168 CATALOG OF FOSSIL FISHES IN THE MUSEUM 



E 1853 Fragment of a spine. 



Onondaga limestone; Park Quarry, Bufifalo, New 

 York. Collected by Mr. F. K- Mixer. 



E 1854 Fragment of a spine. 



Onondaga limestone; Cement Quarry, Bufifalo, New 

 York. Piper collection. 



Machaeracanthus sp. 



(PL 53, fig. 4) 



In addition to the specifically determinable spines described above, 

 there are in the Buffalo Museum a number of spine fragments col- 

 lected by Mr. Bryant in the Conodont bed, which are rather more 

 slender than is usual in spines of this genus. They are most like those 

 of M. peracutus, but may represent a distinct species. 



E 2514 Distal third of a spine drawn out to a much more slender 

 point than in any species of Machcer acanthus of which 

 the complete spine is known; in matrix (PI. 53, fig. 4). 

 Length, as far as preserved, 57 mm.; greatest width, 

 13. The spine possibly appears so slender through the 

 thin lateral alae having been broken away before the 

 specimen became embedded in sediment. 



E 2515 Distal end of a spine; the lateral alae restored in plaster. 



Onchus rectus Eastman 



E 2591 Spine measuring 3.5 cm. as far as preserved. The distal 

 extremity is lacking and the proximal half of the inserted 

 portion is represented only by the impression. The spine 

 when complete measured not more than 4.5 cm. It 

 agrees in every character with Eastman's description of 

 this rare species, hitherto known only by two specimens 

 from the Chemung of Delaware County, N. Y. 



Limestone layer at the horizon of the ' 'Third oil sand" 

 (Chemxmg group), Erie, Pa. Collected by Mr. E. J. 

 Armstrong. 



