way 
EXPLANATION OF PLATE XI. 
Fig. 49. Coscinodiscus centralis, Ehr. Fig. 53. Campylodiscus angularis, n. sp. 
— 50. Eupodiscus subtilis, n. sp., Ralfs. — 54&54b,... eximius, n. sp. 
— 51, Campylodiscus centralis, n. sp. — 55. : limbatus, Bréb. 
— 52. i Ralfsii (?) Sm. All the above are magnified 400 diameters. 
