1910] Kofoid: A Revision of th Genus Ceratocorys. 183 



The new species. C magna, is plainly more nearly related to 

 C. armatum than to C. horridum, that is to the section of the 

 genus with short spines rather than to the long-spined ones. 



Reported thus far only from the tropical Atlantic, by .Murray 



and Whitting (1899). 



Ceratocorys bipes (Cleve) Kofoid. 



Goniodoma (?) bipes, Cleve (1903), p. 371, fig. 2. 



Ceratocorys ( .') asymmetrica, Karsten (1907), p. 419, pi. 17, fig 9 a-d. 



The general form of the body of this medium-sized species is 

 very characteristic. It lacks the angular features of C. armatum 

 and horridum. The nearly circular girdle is far anterior; the 

 epitheca is low and dome-shaped, and the hypotheca is laterally 

 compressed posteriorly somewhat as in Phalacroma, while the 

 antapical region hears in the sagittal plane two large constricted, 

 bulbous enlargements, one placed at the posterodorsal angle of 

 the antapical plate, and directed posteriorly and the other at the 

 postero-ventral angle but directed at an angle of 45° from the 

 major axis. Each bears a short, conical, terminal sheathed spine 

 without brush. The whole surface is regularly pitted, but there 

 are no fins alone- the sutures and the girdle-lists are low. 



Reported thus far only from five localities in the Red and 

 Arabian seas by Cleve (1903) and once from the Indian Ocean 

 by Karsten (1907), who correctly, though with hesitation, assigns 

 it to the proper genus but evidently did not know of Cleve 's 

 earlier figure and description. 



Ceratocorys jourdani (Gourret) Kofoid. 



Dinophysis jourdani Gourret (1883), p. 79, pi. 3, fig. 55. 

 Dinophysis armata, Daday (1888), p. 193, pi. 3, fig. 6. 

 Phalacroma jourdani, Schiitt (1895), p. 64, pi. 4, fig. 20 ,- 4 . 

 Ceratocorys horrida (encysted), Murray and Whitting (1899), p. 329, 



pi. 30, fig. 56. 

 Phiilticrnnia Jourdani, Entz (1902), p. 130, figs. 6-S; (1905), p. 113, 



figs. 1-4. 

 Phalacroma Ceratocorys, Entz (1902), pp. 135-144, figs. 26, 33; 



(1905), pp. 120-127, figs. 22-28. 



The body of this small species bears in lateral view a striking 

 resemblance to Phalacroma. The girdle is far anterior and has 



