382 PERCY SLADEN TRUST EXPEDITION 



Subgenus Coralliocaris s. str. 



Definition : Dactylopodites with well-developed basal protuberance, without acces- 

 sory spinules, not biunguiculate ; great chela generally opens horizontally, or has the 

 thumb below. 



Key to the species of Coralliocaris s. str. 



I. Rostrum toothless. 



A. Rostrum reaches only to middle of first joint of antennule. Antennular 



stalk reaches middle of antennal scale. 



C. brevirostris Borradaile, 1898. 



B. Rostrum outreaches first joint of antennule. Antennular stalk nearly reaches 



end of antennal scale. 



C. nudirostris (Heller), 1862. 



II. Rostrum toothed. 



A. Rostruin bears no teeth below. 



1. Rostrum bears only one tooth above. 



C. macrophthalma (H. M.-Edwards), 1837. 



2. Rostrum bears 4 — 5 teeth above. 



a. Rostrum curved upwards. Eyes subspherical. 

 C. atlantica Rathbun, 1901. 



h. Rostrum not curved upwards. Eyes subcylindrical. 



i. Rostrum straight, reaching middle of second joint of antennule. Great 

 chela opens vertically. 



C. hecate Nobili, 1904. 



ii. Rostrum bent downwards, reaching end of second joint of antennule. 

 Great chela opens horizontally. 



C. quadridentata Rathbun, 1906. 



B. Rostrum bears one or more teeth below. 



1. Rostrum bears only one tooth above. 



C. camerani Nobili, 1902. 



2. Rostrum bears 4 — 6 teeth above. 



a. Second legs subsimilar (often unequal). 



i. Moveable finger not of great width or very much curved. 



a. Rostrum rather deep. Great chela not long or much swollen at 



base. 



C. truncata Rathbun, 1906. 



