PLATE LXXIVL 
Orthoceras subulatum. 
Page 2d3. 
See Plates 38, 84. 
Fig. 1. The chamber of habitation nearly entire, and preserving a portion of the test. Hamilton group. 
Pratt's Falls, N. Y. 
Fig. 2. A septum of the preceding, showing the central position of the siphuncle. 
Orthoceras Bebryx, var. Cayuga. 
Page-276. 
See Plate 39, 91, 92. 
Fig. 3. A fragment of the chambered portion, showing the siphuncle exposed. The specimen has been 
compressed and the siphuncle displaced, and lying against the interior surface of the cham¬ 
ber walls. Chemung group. Ithaca, N. Y. 
Fig. 4. A compressed septate fragment, showing the oblique sutures, as produced by compression. Che¬ 
mung group. Ithaca, N. Y. 
Fig. 5. A portion of a smaller individual of the same species (?), showing a gentle constriction of the cham¬ 
ber of habitation and traces of the lamellose surface markings. 
