540 Verrill and Bush — Marine Mollusca of the Bermudas. 



Rissoa (Manzonia) minuscula, sp. nov. 



Plate LXV. Fig. 16. 



Shell very minute, pale yellowish brown, ovate, consisting of five 

 whorls besides the small, maramillary, apical whorl. The whorls 

 are convex in the middle ; those of the spire are crossed by three 

 revolving cingnla and covered by numerous, fine, elevated, longi- 

 tudinal costuloe, most distinct in the grooves between the cingula 

 and on the subsutural area, giving the surface a finely cancellated 

 appearance under the microscope ; these costulse do not interrupt 

 the stronger revolving lines. The body-whorl is relatively large and 

 has three or four smaller, additional revolving cingula below the 

 periphery, the last of which circumscribes the narrow and shallow 

 umbilical chink. Aperture round-ovate with a strongly thickened 

 margin, supported by a well-developed marginal rib. 



Length of the only specimen, 2.1"^'^; breadth, 1.2'"'°. 



From the shell-sand. 



Family NATICID-ffi. 



Neverita duplicata (Sa^O, 1822. 



Natica duplicata Say; Gould, Invert. Mass., Binney Ed., p. 345, fig. 615, 1870. 

 Neverita duplicata Verrill, Eep. on Invert, of Vineyard Sd., etc., pi. xxiii, 



fig. 130, 1873. Dall, Bull. U. S. Nat. Mus., No. 37, p. 154, pi. 51, f. 12, 



1889. 



One dead and broken specimen was found at Bailey Bay. 



Family VANIKORID-ffi. 



Vanikoro oxychone Morch. 



Plate LXV. Fig. 6. 



Vanikoro oxychone Mbreli, Syn. Moll. Mar., p. 94, 1877. Tryon, Manual 

 Conch., viii, p. 69, 1886. 



Rare in the shell-sand. 



RACHIGLOSSA. 



Family COLUMBELLID^. 



Atilia monilifera (Sowerby). 



Plate LXV. Fig. 9. 

 Columbella (Atilia) monilifera Tryon, Manual Conch., v, p. 149, pi. 58, f. 100 



(poor), 1883. 



Common in the shell-sand. 



