70 PROCEEDINGS OF THE ACADEMY OF [1895. 



species formerly described as Fusua trabeatus and Busyeonf blakei, 

 its characters must be fairly familiar to every worker in Tertiary 

 paleontology. They may be summed up as follows: — 



Shell of Fulgurate aspect and affinities (not Fusoid as the name 

 unfortunately indicates) ; with three carina? on the body whorl, the 

 uppermost strongest and generally spinose, the 6econd less distinct 

 and less frequently spinose, the third or lowest generally faint and 

 obtuse and with no signs of tubercles or spines. 



Besides the two species referred to this genus by Conrad, the 

 writer has added two more, viz., Levifusus branneri, originally de- 

 scribed from the White Bluff horizon of Arkansas, and L. trabeat- 

 oides. 



At Wood's Bluff, Ala., there is a form of Levifusus with charac- 

 ters intermediate between L. trabeatus and L. trabeatoides and it is 

 doubtless the ancestral type of both. This prototype may then be 

 regarded as having produced the true L. trabeatus in Alabama, 

 while in Texas the L. trabeatoides was developed. L. blakei is 

 somewhat more tuberculate on its uppermost carina than L. trabeatus 

 or L. trabeatoides but is not so strongly marked as L. branneri; 

 the last- mentioned species the writer has recently found in typical 

 Jackson Eocene deposits at Moody's Branch, Jackson, Miss. 



Localities. — Rio Grande, 2 miles above San Jose, Tex.; Mosley's 

 Ferry, Brazos River; Colorado River, bluff just below the mouth of 

 Alum Creek ; Rio Grande, 15 miles below Carrizo; Little Brazos 

 River, near iron bridge on Mosley's Ferry road; Brazos River, 500 

 yards below the mouth of Little Brazos; Cedar Creek, southeast 

 corner of Wheelock League, Robertson Co.; Smithville, Bastrop Co.; 

 Alum Bluff, Trinity River, Houston Co.; Campbell Creek, Robert- 

 sou Co.; 2 miles west of Crockett, Houston Co.; northwest corner of 

 Madisou Co.; Jones' farm, Hurricane Bayou, Houston Co.; Orrell's 

 crossing, Elm Creek, Lee Co. ; cutting on Houston, East & West 

 Texas R. R., 4 miles north of Corrigan, Polk Co.; southeast corner 

 of Frio Co. ; southeast of Campbellton, south of Lipan Creek, Atas- 

 cosa Co. Also at Gibbsland, Bienville Park, La., and Walnut Bluff, 

 Ouachita River, Ark. 



Geological horizon. — Lower Claiborne Eocene. 



Type. — Texas State Museum. 



