42 A Contribution to the Lower Devonian Faunas of Maryland 



The writer has seen hut a single specimen of this species. The con- 

 dition of preservation is such that no details could be learned further than 

 those given hy the author of the species. 



Occurrence. — Helderberg Formation, Becraft Member. Warren 

 Point, Pennsylvania. 



Collection. — Maryland Geological Survey. 



Tentaculites aculus Hall 

 Plate LXXXVII, Figs. 6, 7 



Tentaculites aculus Hall, 1888, Nat. Hist. N. Y., Pal., vol. vli, p. 6 (supple- 

 ment to vol. v), pi. cxiv, figs. 15-17. 

 Tentaculites acula ? Waller, 1903, Pal. N. J., vol. iii, p. 336, pi. xliil, fig. 11. 



Description. — " This species is distinguished hy the regular, equi- 

 distant annuli and the few annulations on the intervals." Hall, 1888. 



Occurrence. — Oriskany Formation, Shriver Member. 21st Bridge, 

 Cash Valley, North Branch. 



Collections. — Maryland Geological Survey, U. S. National iluseum. 



Tentaculites elongatus Hall 

 Plate LXXXVII, Figs. 8-10 



Tentaculites elongatus Hall, 1859, Nat. Hist. N. Y., Pal., vol. iii, p. 136, pi. vi, 

 figs. 16-21, 1861. 



Tentaculites elongatus Hall, 1888, Nat. Hist. N. Y., Pal., vol. vii, p. 6 (supple- 

 ment), pi. cxiv, fig. 14. 



Tentaculites elongatus Clarke, 1900, Mem. N. Y. State Mus., No. 3, vol. iii, 

 p. 27, pi. iii, figs. 8-12. 



Tentaculites elongatus Weller, 1903, Pal. N. J., vol. iii, p. 295, pi. xxxii, fig. 4; 

 p. 319; p. 363, pi. 1, figs. 4, 5. 



Description. — " Body extremely elongated and very gradually tapering 

 to the apex, which is sometimes slightly curved ; marked by strong, sharp 

 annulations of which more than three occur in the space of the diameter 

 of the tube. Section cylindrical. Surface ornamented by fine close an- 

 nulating strife. Length from one to three inclio.'^. Annulations four or 

 five in the space of a quarter of an inch at the base of the larger specimens, 

 and about nine in the same space near the apex." Hall, 1859. 



