72 Geological Survey of Alabama. 



species of the German Oligocene of Waldboeckelheim, which had been 

 considered as the recent Trif or is per versus, L., but which v. Kronen calls 

 Cerithium Bwttgeri.* I am of the opinion that this German form is a 

 true Triforis. One of my larger specimens, with an outer lip more com- 

 plete than is commonly the rule, has the canal nearly closed. The ab- 

 sence of a third opening is no absolute proof, as some recent sure species 

 of Triforis (for instance, Trif. nigro-cinctum, Ad., of the American 

 Coast) usually do not show it. The number of spiral lines on the base of 

 this German species is variable, depending mainly, but not alone, upon 

 the size of the shell. A few of the largest specimens are distinguished 

 by a fourth line of nodules on the last whorls. 



TRIFORIS MAJOR, n. sp. PI. 1, fig. 6. 



Large ; whorls flat, lower whorls with three longitudinal lines, formed 

 by nodules of equal number in each line ; the nodules of the upper- 

 most spiral are the largest and touch nearly those of the middle line ; they 

 are rounded and separate from each other ; those of the two lower spi- 

 rals are compressed ; the middle is the smallest and apparently last devel- 

 oped ; base flattened, with a distinct impressed line along its margin ; 

 length of the two lower whorls, five mm. 



Locality. Claiborne, Ala. 



TRIFORIS MERIDIONALIS, n. sp. PL 2, fig. 15. 



Large ; whorls flat, with three longitudinal lines, which are continuous 

 and only faintly nodulus the lowest is the largest, the middle line is only 

 one-third and the uppermost two- thirds of its breadth; the suture is defined 

 by one more small, elevated line ; base with a revolving line along the 

 suture. 



Locality. Red Bluff, Miss. 



TRIFORIS, sp. PL 1, fig. 7. 



Small ; whorls flat, with three noduliferous spiral lines, the middle of 

 which is the smallest; of these lines, especially the uppermost one is 

 sometimes broken up in single nodules, but in general they are continu- 

 ous ; base with radial lines of growth and a spiral along its margin. 



Locality. Claiborne, Ala. 



Resembles the preceding species. 



*v. Koenen, Nnrddeutoch. Miocmi., Zweiter Theil; A, Jnhrb. f. Mineraloqie. etc., 

 1882, Beilageband II., p. 272. 



