Genus A1ITILL0SERIS hot. 
1873* Turbinoseris , Duncan, Quart. Jour* Geol. Soc* London, vol. 
xxxix, p. 558. 
1884. Turbinoseris ( Partim ) , Duncan, Jour. Linn. Soc. London, 
Zool., vol. xviii, p. 148. 
1899. Turbinoseris , Vaughan, Bull. Mus » Comp. Zool., vol. 
xxxiv, p. 243. 
Generic diagnosis i Corallum simple, cuneiform, or de- 
pressed, may be discoid, base narrow. Fo epitheca. Wall 
perforate, synapticulate • Costae present as the distal termi- 
nations of the septa. Septa solid, septal margins dentate 
(dentations rounded in the type species), septal faces granu- 
late. In cross-section, the granulations usually are directed 
/ 
inward and hooked. Synapticula out of the thecal ring rare; 
dissepiments appear to be entirely absent. Columella, strictly 
speaking, absent. When the more perfect calices are viewed 
from above, a narrow furrow is seen to occur in the axis; a thin 
