121 



from surface view scarcely distinguishable from the pillars of the 

 same. Tertiaries not so exsert and narrower, generally with 

 three paliform lobes to each, decreasing in breadth but in- 

 creasing in height and sharpness towards the centre of the 

 calicle. Quaternaries very narrow, but quite distinct. 



Columella shallow, three or four fine-pointed spines, quite 

 similar to and possibly formed by the inner pali of the larger 

 septa. 



Height, 17 mm.; diameter of calicle, 15*5 mm.; of broken 

 base, 3' 5 mm. 



o 



E., i8i 



Locality. — 230 fathoms, Vasco da Gama, N. 

 miles, stones. 



I have described the single specimen somewhat minutely, be- 

 cause I cannot be sure what are really its specific characters. It 

 is just possible that it may be the same as D. barhadensis, 

 Pourtales, if one supposes that the specimens, on which that 

 species was founded, were of slow growth, and so came from 

 an unfavourable environment, while the Cape specimen came 

 from a peculiarly suitable one. 



Genus CYATHOCERAS Moselev. 



The genus differs only from the last in the fact that the 

 columella is formed by twisted processes, not straight rods, and 

 that there are no paliform lobes. 



15. CYATHOCERAS CORNU (Moseley). 



C. cormi, Moseley, Challenger Report, p. 156, pi. IV., figs. 7, 7a 

 (1881). 



Three specimens (1-3), 310 fathoms, Buffalo River, N., 15 

 miles, coral and mud ; and one (4), 330 fathoms, Vasco da 

 Gama, N. 71° E., i2\ miles, stones. 



