Mauylaxd Geological Survey 301 



ton beds, although in the succeeding Portage beds it is of common occur- 

 rence. The distinguishing characters have been clearly stated by Pro- 

 fessor Grabau as the "small size; needle-like form; minute, often bulbi- 

 ferous apex; transverse and sometimes longitudinal striae; sharply de- 

 pressed central fracture line in all the compressed specimens " (Bull. 

 Buffalo Soc. Nat. Sciences, vol. vi. 1899, p. 282). 



Length 1-3 mm. ; width i/o mm. at mouth of specimen 3 mm. in length. 



Occurrence. — Romney Formation, Onondaga Member. Tonoloway, 

 Md.; Williams Road, 3"t^ miles east of Cumberland; B. & 0. R. R. cut at 

 21st Bridge; Hanging Rock, W. Va.; W. Va. Cent. R. R. cut at 21st 

 Bridge. Marcellus Member. East of Oldtown. Hamilton Member. 

 East bank Evitts Creek beloAV Wolfe Mill; west of iron bridge over Town 

 Creek northeast of Oldtown; Licking Creek east of Warren Point; 

 Ernstville. 



Collections. — Maryland Geological Survey; Xew York State Museum; 

 American Museum of Natural History. 



Suborder CONULARIDA 

 Family TENTACULITIDAE 



Genus TENTACULITES Schlotheim 



Tentaculites attenuatus Hall 

 Plate XXXVII, Fig. 21 



Tentaculites attenuatus Hall, 1876, Illustrations Dev. Fossils: Pteropoda, 



pi. xxvi, figs. 19, 20. 

 Tentaculites attenuatus Hall, 1879, Pal. N. Y., vol. v, pt. ii, p. 170, pi. xxxi, 



figs. 19, 20. 

 Tentaculites attenuatus Grabau and Shinier, 1910, N. Am. Index Fossils, vol. 



ii, p. 11. 



Description. — " Form elongate-conical, regularly expanding from the 

 apex, and -with no evidence of becoming cylindrical towards the aperture. 

 The apical portion of the shell is very finely marked by acute annulations 

 for a distance of about two and a half millimeters, without visible inter- 

 mediate striae; beyond this, toward the aperture, the annulations increase 

 in distance, and the intermediate furroAvs are marked with one, two. 



