190 
PALEONTOLOGY OF NEW YORK. 
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both on account of its great size and length, and also of its curved form. The 
latter feature, however, may have come from accidental causes. 
Formation and locality. The specimen figured is from the cabinet of Mr. 
Paul Mohr, of Cincinnati, and was found in the Upper Helderberg limestone in 
the eastern part of Indiana. 
Coleolus (Dentalium?) aciculatum. 
PLATE XXXII A, FIGS. 17, 18. 
Dentalium aciculatum, Hall. Thirteenth Report N. Y. State Cab. Nat. Hist., p. 107. 1860. 
Form slender, elongate, cylindrical, tubular, very gradually attenuating from the 
base. 
Surface striated ? 
The specimens under examination are several fragments of longer tubes, but 
there are no entire examples. Some of these are very slightly curved while 
others are entirely straight, and it is possible that the curvature may be due 
to accident. From the specimens examined no satisfactory determination of 
the surface-markings can be made. 
Formation and locality. In the Goniatite limestone of the Marcellus shale at 
Manlius, N. Y. 
• 
Coleolus ? gracilis, n. sp. 
PLATE XXXII A, FIG. 19. 
Form extremely attenuate, slightly curving, elongate, cylindro-conical, tubular. 
Shell comparatively thick. 
Surface unknown, but apparently transversely striate. 
All the fossils of this species which have come under my observation are 
imbedded in a compact, calcareo-arenaceous rock, the shell adhering firmly to 
the matrix, while the cast of the interior is all that can usually be seen. The 
specimens observed are all slightly curved. 
