I08 TRANSACTIONS OF THE WAGNER FREE 



A single specimen of this interesting species was collected by the writer. 

 It is of the same type as the preceding forms, from which it is at once distin- 

 guishable by its relatively shorter and wider canal and finer sculpture and 

 generally stouter form. In a perfectly adult specimen there may be lirse on 

 the body and within the inner lip as in the other species. 



Latirus tessellatus n. s. 

 Plate lo, figure S a. 

 Shell elongated, slender, with the spire longer than the aperture ; apex 

 acute; early whorls worn, but evidently sculptured much like the rest ; spiral 

 sculpture of, on the last whorl, between the suture and the shoulder four or 

 five low, flattened bands, separated by wider interspaces ; at the shoulder and 

 in front of it to the end of the canal, fifteen more elevated primary, distant 

 threads ; the flatfish interspaces are divided by two or three rather weak 

 grooves into two or more bands, which, by regularly spaced impressed trans- 

 verse lines, are cut more or less distinctly into little squares; the transverse, 

 lines do not cut the primary threads, but appear between them, the tessellation 

 being most distinct at and partly in front of the periphery ; transverse sculpt- 

 ure, beside the impressed lines and those due to growth, consisting of nine 

 rounded, rather stout ribs beginning near the shoulder and extending over the 

 whorl, with about equal interspaces ; suture appressed, distinct, made flexuous 

 by passing over the ribs ; whorl somewhat constricted in front of the suture • 

 aperture elongate ; outer lip crenulated by the sculpture, internally lirate, the 

 lirae falling short of the margin, inner lip callous, with two or three faint ridges 

 near the edge of the canal ; canal narrow ; pillar nearly straight. Lon. of shell 

 37.5 ; of aperture 17.0 ; max. diam. of shell 12.7 mm. 



A single specimen of this interesting species, with the upper whorls some- 

 what worn, was collected from the Caloosahatchie marls. 



Latirus hypsipettus n. s. 

 Plate 10, fig. 5. 

 Shell elevated, slender, acute, nine-whorled, with strong sculpture and a 

 very short canal ; nucleus smooth, subglobose, of a whorl and a half; subse- 

 quent whorls with spiral sculpture of (on the last whorl about nine) strong, 

 distant threads, with much wider, rather smooth interspaces ; of these threads 

 three appear on the upper whorls, the posterior thread somewhat the most 

 prominent ; between the latter and the suture behind it the whorl is appressed 

 toward the suture and shows a few much finer spirals, but these are absent 

 between the primaries ; transverse sculpture of rather marked lines of growth, 

 rarely raised and imbricated near the suture, and (on the last whorl seven) 

 stout, rounded ribs, obsolete near the suture and on the canal ; base of the 

 whorl constricted ; canal short, deep, nearly straight, with a strong fasciole ; 

 outer lip simple, internally lirate ?, inner lip callous, with one or two plaits 

 anteriorly. Lon. of shell 25.0; of aperture 10.8; max. diam. of shell 10.3 mm. 



