2 



Pago. 

 Raphistoma acuta 235 



Fig. 20. Profile of a specimen, showing the elevation of the spire. 

 21 and 22. Upper and lower surfaces of the same individual. 



Cyrtolites sinuatus 237 



Figs. 23-24. Lateral and profile views of a specimen, showing the features of the shell. Enlarged. 



FusrspiRA compacta 236 



Fig. 25. View of ihe specimen described, which is imperfect at both ends; the outline shows 

 the probable form of the anterior end. 



Agnostus Neon 229 



Figs. 26-27. View of the cephalic and caudal shields, greatly enlarged, showing the features 

 as seen on the specimens. 



Agnostus communis 228 



Fig. 28. View of the cephalic shield, greatly enlarged, showing the peculiar form of the glabella 

 and the spine on its center. 

 29. Caudal shield. Enlarged, 



Agnostus peolongus 230 



Fig. 30. The cephalic shield, greatly enlarged, showing the great length and obscurely-marked 

 glabella. 

 31. View of the caudal shield associated with the above cephalic shield. 



Agnostus tumii'Osus 231 



Fig. 32. View of the cephalic shield, with its peculiar and tumid glabella. Greatly enlarged. 



Bathyup.us Pogonipensis 243 



Fig. 33. View of the pygidium described, showing the form and character of ribs, and the orna- 

 menting granules ou the axial rings. 

 34. Profile of the same, showing the elevation of the specimen. 



IKELLOCEpffALUS »WAHSATCnENSIS 241 



Fig. 35. View of the glabella and one fixed cheek. The wider depressions on the glabella are 

 . accidental depressions on the glabellar lobes. 



^^JUV-vJt- ^^y^ sUKH^eE l'HAb U tr^ a UT l ll CUS 242 



Fig. 36. View of a pygidium, showing the peculiar character of the ribs of the lateral lobes. 



yFig. 36. View of a 

 D n ti i. LL CEiTr.vnj5 qua 



D n tl !. LL O CEI^VH»y QUADRICEPS 240 



Fig. 37. Enlarged view of the glabella and fixed cheeks, showing the peculiar form of the 

 glabella and short frontal limb. 



38. Profile of the same, showing the elevation of parts. 



39. View of the pygidium, natural size. 



40. Profile of the same, showing the great elevation. 



