PLATE 41. 
1. 579. 1., Homocrinus parvus. (Pag* 185.) 
1 a. An individual, natural size, with a portion of the column attached. 
1 b. The head and arms of another individual. 1 c. The specimen fig. 1 b enlarged. 
1 d. A figure showing the structure and form of plates. 
1 e. A part of one of the arms enlarged. 1 /. A portion of the column of 1 a enlarged. 
2. 3. 5S0. 2. Homocrinus cylindricus. (Pag* 186.) 
2 a. The body and part of the column, natural size. 2 b. An enlarged portion of the column. 
2 c. The structure, showing the single intercalated plate, and the division of the succeeding scapular plate. 
3 a. The body of an individual somewhat more rotund than the preceding, showing the same general structure. 
3 b. The base of the specimen which has one of the larger joints adhering, showing the central articulating 
portion, while the outer portion of the face is smooth. 
3. c. A figure showing the structure of the specimen. 
4. 581. 1. Glyptoraster brachiatus. (P a g* 187.) 
4 a. The specimen as it appears on the surface of a slab of shale. 
4 b. A part of one of the arms enlarged, showing more distinctly the arrangement of the plates of the arms. 
