74 



BiDDULPHiA WoOLMANil, Kain and Schultze, n. sp. 

 Valve elliptical, with undulating margin caused by from 7 to 

 10 transverse elevations separated by costae, the summits of which 

 are finely punctate, and the marginal inclinations finely striate; 

 processes globular. (Plate LXXXIX. Fig. 3). 

 Cocconema lajiceolatiim, Ehrb. Rare, 

 Coscinodisctis Argus, Ehrb. 

 C. asteromphabis, Ehrb. 

 C. concavus^ Ehrb. 

 C. eccentrictis, Ehrb. 

 C. gigas, Ehrb. 

 C, isoportis, Ehrb. 



C. Lezvisiamts^ Grev. Rare. 

 C lifieattiSy Ehrb. 



C, Notiingkajnenszs, Grun. Rare. 

 C, Octitts Iridis, Ehrb. 



C, perforatus, Ehrb. 



C. radiatuSy Ehrb. 



C. rhomhictis, Castracane. Rare. 

 C. robustus, Grev. 



C Senarliis^ A. S. 

 C. symmetrtczis, Grev. 

 Craspcdodisctis coscinodiscits, Ehrb. 



C* coscinodiscitSy Ehrb., var. Nanhoorensis, Grun. 

 Cymatopleicra Solea, W, Sni. 

 Dicladia capreohis, Ehrb. Rare. 

 DiMEREGRAMMA Nov^-C^SAR^A, Kain and Schultze, n. sp. 

 Valve linear with slight central inflation and acute apices ; 

 striae moniliform, marginal ; intermediate free space broad. (Plate 

 LXXXIX, Figs. I, lb). 



D. NoV^-C.€SAR.EA, van OBTUSA, Kain and Schultze, n. var. 



Valve linear with central inflation and obtuse constricted ex- 

 tremities; stri^ moniliform, marginal, broad intermediate free 

 space. (Plate LXXXIX. Figs. la, ib)* 

 D- fulvum (Greg.), Ralfs. 

 Ethmodisciis} sp.? Fragments of a very large disk are common 



at 550 feet, which probably belong to a species of this new 



genus constituted by Castracane. 



