THE JOURNAL 



- OF THK - 



Cincinnati Society of Natural History. 



Voi,. XVII. Cincinnati, October, 1894. No. 3. 



DESCRIPTION OF SOME CINCINNATI FOSSILS. 

 By S. A. Miller and C. L. Fabek. 



GOMPHOCERAS INDIANENSE n. Sp. 



Plate 7, Fig. 3, body chamber and ten septa ; Fig. 5, outline of 

 a. transverse section ; Fig. 4, outline of the tenth septum and 

 position of siphuncle. 



Shell medium or a little above medium size. Transverse 

 section ovate. Ventral or narrow side of the ovate outline 

 nearly straight, while the opposite or dorsal side is strongly 

 arched from the apex to the mouth. Body chamber forming 

 nearly half the length of the shell ; the specimen illustrated 

 has part of the tenth air chamber, and another specimen has 

 part of the eleventh air chamber preserved, and apparently 

 it approximates close to the apex. Probably, if complete, 

 these specimens would not have more than thirteen or four- 

 teen air chambers. Septa moderately concave, the concavity 

 not amounting to the depth of an air chamber, and almost 

 equally distant from each other, from the apex to the body 

 chamber. The increase in the diameter of the shell is not 

 followed with a corresponding increase in the distance of the 

 septa from each other, or in the length of the air chambers. 

 The sutures curve forward over the dorsal or convex side of 



