136 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.87 



coarser spiral sculpture, microscopic spiral lines are present on the 

 entire surface. Base moderately long with a narrow umbilical chink 

 at the tip, marked by four spiral cords, which slightly decrease in 

 size anteriorly. Columella stout, stubby, with six heavy cords and 

 several slender threads anterior to these. Aperture oval, decidedly 

 channeled anteriorly with a deep sinus immediately anterior to the 

 cord at the summit. Anterior to the sinus the outer lip is protracted 

 into a clawlike element that bears a series of nodules corresponding 

 to the cords on the outside; inner lip heavy and reflected over the 

 columella. A callus extends over the parietal wall joining the heavy 

 cord at the summit. 



The type, U.S.N.M. No. 508647, as well as a young specimen, 

 U.S.N.M. No. 508648, from which the tip was described, was col- 

 lected by Dr. Perry at Sanibel Island, Fla. The type has 6.5 whorls 

 remaining and measures : Length, 25.8 mm. ; greater diameter, 9.9 mm. 



The species seems to range down to Key West and into the Ba- 

 hamas. Melatoma hadromeres Melvill from Jamaica appears to be 

 a congener, 



CRASSISPIRA (CRASSISPIRELLA) TAMPAENSIS, new species 



Plate 17, Figuees 5, 13 



Shell elongate-turreted, chestnut-brown; interior of the aperture 

 livid. The first nuclear whorl is well rounded, smooth, succeeded by 

 a fraction of a turn in which faint, closely spaced, retractively curved, 

 axial riblets are present, which in turn merges into the postnuclear 

 sculpture. Postnuclear whorls rendered somewhat shouldered at the 

 summit by a strong spiral cord, which is followed anteriorly by a 

 broad siphonal channel, anterior to which the whorls are marked 

 by strong, somewhat sigmoid, axial ribs extending to the insertion 

 of the columella. These ribs are about half as wide as the spaces 

 that separate them ; of these, 19 are present on the last turn and 17 

 on the antipenultimate, the early whorls being eroded in the type. 

 In addition to the axial ribs, the whorls are marked by fine in- 

 cremental lines, which are decidedly retractively curved in the sub- 

 sutural channel. The spiral sculpture consists of deeply incised lines, 

 which leave the spaces between them as slightly elevated, flattened 

 ribs; of these, 3 cross the axial ribs posterior to the suture. The base, 

 which is moderately long, is similarly marked, and here the incised 

 lines are broader and separate 4 well-differentiated cords, which 

 render the axial ribs nodulose at their junction. Columella short 

 and stout, marked by 9 spiral cords, which decrease in width from 

 the insertion of the columella anteriorly. Aperture elongate pear- 

 shaped; outer lip with a profound sinus a little below the summit; 

 anterior to the sinus it is protracted into a clawlike element with a 



