58 PROCEEDINGS OF THE ACADEMY OF [1895. 



5 nodular and with a subsutural line or band; 6, 7, 8, as 5, but 

 also striate spirally ; 9, 10 nodular costate, costse showing a slight 

 tendency to become oblique, mainly confined to the lower moiety of 

 the whorls, strongly striate below, and with two noticeably large 

 striae on the carina, faintly striate above; body whorl with rather 

 coarse spiral lines alternating in size from the carinal region to the 

 end of the beak, silpercarinal region faintly striate, costie obscure, 

 labrum striate within. 



Localities. Smith ville, Bastrop Co.; Hurricane Bayou, Marsters' 

 Survey, Houston Co., Tex. 



Geological horizon. Lower Claiborne Eocene. 



Type. Texas State Museum. 

 Pleurotoma huppertzi nov. sp. PL 4, fig. 9. 



Specific characterization. Size and general form as indicated in 

 the figure; whorls 11; 1, 2 smooth, 3-10 somewhat inflated sub- 

 medially, longitudinal costse obtuse, most prominent submedially, 

 almost vanishing on the subsutural portions of the whorls, becoming 

 short and nodular on the upper whorls, prominently striate spirally, 

 the striae often irregular and waving on the medial portions of the 

 whorls; body whorl costate and spirally striate, striae becoming of 

 alternating strength on the beak. 



Localities. Bombshell Bluff, Colorado River, about li miles 

 west-northwest of Devil's Eye; Smithville, Bastrop Co., Tex. 



A very closely allied form occurs at Wood's Bluff, Ala. The 

 main difference consists in the different location of the retral sinus. 

 In the Alabama specimens it is located on the humeral angle while 

 in the Texan it is about one-third way from this angle to the suture. 



Geological horizon. Lower Claiborne Eocene. 



Type. Texas State Museum. 

 Variety penrosei nov. var. PL 4, fig. 10. 



Differs from typical huppertzi in having the whorls more acutely 

 carinated, the striation above the carina is evanescent, and the length 

 of the canal is often less in proportion to the height of the spire. 



Localities. Same as for Huppertzi. 



Geological horizon. Lower Claiborne Eocene. 



Type specimen. Texas State Museum. 

 Pleurotoma leoncola nov. sp. PL 5, fig. 1. 



Specific characterization. General form and size as indicated by 



