EXPLANATION OF PLATE 1. 



ACERVULARIA ADJUNCTIVA. 



Fig. 1, ii small cluster of corallites, natural size. Fig. 2, transversf shcuou of the 

 Bime. Fig. 3, vertical section of a single corallite. 



LECYTHIOCRINUS OLLICUL^FORMIS. 

 / 



Fig. 4, .'♦ide view of body enlarged to 1^ diameters. Fig. o, diagram of the same, in 

 the same proportions. 



ERISOCRINUS PLANUS. 



Fig. (i, bawal view of body, uatnral size. Fig. 7, view of oval side of the .same. 

 Fig. 8, similar view of the Poieriocrimis hemisphericus Shnmard, for comparLsou. 



CYATHOCRINUS STILI.ATIVUS. 



^ Fig. 9, side view of calyx, natural size. Fig. 10, basal view of the same. 



UIIODOCRINUS VESPERAXIS. 



*' Fig. 11, side view of the body, natural size. Fig. \2', basal view of the s;aue. 



ARCH^OCIDARIS DLNINNII. 



•^ Figs, 13, 14, and 15, views of different spines. 



