PAGK. 



Orthodesma subovai.e, . . .22 



Fig. 18. View of a large specimen. 

 Tellinomya cingulata 23 



Fig. 19. View of left valve. 



19a. Interior of the same valve. 



NUCULITES YOLDIAFORMIS, 24 



Fig. 20. View of left valve. 



PrERINEA MUCRONATA, 24 



Fig. 21. View of the interior of a left valve. 



,Cleidophorus ELLIPTICL'S, . . 25 



Fig. 22. View of the left valve. 



Cleidophorus major, 25 



Fig. 23. View of a east of tlie interior, showing the anterior and posterior 

 museuliir scars. 



Ropalonaria venosa 26 



Fi-f. 24. View ot a specimen growing npon a Streptelasma. 

 24a. A porlion of same magnified to 3 diameters. 



Ch^tetes compressus, 27 



Fig. 25. Outline view of a frond of this species. 



25a. A portion of tlie surface enlarged to 6 diameters. 

 25b. Longitudinal section enlarged to 53^ diameters. 



FiSTULIPORA FLABELLATA 28 



Fig. 26. View of an entire(?) specimen. 



26a. A portion of the surface enhirged to 6 diameters. 

 266. Longitudinal section enlarged to 6 diameters. 



INOCAUUS ARBUSCIILA, 28 



Fig. 27. View of a small and entire example. Natural size. 

 27a. A part of same enlarged to 6 diameters. 



Crateripora lineata, 29 



Fig. 28. A si»ecimen of the usual form and dimensions. 

 28a. A portion of same enlarged to 8 diameters. 



Crateripora erecta, 30 



Fig. 29. View of a specimen of the medium size. 

 29a. One half of same enlarged to 8 diameters. 



PLATE VIII. 



Fig. 1. Poteriocrinus wetherbyi — Natunil size, 36 



la. Anterior view, sliowing azygos interradials. 



16. magnified viewof part of tlie proboscis, showing pectinated edges of plates. 

 Fig. 2. Eupaciiycr[NOS spartarius— Anterior view, 38 



2a. Posterior view. 



Fig. 3. EuPACHY'CRiNOS GERMx\NUS — Natural size, 40 



Fig. 4, Lepidestiiesformoslis— Magnified two diameters, ... .41 



The following are figured by Prof. A. G. Wetherby: 



Figs. 5 and 6. Views of interradial and axillary areas of Eucalyptocrinus crasSUS, 



showing the position of the arm-pores, and the base of the vault. Dr. R. 



M. Byrnes' collection. 

 Fig. 7. Cast of interior of same species, showing processes for articulation of arms, 



and the axillary and interradial processes. Prof. Wetherby's collection^ 

 Fig. 8. View of the summit of same species. Prof. Wetlierby's collection. 

 Fig. 9. View of summit or cap-piece of vault of Pterotocrinus, showing upper side 



of same, and the to]) of the radiating canals communicating with the 



interior. Prof. Wetherby's collection. 

 Fig. 10. Lateral view of the vault of Pterotocrinus, showing arm-jiores, grooves 



for the articulation of the inlcr-brachial rays, and the hooked processes 



at the bas(> of the grooves. Prof. Wetherby's collection. 

 Fig. 11. Radial diagram of Pterotocrinus depressus, Lyon and Casseday. From 



specimen in Prof. Wetherby's collection. 

 Fig. 12. Transverse section of vault of Pterotocrinus, Sp., showing arm-pores 



communicating with interior cavity, and the canal extending to the 



summit of the vault. Prof. Wetherbv's collection. 



