282 



fe-4 



Genus STYLIOLINA. Karpinsky. 



[Ety. : Diminutive of the recent genus Styliola.] 



dss4 : Die fossilen Pteropoden am Ostabhange des Urals. Mem. de l'Acad. 

 St. Petersburg, 7th Ser., T. XXXII., No. 1.) 



Shells small, needle-shaped, with a circular transverse sec- 

 tion. The apex is solid and usually bulbiform, and the sur- 

 face is smooth, with only fine lines of growth. 



Styliolixa fissurella. ( Hall. ) ( Fig. 214. ) ( Pal. X. Y., 

 Vol. V.. Pt. II., p. 178, PL XXXI.) 



Distinguishing ( 'haracters. — Small 

 size: needle-like form; minute, of- 

 ten bulbiferous, apex; transverse 

 and sometimes longitudinal stria?; 

 sharply depressed central fracture 

 line in all the compressed specimens. 

 Found everywhere in the rocks of 

 this region; especially abundant in 

 the lower Genesee, where these shells 

 make up the Styliolina limestone; 

 also abundant in the Marcellus shale, on the Lake Shore 

 (not observed in the Encrinal limestone). 



Styliolixa spica. (Hall.) (Fig. 21 4A.) 

 (Pal. N. Y., Vol. V., Pt. II.; supplement. Vol. 

 VII., p. 7, Pl.CXIY.) 



Distinguishing Characters. — Greater size 

 and more robust form than S. fissurelln : ab- 

 sence of indications of annulations or apical 

 node. 

 fig. sua., styiio- Found in the Hamilton shales, at "Ham- 



lina spica, x 2 (after . „ . ,, lt n 



Haii). burg, Erie County. (Hall.) 



Genus TFXTACULITES. Schlotheim. 



I Ety. : Tentaculum, feeler ; Itthos, stone.] 

 (1820 : Schlotheim Petrefactenkunde, p. 337.) 



Shells straight, elongate, attenuately conical tubes, their 

 surfaces marked by strong rings or annulations, which are 



Fig. 214. Styliolina fissurella. 

 A fragment of slate with numer- 

 ous individuals, x3, and a speci- 

 men much enlarged (after Hall;. 



