NEW FLORIDA MOLLUSKS — BARTSCH AND REHDER 137 



mere indication of stromboid notching anteriorly; the inner lip ex- 

 tends over the columella as a broad callus leaving a narrow umbilical 

 chink at its anterior end, A callus extends over the parietal wall. 



The type, U.S.N.M. No. 493409, was collected by C. W. Jolinson 

 at Tampa Bay, Fla. It has 10 whorls remaining and measures: 

 Length, 22.0 mm. ; greater diameter, 7.3 mm. 



U.S.N.M. No. 412154 contains 4 young specimens from the same 

 source, the tip of one of which has served for our nuclear description. 



MONILISPIRA, new genus 



Shell moderately large. The first 2 nuclear whorls are smooth, 

 followed by a turn in which there are moderately strong, retractively 

 curved axial riblets, which are about as wide as the spaces that sep- 

 arate them ; following this is the postnuclear sculpture. Postnuclear 

 whorls with a strong, broad, somewhat wavy, nodulose spiral cord 

 at the summit and a series of very large conic nodules immediately 

 above the periphery. The base is marked by 3 nodulose spiral 

 threads, while the posterior portion of the columella bears 2. In 

 addition, the entire surface of the whorls from the summit to the tip 

 of the columella is marked by lines of growth and fine spiral stria- 

 tions. The sinus is moderately deep and broad and falls between 

 the spiral cord at the summit and the nodules anterior to it. The 

 outer lip is protracted anterior to the sinus ; inner lip is reflected and 

 appressed to the columella; parietal wall covered with a moderately 

 thick callus, which is at best but slightly thickened at the posterior 

 angle of the aperture. Operculum claw-shaped, with apical nucleus 

 and concentric lines of growth. 



Type: Monilispira monilifera (Carpenter) {=Drillia monilifera 

 Carpenter). Gulf of California. 



This group is known from the Gulf of California as well as 

 Florida and the West Indies. 



MONILISPIRA MONILIS, new species 

 Plate 17, Figxjee 10 



Shell elongate-turreted, chestnut-brown except for the tubercles, 

 which are pale yellow, the interior of the aperture reflecting the 

 coloration of the outside. The first 2 nuclear whorls are smooth, 

 followed by a turn in which there are moderately strong, retractively 

 curved axial riblets, which are about as wide as the spaces that 

 separate them; following this is the postnuclear sculpture. Post- 

 nuclear whorls with a spiral cord immediately below the summit and 

 a broad tuberculated cord immediately above the suture. The latter 

 is marked by a secondary cord, which coincides with the crest of the 



