1 62 TRANSACTIONS OF THE WAGNER FREE 



aperture and callus rise to the anterior of these carinse ; outer lip thickened 

 slightly reflected, roundly arched, feebly denticulate ; inner lip callous, reflected, 

 spirally lirate on the body behind and the pillar in front with a non-lirate 

 space between ; siphonal notch narrow, sharp, producing a strong siphonal 

 fasciole with a channel behind it ; canal short, recurved. Max. Ion. of shell 

 17.0; of aperture 13. 0; max. lat. of shell 13.0 mm. This shell has one varix 

 beside the actual lip and was collected two and a half miles east from New- 

 ton, Mississippi. 



The adult shell, which is only known from internal casts and gutta-percha 

 squeezes from natural molds found at Ocala, reaches a length of 55.0 and a 

 minimum width of 45.0 mm., judging from the casts; it retains the short, 

 globose shape and exhibits on the last half whorl eight or ten somewhat 

 flexuous ribs, beginning at the suture and extending beyond the periphery, 

 fairly well marked on the casts. The shell appears to have been rather thin 

 and the liration of the aperture was doubtless more prominent and general 

 than in the young shell above described. The spiral sculpture has left no 

 traces on the cast of the last whorl except internally, where three or more 

 faint ridges indicate a grooving or liration of the columella. 



The incremental lines are quite evident on the young shell, which they 

 sometimes reticulate feebly, and on the adult were still noticeable. 



This shell is shorter and more globose in form than any of the described 

 species from the American Tertiary. The young are most like the young of 

 Semicassis calatura Conrad, which is a more elongated, narrower shell, with 

 much coarser and rougher sculpture, and in which the adult is not ribbed. 

 The figure of this species will appear in Part II. of this paper. 



Phalium Aldrichi n. s. 



Lower Miocene of the Chipola beds, Chipola River, N. W. Florida. 



Shell small, stout, solid, subglobose, with three smooth nuclear and four 

 subsequent whorls ; spiral sculpture on the last whorl in front of the shoulder 

 of fourteen primary, strong, flatfish, wide, elevated ridges, with much narrower 

 interspaces ; a single fine, intercalary thread is sometimes present in most of 

 the channels ; the peripheral spiral is larger than the others, but not so large 

 as that at the shoulder ; on the shoulder are three primary, more or less rippled 

 spirals, the first at the suture, which is not appressed ; in the channel in front 

 of it is a single secondary thread, the second channel has two, and between 

 the third primary and the shoulder are three fine threads close together, form- 

 ing a sort of band behind the tuberculous shoulder ; the tubercles here are 

 squarish and about fifteen on the last whorl ; transverse sculpture of rather 

 regularly spaced, impressed lines, which cut the primary spirals in a way to 

 recall by the result the ends of shingles on a roof, as the irregularities are not 

 nodules, and have their long slope toward the aperture ; the shell now de- 

 scribed has two past varices ; outer- lip much thickened, with a deep groove 



