524 Verrill and Bush — Marine Mollusca of the Bermudas. 



curve ; apical region with a shallow, hut distinct depression. Sur- 

 face nearly smooth, but usually showing microscopic revolving lines, 

 especially on the posterior half ; in the young covering the entire 

 surface. Aperture longer than the body-whorl, narrowed in the 

 middle but expanded at each end, the anterior margin considerably 

 produced and somewhat flaring ; a minute perforate umbilicus in 

 some specimens, columellar margin thickened and nearly straight. 



Length of the largest specimen, 3™™ ; breadth, LG"^"". 



Rare, in the dredged shell-sand. 



Haminea Antillarum (d'Oib)., var. G-audalupensis Sowerby. 

 Plate LXIV. Fig. 6. 



Bulla Antillarum d'Orbigny, L'lle de Cuba, i, p. 124, Atlas, pi. iv, figs. 9-13, 



1853. 

 Haminea Antillarum Morch, Syn. Moll. Mar., p. 175, 1875. Dall, Bull. U. S. 



Nat. Mus., No. 37, p. 84, 1889. Pilsbry, Manual Conch., xv, p. 358, pi. 41, 



figs. 30-36, 1893, with variety Gaudalupensis Sowerby. 



Rare in dredged shell-sand. 



Family SIPHON ARID^. 

 Siphonaria henica, sp. nov. 



Plate LXV. Fig. 8. Plate LXVI. Fig. 8. 



Shell with a broad, elliptical aperture ; a moderately elevated 

 strongly recurved apex, situated near the posterior margin ; and 

 with the surface covered with regular, rather fine, radial costulse 

 and strongly marked, undulating lines of growth which interrupt 

 the costulae, giving an irregularly cancellated appearance ; the cos- 

 tulse are also crossed by fine, intermediate lines of growth. The 

 apical portion consists of a small spiral nucleus of about 1^ whorls 

 turned a little to the left side, and of an expanded, smooth, hood- 

 like, nepionic stage. The costulse commencing at the edge of the 

 latter are at first fine and regular, becoming coarser as they approach 

 the margin. Interior white and glossy, with the muscular scars 

 well-marked, and with a distinct, pulmonary sinus, which forms a 

 distinct emargination at the margin, which is sometimes entire and 

 sometimes crenulated by the costulae. 



Color of the single live specimen, white tinged with yellow. 



Length of aperture, 7.8"^"^; breadth, 7.1"^'"; height, 3'"'". Bailey 

 Bay, shore. 



