. XVII. 49 



