NEW FLORIDA MOLLUSKS — BARTSCH AND REHDER 133 



three ill-defined spiral cords are present on all but the last two whorls, 

 an which there are four, the penultimate having four, while on the 

 last turn intercalated cords appear between these. Base rather long, 

 marked by the continutition of the axial ribs, which become slightly 

 enfeebled anteriorly and the same type of sculpture as that character- 

 izing the shell anterior to the angle. Columella stout, about as long 

 as the base, marked by obliquely slanting, closely approximated, spiral 

 cords, which vary in size and spacing. Aperture narrowly auriculate, 

 decidedly channeled anteriorly and posteriorly. The anterior chan- 

 nel is deep and well rounded and is situated immediately below the 

 summit. The lip posterior to the sinus is somewhat thickened. An- 

 terior to the sinus the lip is much thickened but tapers to an edge and 

 is slightly protracted. The inside of the outer lip immediately an- 

 terior to the channel bears a decided denticle. The inner lip is ap- 

 pressed to the columella as a small callus and thickened on the parietal 

 wall. 



The type, U.S.N.M. No. 8G898a, was collected in low water in Sara- 

 sota Bay, Fla., by Henry Hemphill. It has 7.5 whorls and measures : 

 Length, 8.9 mm. ; greater diameter, 3,3 mm. 



Hemphill likewise collected it on low-water mud flats at Boca Ceiga. 



Genus BELLASPIRA Conrad 



Plate 17, Figubb 6 

 18G8. Bellaspira Conrad, American Journ. Coneli., vol. 3, p. 261. 



This genus appears to be very poorly understood. The senior 

 author has for that reason made a careful examination of Conrad's 

 type, Mangelia virginiana Conrad, which came from the Miocene of 

 Yorktown, Va. This bears Academy of Natural Sciences of Phila- 

 delphia No. 1610, 



It may be redescribed as having the shell elongate-ovate, the nuclear 

 whorls decollated; the postnuclear whorls strongly rounded with a 

 decided angle at the middle of the turns where the first spiral cord is 

 located. The whorls are marked by strong axial ribs, of which 10 are 

 present on the first, 12 on the second and the last whorl. The inter- 

 costal spaces are about one and one-half times as wide as the axial 

 ribs. On the last turn in addition to the spiral cord mentioned above, 

 two more are present anterior to this between it and the periphery. 

 Base moderately long, marked by the continuation of the axial ribs, 

 which evanesce on the middle of the columella. The specimen ap- 

 pears too worn to yield evidence as to the presence of spiral threads on 

 the base. Columella bears 1 spiral threads. Aperture moderately 

 large, ovate, decidedly channeled anteriorly with a posterior sinus at 

 the summit of the outer lip, limited by a thickening at the outer edge. 



