PLATE XXXII K— Continued. 



COLEOLUS ? GRACILIS. 

 Page 190. 

 Fi^. 19. A fi-.ij,'ment of an iDdividual, showing the ordinary form and the natural curvature of the shell. 



HyoLITHES TEILIttATUS. 



V*ge 401. 



Fig. 20. The doi-sal side of an imperfect individual, imbedded in the rock, showing a double groove along 



the dorsal angle. 

 Fig. 32. A large individual, showing a distinct groove along the doi-sal angle, with the lateral angles crushed, 

 and the shell partially separated. 



Htolithes ACLIS. 



Pago 197. 



Fig. 21. The ventral side of a small individual, which is compressed near the margins, and the sides par- 

 tially separatcl at what ap]ie«r to he, the suture lines (= var. peiahridea). 



Fig. 23. The venti-al side of a specimen preserved in the coarser shale, and showing longitudinal stride very 

 distinctly near the lower margin. 



Fig. 24. The inner surface of the shell on the ventral side, showing the longitudinal and transverse striae, 

 and also the longitudinal lines of apj>ai-ent fracture from compression (= var. petalmdea). 



Fig. 25. An enlargement of an operculum, supposed to belong to this species, showing the surface characters 

 more in detail than figure 27 of plate 32, 



„,94;jl-WHE8 STEIATnS. ._,^ . 

 Page 199. 

 Fig. 26. An enlargement of an operculum, soppooed to belong to'ibie. species. 



Htolithes sinqulus. 



Page 202. 

 Fig. 27. The lower part of an individual of thia species, showing the character of the surface-markings, and 

 obtusely triangular forui of the shell. 



Clathrocoilia eborica. 



Page 204. 

 Fig. 28. The exixsed flat side of a 8[)ecin>en, showing the arching and recurved septal markings, with some 



(if the longitudinal striie. 

 Fig. 29. A larger indivi<lual than the preceding, showing the arching, septal markings and the longitudinal 



sti-iii-. The shell, in the lower part, is ci-ushed, and appears to be separated in distinct arching 



laminar rings. 



