PLATE XXV— Continued. 



Proetus Phocion. 



Page li5. 

 Fig. 9. A very imperfect enrolled specimen, retaining the crust, showing the broad sulcate border ami the 

 flattened, sharply ridged cheek. 



Hamilton group. In.li.ni Cove, Gfasp&, Provinei of ',""'" 

 Pig. It). The type specimen : an entire individual preserved as an internal nasi, showing the relatively 

 stoul body, the shaiply ridged cheeks and the sparsely annulated pygidium. 

 Hamilton group. Indian Cove, Cfaspi, Provinei of Quebec. 



Phaethonides cyclukus. 



Page 137. 

 See plate 24. 

 Fig. il. The intra-sutural portion of the ceph&lonj showing fcnle character of tin' surface ornamentation. 

 Lower Helderberg group. Near Clarksville, Albany county. 



PlIAETHONIDES ARENICOLIS. 

 Page 134. 



Fig. 12. An imperfect pygidium, enlarged to three diameters, showing th inspicuous axis, the marginal 



spinules and the liases of other spinules on the annulations 

 Schoharie grit. Schoharie county. 

 Fig 13. A larger pygidium, preserved as an internal nasi and referred with much hesitation to this species. 

 Enlarged to two diameters. 



Upper Helderberg limestone. North Cayuga, Province of Ontario. 



PliAETHONIDESS (?) DENTICULATUS. 

 Page 139. 

 Fig. 14. A portion of the cephalon, shewing the Proetoid glabella with its distanl lateral furrows. 

 Fig. 15. The pygidium which is taken as the type form of the species. 



These figures are reproduced from the original engravings (U. S. Geol. Expl. Fortieth Parallel, 

 pt. 1. Palaeontology, pi. I, figs. 10 and 10a), and are enlarged to about one and one-half diam- 

 eters. The specimens have not been accessible for study and the species is referred with greal 

 doubt to the genus Phaethonides. 



Devonian. iSteptoe Valley, Nr.vada. 



