MOLLUSCA—CONULARIDA—TENTACULITID^. 1 1 



Manlius of New York, New Jersey and Pennsylvania. 



z6. T. scalariformis Hall. (Fig. 1221.) Devonic. 



Differs from T. hellulus in the more obtuse annulations of the 

 distal portion, with narrower interspaces, and in the more rapidly 

 narrowing apical portion. 



Onondaga of New York, Ohio and Indiana. 



27. T. gracilistriatus Hall. Devonic. 

 In small size and needle-like form very similar to Styliolina 



fissurella but distinguished by the presence of annulations and fine 

 longitudinal striae. 



Hamilton and Marcellus of New York. 



28. T. bellulus Hall. (Fig. 1222.) Devonic. 



Fig. 1 221. Tentaculites scalariformis, FiG. 1222. Tentaculites bellulus, 



X 3. (After Hall.) X 2. (After Hall.) 



Annulations acute; interspaces rounded and marked by con- 

 centric striae. 



Hamilton of New York. 



29. T. attenuatus Hall. Devonic. 



Slender, with distant, rather irregularly spaced and narrow 

 annulations, the interspaces with concentric striae; length 10-12 

 mm. ; resembles T, hellulus, but smaller, and the annulations more 

 irregular. 



Hamilton of eastern New York, Pennsylvania and western 

 Ontario. 



