283 



closely arranged near the apex, and more distant and 

 stronger near the mouth. Fine transverse and rarely longi- 

 tudinal stride are present. 



Textacilites BELLULUS. Hall. (Fig. lJir>.) (Pal. N.Y., 

 Vol. v., Pt. II., p. 169, Pis. XXXI., XXXI.A.) 



DistingiU!<hing Characters. — Elongate 

 conical form, becoming cylindrical towards 

 the mouth; apex attenuate, with close 

 acute annulations, the extreme i)ortion 

 apparently smooth; annulations acute, 

 interspace rounded, with concentric striae. 



Found in the upper Moscow shales, at 

 Section 2 (?); in the Stictopora and De- 

 missa beds, at Section 5 (rare); five to fig. 215. Tentacuutes 



t 4- s -,-U^ 4-1 17 -IT ^ 6e//u/us. Enlarged (after 



lourteen leet below the Lncrnial limestone, Haii>. 

 at Section 7. 



Tentaculites GRAciLiSTRi.iTus. Hall. (Fig. 210.) (Pal. 

 N. Y., Vol. v., Pt. II., p. 173, Pis. XXXI., XXXI.A. ) 



Distinguishing Cliaracters. — Small size; general resem- 

 blance to S. fissurella ; sub-equidistant annulations, with 

 wider interspaces ; smooth apical portion ; 

 continuous fine longitudinal strite, invisible 

 to the unaided eye. 



Found in the upper Moscow shale ; especi- 

 ally abundant two feet below the Styliolina, 

 at Section 3 ; rarely in the Demissa bed four 

 feet below vStyliolina, at Section 6 ; in the 

 ui)per Trilobite beds and associate shales ^ „,« ^ , 



i i Fig. 216. . Tentacu- 



(rare) ; in the Transition and upper Marcel- H^^^ S"it^ 

 Ins beds, on the Lake Shore (common). ^^^^'' 



Genus COLEOLUS. Hall. 



[Ety. : Koleos, sheath. ] 

 (1879 : Pal. N. Y., Vol. V., Pt. II., p. 184.) 



"Shell tubiform, extremely elongate conical, straight or 

 slightly curved, comparatively thick; inner walls smooth. 



