Pagp. 



Kapiiistoma acuta 235 



l"ig. 20. Profile of a specimen, showing the cliivation of tbe spire. 

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



Cyktoi.ites sinuatus 237 



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



FUSISPIRA COMPACTA 236 



■ Fig. 2."). View of the specimen described, which is imperfect at both ends; the outline shows 

 the probable form of the anterior end. 



AdXOSTUS Nkon 229 



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

 as seen on the specimen-s. 



AONOSTUS COMMtlNtS 228 



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

 and the spine on its ceuttr. 

 29. Caudal shield. Enlarged. 



Agnostus prolongus 230 



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

 glabella. 

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



Ag.no.stus tumii'OSus 231 



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



Hatiiyurus Pogonipknsis 243 



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

 menting granules on the axial rings. 

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



UlKELLOCEPHALUS WAnSATCHENSIS 211 



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

 accidental depressions on tlie glabellar lobes. 



DlKKLLOCEPHALUS? GOTHICU.S 212 



Fig. 36. View of a pygidium, showing the peculiar charactc^r of the ribs of the lateral loljes. 



DiKELI.OCEPIIAI.US QUADRICEPS '. 210 



Fig. 37. Enlarged view of the glabella and fixed cheeks, showing tbe 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 tbe same, showiug tbe great elevatiou. 



