PLATE XX. 



Pentaceros BULBiEERus, Fovhes, sp. (Page 77.) 



From the Upper Clmllc. 

 Fig. 



1. Abactinal view ; natural size. (Coll. Brit. Mus., 40175.) 

 a. Plate from dorsal part of disc ; magnified 3 diameters. 



h. Supero-marginal jjlate ; magnified 3 diameters. 



c. Plate from dorsal part of disc ; magnified 2 diameters. 



2. Abactinal view of two specimens ; natural size. (Coll. Brit. Mus., 48748.) 

 a. Madreporite ; magnified (J diameters. 



J). Proximal supero-marginal plate ; magnified 4 diameters. 



