210 



THE CARBONIFEEOUS SYSTEM. 



surface, and is an inch and a half in length, and about seven lines wide 

 in the middle. The anterior edge is slightly and regularly rounded, 

 and the posterior edge forms an obtuse angle rounded at the apex. 

 Other teeth are referable to the genus Psammodus (Fig. 54). There 

 are also spines of the genus Gyracanthus (Fig. 55), though not of the 



Fig. 55. — Spine — Gyracanthus duinlicatus, N.S. 



magnificent proportions of a specimen found by ]\Ir Barnes in Cape 

 Breton, and measuring 22 inches in length (Fig. 55a). Not being 



Fig. 55a. — Sjrine — Gyracanthus niagnificm, N.S.^ reduced. 



able to identify these fossils with any described species, I have 

 assigned to them provisional names until further sj)ecimens shall 

 render them better known. 



Many scales and other remains of fishes occur in the roof of the 

 main coal at Pictou, and also in the bed included in that coal-seam 

 which afforded the reptile Baphetes planiceps^ and which is evidently 

 in the manner of its formation of the same general character with the 

 Modiola and Cypris shales of the Joggins. Most of these belong to 

 the genus Rhizodus, and to a species not distinguishable from R. 



Fig. 56. — JRhizodus lancifer (?}. 



(a) Tooth ; (J) scale. 



lancifer^ Newberry (Fig. 56), of the Coal-field of Ohio. There is 



