77 
septa. The specimen identified by Duncan as T. arguta Reuss is 
precisely the same thing. It also has perfectly distinct 
septal perforations, and there are hints of columellar papillae. 
This genus, I think, is most closely related to -Freeh la 
Gregory, hut can he immediately separated hy its highly developed 
dissepiments. The genus seems to he unusually distinct from 
any of those previously described. 
S. Genus LITHOSERIS Koby 
/ 
1886. Lithoseris , SchwK^s. palaeontol. Gesellsch., Ahhand., Bd, 
xi i i , p . 3* 
Generic diagnosis : "Coraf lu^Ksimple , more or less elevated 
and turbinate. Septa numerous, crowded, little compact (peu 
compactes), free margin divided into irregular granulations, 
septal faces covered with irregular granulations • ^^^^ella 
spongy, prominent. Epitheca complete. Pseudo-synapticula 
numerous 
Dissepiments rare 
