38 Bulletin ii 38 



columellar plaits. There are no traces of color on the outside of 

 the shell, but the middle la3-er of the shell, when exposed by 

 erosion, is of a very dark color, when well preserved. In 

 full-grown specimens there is a rather thick callus on the 

 body whorl. The species reaches a size of 90 x 70 mm. The 

 plaits are rather thicker and closer together than in C. sub- 

 angulata of the same size." 



Locality. — Alabama : Bell's landing. 



Lapparia dumosa, Con. van, 



Aldrich cites this species i^Mitra dumosa, var.) from Hatche- 

 tigbee bluff, (Geol. Surv. Ala., Bull, i, p. 50), but we did not 

 find the species there. 



Dall says Lapparia extends from "early to later Eocene," 

 (Trans. Wag. Inst. vol. 3, p. 79,) but I am inclined to think 

 that if any specimens are labeled in the U. S. Nat. Museum 

 as coming from Midway or lower Lignitic localities it is owing to 

 confusion of labels in the collection, by L/. C. Johnson. 



Conomitra tracyi, n. sp., PI. 4, fig. 9. 



Specific charanerization . — Size and form as indicated by the 

 figure ; whorls about 7 ; i and 2 smooth ; 3 longitudinally 

 costate ; remaining whorls marked by rather small, sharp costse 

 extending from the suture below to the humeral angle, a 

 depressed subsutural slope ornamented just below the suture 

 with a reappearance of the costse seen below; body whorl with 

 more or less sharply defined spirals ; aperture showing four trans- 

 verse columellar plaits, the i;iost anterior often very faint, 

 the medial two strong ; labrum crenate within. 



If one had the spire alone of this species it could scarceh' be 

 told from the smaller whorls of Volutilithes petrosus and so it 

 doubtless has been regarded, for it is quite common at Woods 

 bluff and would doubtless have been described before now had 

 it not had so deceitful surface ornamentation. The young of 

 Vobitilithes however have much longer anterior canals, the 

 columella is arcuate and there are but two well marked plicae 

 on it and they are oblique, the anteriqr the stronger. 



