Weno and Pawpaw Formations 91 



and two lateral lobes. The siphonal lobe is about twice as tall as broad, 

 and laterally is minutely dissected, and has also two or three prominent 

 lateral inflections. The terminal points are slender and slightly incised 

 laterally. The first lateral saddle is nearly twice as broad as the siphonal 

 lobe and is trifid, having the more dorsal division slightly dissected, the 

 broader central division trifid, and the slender ventral division next to the 

 siphonal lobe entire. The deepest incision in the saddle lies between the 

 first two divisions. The first lateral lobe is slender and about two and 



Fig. 11. Schloenbachia, wintoni n. sp., type individual, last suture, camera lucida draw- 

 ing, x 5. Keel region slightly distorted in type individual. 



one-half times as tall as broad. It is bifid terminally and the ventral 

 lobule is larger. Each lobule is trifid. The selond saddle is lower and 

 broader than the first lobe, and is bifid terminally; laterally it has an ir- 

 regular outline. The second lobe is broad and bifid. The internal suture 

 has not been examined. 



This species differs from Schloenbachia nodosa Bose and S. trinodosa 

 Bose in its suture and in the cross-section of the volution ; it differs from 

 the common Schloenbachia of the Fort Worth limestone (S. leonensis of 

 various authors) in many respects, notably in its marginal tubercles. 



MORTONICERAS WORTHENSE n. sp. 



PI. 1, figs. 6-10, 18-19, 26 

 1920: Mortoniceras sp. Winton and Adkins, Univ. Texas Bull. 1931, p. 68. 



MEASUREMENTS: I (tpe) II III IV 



Fragment, outer whorl ; length 15.0 16.5 14.4 10.8 



Small end, height 3.5 4.3 3.0 2.4 



