fPLATE CXIV—Continued. 
TeNTACULITES DeXITHEA, 11. sp. 
Page 6. 
Fig. IS. Three individuals of the species upon a block of sandstone. 
Fig. 19. The specimen on the right of the block in the preceding figure, enlarged to two diameters. The 
uppei- poi-tion of the specimen is preserved as a cast of the interior, the lower portion retaining 
the crust. The species differs from T. scalariformis in its much more elongate and slender form 
and its more slojiing annuli. 
Upper Heldei-berg group. Prom the sandstones at the base of the Corniferons limestone 
at Pendleton, Indiana. . .1 : 
0! 
TeNTACULITES SCi^LARIFORMIS. Hilll. ''I 
Page 6. 
Fig. 20. A block of limestone bearing numerous individuals of this species, all of which ai-e flattened and 
consequently made to appear I’elatively too bi'oad. 
Coj-niferous limestone. Delaware, Delaware county, Ohio. 
Hyolithes centennialis. Barrett. 
Page 6. ' 
Fig. 21. A fragment of a small specimen of this species which was intended to represent the ventral side 
of the shell, but the left edge of the drawing is the axial line of the convex or dorsal surface, and 
the sui'face represented is the right dorsal slope. The specimen shows the faint longitudinal 
striae near the lateral margin. 
Lower Hehtei-berg group. Port Jervis, Orange county. -111 ' 
Fig. 22. Dorsal view of a large individual, showing the character of the ornamentation, which consists of 
elevated, transverse, sinuoixs lines, becoming obsolete near margins. The edges of these striae 
are sometimes faintly crenulate. 
Fig. 23. A portion of the surface of another specimen enlarged to two diameters, showing the crenulation 
of the transverse sti-iae. 
Lower Helderbei'g group. Port Jervis, Orange coimty. 
Hyolithes iieros, ii. sp. 
Page 7. 
Fig. 24. The ventral surface of a specimen from which the apical portion has been lost, showing the faint 
tranverse lines and two longitudinal furi'ows which extend nearly two-thirds the entire length 
of the shell. 
Fig. 25. The dorsal surface of the same specimen, showing the fine longitudinal striae and the bj'oad mar¬ 
ginal undulations. 
Fig. 26. A poi’tion of the dorsal surface, eidarged to two diameters, showing the character of the orna¬ 
mentation. 
Fig. 27. Transverse section of the same specimen, showing the degree of convexity of the dorsal and ventral 
surfaces. 
Lower Helderberg group. Near Clarksville, Albany county. 
StYLIOLA SPICA, 11 . sp. 
Page 7. 
Fig. 28. An individual enlarged to two diameters, showing the symmetrical uncompi'essed foi-m and smooth 
surface. This species differs from Styliola fis.mrella in its comparatively great size, and the 
entire absence of indications of ti-ansvei'se annuli. 
Hamilton gi-oup. Hamburgh, Erie coimty. 
CoLEOLus IIerzeri, 11. sp. 
Page 7. 
Fig. 29. A nearly entire individual showing the gently incurved form and the faint obliquely transverse 
strise. Waverly grouiu Medina, Ohio. 
PlIARETRELLA TENEBROSA, II. Sp. 
Page 7.. 
Fio-. 30. An individual of this species, showing the Hyolithes-like form and the fine, sinuous, transverse 
strife. The substance of the shell is extremely thin and delicate and the strise are slightly 
imbricating. 
Fig. 31. A portion of the surface of the same specimen enlarged to two diameters, showing the character 
of the ornamentation. 
Hamilton group (Genesee shales). Genesee county. 
