72 PROCEEDINGS OF THE ACADEMY OF [1899. 



subapical whorls with uumerous fine longitudinal raised lines, but 

 no revolving sculpture, the other six whorls with six large longitu- 

 dinal ribs, these are crossed by seven revolving ridges on the spiral 

 whorl and about 22 ou the body whorl ; the second and third 

 ridges below the suture somewhat smaller than the others; between 

 the longitudinal ribs and on the narrow anterior portion of the 

 body whorl the revolving ridges become nodulose. Length 31 

 ram., greatest diam. 10 mm. 



Three specimens collected by the writer from the Lower Clai- 

 borne at " Alabama Bluff," Trinity river, Houston Co., Texas. 



This locality, which is fifteen miles southwest of Crockett, is 

 better known as Alabama Crossing. 



Fusus houstonensis n. sp. Plate 1, fig. 4. 



Shell showing eight convex whorls, which are somewhat angular 

 toward the apex (apical whorl wanting), whorls with eight promi- 

 nent longitudinal ribs, and eight revolving ridges on the spiral 

 whorls, the body whorl has about 30 revolving ridges, which be- 

 come smaller on the anterior portion, the two peripheral ridges are 

 more prominent, between and above which are small intermediate 

 raised lines, these are obsolete or wanting between the other ridges. 

 Length of the type specimen 44 mm., greatest diam. 14 mm. 



Collected by the writer from the Lower Claiborne at " Alabama 

 Bluff," Trinity river, Houston Co., Texas. 



Fusus ludovicianus n. sp. Plate I, fig. 5. 



Shell with eleven very convex whorls, the two apical whorls 

 smooth, the following whorl with numerous oblique longitudinal 

 ridges, which soon assume the general sculpture of the shell, spiral 

 whorls with six revolving ridges, the two lower ones the most 

 prominent, on the body whorl are 23 revolving ridges, the six 

 large longitudinal ribs on each whorl are interrupted by a broad 

 deep sutural area. Length of the type 29 mm., greatest diam. 

 9 mm. 



One specimen collected by the writer from the Lower Claiborne 

 at St. Maurice, Winn Parish, La. 



Fusus perobliquus n. sp. 



Whorls very oblique and angular (apical and body whorls want- 

 ing) with seven longitudinal ribs on each whorl and nine revolving 

 ridges, one on the angle of the periphery, five above and three 



