BEEDE: UPPER PERMIAN RED BEDS. 167 



located just a trifle above the middle, followed by a second, 

 much fainter one, below it. The two are separated by a 

 concavity. The base rounds off rapidly below the keel. The 

 nature of the apertural region is unknown. The surface is 

 marked, as shown in the mold, by slightly fiexuous growth 

 lines bending backward on the keel. Apical angle about 42 

 degrees. 



Dozier, Tex. ; rare. 



This species differs from M. texana in having a larger api- 

 cal angle, the band higher above the suture, more prominent, 

 and sharper. It differs from M. golowkinskii Jakowlew in 

 having a larger angle of divergence (42 degrees instead of 28 

 degrees), and possibly some details of the body whorl. 



MURCHISONIA GOULDII, n. sp. 



Plate VIII, figures 6-66. 



Shell small, narrowly trochiform ; whorls about seven, 

 keeled, regularly expanding, angular; sutures distinct. 

 There are three revolving ridges on the shell, the upper bor- 

 dering the suture, the middle one forming the prominent 

 keel in the middle of the volution, and a lower one covered 

 by the upper one in the spire, a short distance below the keel. 

 The interspaces are concave. The upper ridge makes the 

 suture canaliculate. On the body whorl the shell strikes 

 suddenly off below the lower ridge, leaving the base of the 

 body whorl nearly flat. The surface is marked on the band 

 and above it by fine revolving lines. None have been seen 

 below. 



Whitehorse spring, Okla. ; Dozier, Tex. 



This species may be distinguished from M. colling sworthensis, 

 ante, by the fine revolving lines on the band and above it. 



LOXONEMA PERMIANA, n. sp. 



Plate VIII, figures 14, 14a. 



Shell minute, acutely pointed, very slender, the suture dis- 

 tinct. There are probably eight or ten whorls in an adult 

 specimen, enlarging very slightly, with moderately deep 

 sutures. The distance from suture to 'suture on the lower 

 portion of the spire is about equal to the diameter of the shell 



