180 University of California Publications in Zoology. [Vol. 6 



2. Spines nearly in median sagittal plane, outline of body rounded 



jourdani (Gourret) 



3. With rounded prominences at base of two short posterior spines 



bipes (Cleve) 



3. Without rounded prominences 4 



4. Resembling C. horrida in form but without long spines, very large, 



exceedingly rugose - , magna n. sp. 



4. Resembling Goniodoma in form and size, smaller, rugose 



armatum (Schiitt) 



Ceratocorys horrida Stein 



C. horrida, Stein (1883), p. 20, pi. 6, figs. 4-11. 



Ceratochorris tridentata, Daday (1888), p. 103, pi. 3, fig. 3. 



Ceratocorys spinifera, Murray and Whitting (1899), in part, p. 329, 

 pi. 30, fig. 6c. Their figures of C. spinifera 6a, 6b, 6e are 

 hitherto undescribed species of Gonyaulax (G. ceratocoroides 

 n. sp.) and figure 6(7 is another species of Ceratocorys (C. 

 inn find n. su.'i. 



Ceratocorys horrida forma tridentata, Entz (1902), p. 139, fig. 33. 



C. horrida var. longicornis, Lemmermann (1899), p. 360. 



C. horrida var. africana, Karsten (1907), p. 419, pi. 52, figs. 1-3. 



Characterized by 5-10 long, spreading, stout spines from 

 hypotheca, four of which arise from angles of antapical plate, 

 one in the left ventral fin and the others along the postcingular 

 sutures. These spines have a dense axial core with short riblets 

 radiating on all sides within a hyaline shaft, giving it a pinnate 

 appearance. Both epitheca and antapex are flattened, the latter 

 obliquely from right to left. Girdle-lists very wide. Fins de- 

 veloped toward base of spines. Varies greatly in degree of 

 development of spines, fins, and ribs in fins, from the short-spined 

 forma tridentata of the Adriatic and Naples to the long-spined 

 forma longicornis of tropical waters. The short-horned form 

 originally described by Daday (1888) is hardly recognizable as 

 ;i Ct ratocorys; but as Entz (1902) figures a short-homed form as 

 '•('. horrida (C. tridentata Daday)" which is plainly a Cerato- 

 corys, and since Daday 's text states quite clearly the distinction 

 between the species figured by Stein 1 1883) and his tridi ntata, 

 we may conclude that Daday 's name is available. This short- 

 horned form and also the long-horned one described by Lemmer- 

 mann (1899) and later by Karsten (1907) are in my opinion 



