46 PROCEEDINGS OF THE NATIONAL MUSEUM voi,. 70 



not sharp, inner lip with a wash of enamel, pillar with four subequal 

 thin plaits, the anterior end rounding evenly into the outer lip, with a 

 rather deep anterior sinus. Length of shell, 5; of aperture, 3; diam- 

 eter, 2.5 mm. U. S. Nat. Mus. Cat. No. 107978. 



Off Fernandina, many specimens. 



This has much the form of Conrad's M. denticulata (a preoccupied 

 name subsequently replaced by ehurneola Conrad) but only two-thirds 

 the size, and with a blunter apex, while the outer lip is without 

 denticulation. 



Genus HYALINA Schumacher 



HYALINA STYRIA Dall 



Marginella styria Dall, Bull. Mus. Comp. Zool., vol. 18, p. 140, 1889; Trans. 

 Wagner Inst., vol. 3, p. 5-4, pi. 5, fig. 1, 1890. 



Shell small, smooth, polished, white, with a blunt apex and about 

 four whorls; the suture appressed and overglazed smoothly; general 

 form elongate-oval; aperture narrow, widest in front; outer lip straight, 

 slightly thickened, inner lip with four nearly equal plaits counting the 

 thickened edge of the end of the pillar, axis more or less pervious in 

 different specimens. Length of shell, 7; of aperture, 4.5; diameter, 

 2.5 mm. U. S. Nat. Mus. Cat. No. 107981. 



Off Georgia and Fernandina, very abundant. Off Sombrero, 

 U. S. S. Blalce. 



HYALINA STYRIA (variety) MINOR Dall 



Shell small, smooth, polished, white, with a blunt apex and about 

 four whorls; suture appressed and smoothly glazed over; the spire 

 pointed with a small blunt nucleus; aperture narrow, slightly wider 

 in front; outer lip narrow, straight, bent in, in front of a slight varix, 

 pillar short, with three nearly equal plaits including the thickened 

 anterior edge of the pillar; axis imperforate. Length of shell, 6; of 

 aperture, 4; diameter, 2 mm. U. S. Nat. Mus, Cat. No. 107982. 



Off Fernandina, numerous specimens. 



Although very similar to the species regarded as M. styria s. s., these 

 are uniformly smaller and very uniform in character. 



HYALINA TORTICULA ELU3IVA (new variety) 



Shell small, slender, elongate, smooth, polished, yellowish white, 

 with a blunt apex and about four whorls; suture appressed and 

 smoothly glazed over; aperture narrow; the outer lip slightly thick- 

 ened but without a varix, the middle part moderately arcuately pro- 

 duced; the pillar with four equal plaits, counting the thickened ante- 

 rior edge; axis impervious. Length of shell, 10; of aperture, 6; 

 diameter, 4 mm. U. S. Nat. Mus. Cat. No. 107980. 



Off Fernandina, many specimens. 



