142 CATALOG OF POSSIL PISHES IN THE MUSEUM 



the fish; the anal spine, slightly in front of the dorsal; 

 the ventral spines, a Httle nearer the pectoral than the 

 anal. The caudal had a long upper lobe; its lower lobe 

 shows the impressions of a number of radials. 



The shagreen is well shown over most of the fish; its 

 ornamentation (PI. 51, fig. 2) agrees closely with that 

 figured by Whiteaves.^' In the caudal extremity, the 

 scales of the lateral line are well shown. 



Upper Devonic; Scaumenac Bay, near Village of 

 Migouasha, Quebec, Canada. Collected by W. L. 

 Bryant, August, 1915. 



Acanthodian Fin-spine 



£2486 A small spine in matrix (PI. 51, fig. 3). Length as far as pre- 

 served 18 mm.; width, 3 mm. There seems no doubt 

 that this is an Acanthodian spine. 



Conodont bed (Lower Genesee) ; Eighteen Mile Creek, 

 near North Evans, Erie County, N. Y. Collected by W. 

 L. Bryant. 



Family GYRACANTHID^ 



Gyracanthus sarlei, n. sp. 



(PI. 52, figs. 3-5) 



E 2487 Type. — Proximal half of a small spine, on a piece of shale. 

 Length as far as preserved, 38 mm.; maximum width, 9. 



Formation and Locality}^ — Genesee shale; Canandaigua Lake, N. Y. 

 Collected by Prof. CHfton J. Sarle. 



Spine small, 5 or 6 cm. in length. Cross-section an irregular oval, 

 with its narrower side drawn out to a point. Sides ornamented with 

 two sets of striae, forming V's whose apices are on the rounded ridge 

 running the length of the spine; the striae on the thin, wing side of the 

 axis, long, smooth and very little inchned toward the axis, while the 

 striae on cutwater side of spine are shorter, more or less wavy in places, 



" Loc. cit; PI. X, fig. I a. 



58 There was some uncertainty as to the horizon of this specimen, and we submitted it to Prof. A. 

 W. Grabau, of Columbia University, for examination. He pronounced the matrix to be "undoubted 

 Genesee shale." There are two specimens of Leiorhynchus guadricosiaius on the same piece of rock. 



