1899.] NATURAL SCIENCES OF PHILADELPHIA. 71 



NEW AND INTERESTING SPECIES IN THE "ISAAC LEA COLLECTION 

 OF EOCENE MOLLUSCA." 



BY CHA8. W. JOHNSON. 



Through the kindness of Rev. L. T. Chamberlain, D. D , Curator 

 of the " Isaac Lea Collection of Eocene Mollusca" in the Acad- 

 emy of Natural Sciences, I have been permitted to describe the 

 following new species, which have been collected by Mr. Thomas A. 

 Morgan, Mr. Frank Burns and the writer, in Alabama, JNIississippi, 

 Louisiana, and Texas, during explorations made under the direc- 

 tion and at the expense of Dr. Chamberlain. 

 Volvaria reticulata n. sp. Plate I, fig. 1. 



Shell cylindrical, spire prominent, whorls five, the three apical 

 whorls smooth, the body and adjoining whorl reticulated by numer- 

 ous, raised, revolving and longitudinal lines, the revolving lines 

 equidistant, while the longitudinal ones, which represent lines of 

 growth, are finer and irregular ; columella with two moderate folds. 

 Length 7^ mm., greatest diameter 3 mm. 



One specimen collected by the writer, from the Lower Claiborne 

 at Moseley's Ferry, Brazos river, Burleson Co., Texas. 

 Mitra grantensis ». sp. Plate I, fig. 2. 



Shell fusiform, specimen showing eight whorls (apex wanting), 

 the first whorl below the apex smooth, the two following Avhorls 

 show only the numerous longitudinal ribs, while the remaining 

 whorls have equally prominent revolving ridges, which are 

 somewhat larger on the anterior portion of the body whorl, wlrile 

 the third and fourtji ridge below the suture are slightly smaller, 

 the interstices formed by the two series of ridges consists of deep 

 square pits, interior of the outer lip with numerous small ridges, 

 columella with four folds, the anterior one very small. Length 

 14 mm., greatest diam. 5 mm. 



One specimen collected by the writer from the Jacksoniau Eocene 

 at ^Montgomery, Grant Parish, La. 

 Fusus apicalis n. sp. Plate I, fig. 3. 



Shell with ten convex whorls, apical whorl smooth, and the three 



