PLATE M A.— Coiuiuucil. 



Dalmanites (Chasmops) macrops. 



Page 68, 

 Fig-. 14. An imperfect cephalon, showing the .character of the glabella, the coalesced lateral lol.es. and the 



verj prominent eye. This is the type specimen. 

 Fig. ir>. Profile view of the same, showing the size and elevation of the eye. 

 Corniferous limestone. Schoharie, Schoharie county. 



Dalmanites (Chasmops?) Eiuna 



l'a,i;o 67. 



Fig. 16. A pygidium preserving symmetry of funn and showing the flat annulations and broad bqrder. 

 Fig. 17. Profile view of the same. 



Corniferous limestone. Clarenct Hollow, ErU county. 

 Fig. is. A larger pygidium, somewhat unsymmetrica] in outline on account of the unequal width of the 

 border. 



Corniferous limestone. Fmui a boulder in tin toirii of Naples, Ontario county. 



Dalmanites (Chasmops) Calypso. 



Page 64. 

 Fig. 11'. An entire individual, drawn from a gutta-percha impression of a natural mould of (lie dorsal sur- 

 face; showing the general form and proportions, the coalesced glabellar lobes, the relatively 

 large eyes, and the axial row of flattened spines on the pygidium. 

 Fig. 20. Profile of the same showing the elevation of the body and the height of tin- pygidial spines'. 



Fig. 21. An hy post oma found in place with the foregoing speci n, somewhat imperfect on its posterior 



extremity, but showing its general character. 



Corniferous limestone. Sandusky, SanoVusky county, Ohio. 

 fig. 22. An imperfect pygidium, the type of the species. The drawing does not show the characteristic 

 angularity of the axis. 



i irniferous limestone. Falls of the Ohio. 



Dalmanites (Hatjsmannia) piiacopty.x. 



l'age 31. 

 Fig. •-•:;. A fragment of a pygidium, natural size, showing the prominent caudal ridge ami spine, and the 

 acute tubercles ami spinules covering the surface. The drawing is made from a guttapercha 

 impression of a natural mould of the dorsal surface. 

 Fig. 24. Pii file of the same specimen, with the caudal spine drawn in its normal position, and showing- the 

 conspicuous spinules upon the annulations. 



Upper Helderberg limestone. North Cayuga, Provinei of Ontario. 

 Pig. 25. A portion of the right side of a pygidium, drawn from a cast of the lower surface of the tost. 



Upper Helderberg limestone. North Cayuga, Provinei of Ontario. 

 Fig. 26. A portion of the loft side of a pygidium, showing the normal curvature ami the bifurcate character 

 of the annulations. 



Upper Helderberg limestone. North Cayuga, Province of Ontario. 

 Fig. 'J7. A large hypostoma found m association with the pygidia of this species. 



Upper Helderberg limestone. North Cayuga, Province of Ontario. 



Dalmanites (Hausmannia) Meeki. 



Page 32. 



Fig, 28. The glabella, showing the . of its lobation. 



Fig. -'.'. Dorsal view of a pygidium, showing the number of annulations and character of the caudal spine. 

 Fig'. 30. Profile view of the same specimen, showing the elevation of the caudal spine. 

 Tin- above illustrations are from the type specimens of the species. 

 Lower Devonian limesf ■■ Eureka District, Nevada. 



