Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
PI.,ATE CXV—Continued. 
24. A later stage in the development of the tubes, exhibiting the same mode of growth. In this speci¬ 
men the irregular annulations and the fine longitudinal striae are very distinct. 
Hudson River group. Cincinnati, Ohio. 
25. The upper surface of an isolated colony, the tubes of which are of unusually large size and are 
not wholly connate. 
26. The under surface of the same specimen, showing'the point of attachment of the tubes, the orna¬ 
mentation of the outer walls and a younger colony attached near the apices of the larger tubes. 
Hudson River group. Cmcinnati group. 
27. A large colony i-epresenting the adnascent habit of gi'owth, attached to a valve of Strophomena 
alternata. The specimen has been somewhat weathei-ed, the walls of the tubes being largely 
eroded. This is the stage of development seen in the species Ortonia conica, Nicholson, and 
Co7)ehicolite.‘i comigatus, Nicholson. 
Hudson River group. Cincinnati, Ohio. 
28. A stage of growth in which the tubes are gently flexuous and mostly free, the annulations quite 
regular and the longitudinal striae distinct. This is a condition directly comparable to that 
represented in figures 5, 6 and 7, and has been described by Mr. S. A. Miller, under the name 
Tentaculites Richmondemvi. The same or a closely similar condition of development is repre¬ 
sented by the species Tentaculites tenuistriatus. Meek and Worthen. 
Hudson River gi-oup. Richmond, Indiana. 
29. Another specimen representing the same stage of development. 
Hudson River gi’oup. Richmond, Indiana. 
30. A third specimen,enlarged to three diametei's, showing more distinctly the character of the surface 
mai'kings. 
Hudson River group. Richmond, Indiana. 
31. Tubes in a condition of growth closely similar to that of the preceding specimens, the annulations 
being somewhat less regular. This is the Tentaculites incurvus of Shumard, page 18. 
Hudson River group. Near Cape Girardeau, Missowi. 
32. A longitudinal section of the tube of Tentaculites Sterlingensis, Meek and Worthen, enlarged to 
five diameters, showing the thickness of the walls. 
Hudson River group. Cincinnati, Ohio. 
33. Longitudinal sections of two adnascent tubes similar to those represented in figures 9 and 10. 
enlarged to three diameters showing the thickness of the walls. 
Hudson River gi'oup. Cincinnati, Ohio. 
34. Longitudinal sections of portions of two similar tubes, enlarged to three diameters, showing thicker 
and coarsely cellular walls. 
Hudson River gi-oup. Cincimiati, Ohio. 
35. A small specimen of the Tentaculites Richmonderutis, Miller, showing the thick walls. The appar¬ 
ent transverse septa are the edges of the internal annulations. Enlarged to three diameters. 
Hudson River gi-oup. Richmond, Indiana. 
36. A longitudinal section of the Tentaeidites Richmondensis, Miller, enlarged to six diameters, show¬ 
ing the cellular structure of the thick wall. 
Hudson River gi'oup. Richmond, Indiana. 
37. A longitudinal section of the same form of growth, enlarged to five diameters. 
Hudson River group. Richmond, Indiana. 
38. Longitudinal sections of two individuals of the Tentaculites Richmondensis, Miller, enlarged to 
three diametei-s, showing the thickness of the walls. 
Hudson River group. Richmond, Indiana. 
39. Sections of tubes in a similar stage of development, enlarged to three diameters. The apparent 
septate character of the apical portion of the longer tube is due to successive depositions of 
the calcai-eous filling. 
Hudson River group. Richmond, Indiana. 
43. A broken tube attached to a valve of Streptrohynchus plano-con'oexus, showing the annulations on 
the inner surface of the wall, which give an apparent septate charactei- to the tube. 
Hudson River group. Cincinnati, Ohio. 
CORNULITES IMMATURUS. 
Page 18. 
40. Tubes in a very early serpuloid stage of development, similar to that repi-esented in figs. 2 and 4, 
attached to the surface of Crthocercbs. 
Utica slate. Holland Patent, Oneida county. 
CORNULITES FLEXUOSUS. 
Page 18. 
41. The original specimen of Tentaculites? flexuosus, Hall, exhibiting a diffusely radiating mode of 
. growth, the character of the tubes being similar to that represented in figui-es 9, 10 and 11, the 
tubes being more slender and proportionally more elongate. The individuals are attached to a 
valve of Strophomena alternata. Enlarged to two diametei-s. 
Trenton limestone. Lovyville, Lewis county. 
42. A single tube of this form, enlarged to two diameters and retaining the embryonal tip. 
Ti'enton limestone. Lowville, Lewis county. 
