A. E. Verrill — MoUnsca of the Nevi England Coast. 175 



siitnre. Aperture rather broad-ovate, narrowing gradually to the 

 canal, without any marked constriction. Canal short, rather broad, 

 wide at base, narrowing toward the tip. Columella nearly straight, 

 slightly sigmoid tow^ard the tip. Operculum small, pear-shaped, 

 narrowed anteriorly, with the inner edge slightly incurved, and with 

 a minute notch close to the tip, just behind the ihinute subspiral 

 nucleus, which is situated just within the margin, much as in the 

 preceding species and S. parvus. Epidermis thin, occasionally rising 

 into minute scales and points along the lines of growth, especially 

 near the suture. Color, in alcohol, dull pinkish white. Nuclear 

 W'horls pale brownish. 



Length of one of the largest specimens, 14""" ; breadth, 7-5"'"' ; 

 length of body-whorl and canal, 10"""; length of aperture, S'""' ; its 

 breadth, 8-5""". 



Station 2115, N. lat. 35^ 49' 30", W. long. 74° 34' 45", in 843 

 fathoms, three living specimens (No. 35,573) ; and station 2055, 

 N. lat. 42' 32", W. long. 68° 17', in 99-5 fathoms, one dead specimen. 



This species has some resemblance to 3fohnia Mohnii Friele, for a 

 specimen of which I am indebted to tlie kindness of Mr. Friele. 

 The latter is a less delicate shell, with coarser spiral lines, and with 

 much larger nuclear whorls, and the operculum is much more dis- 

 tinctly spiral, its nucleus being larger and farther from the edge. 



S. concinn.Ks [Eitsus concinnus Jeff.), is also similar to our species 

 in form and size. 



Sipho leptaleUS Verrill, sp. nov. 



Plate XXXT, figure 14. 

 Shell small, fusiform, glossy white, with five whorls, which are 

 very convex, slightly carinated and angulated in the middle, on the 

 lower whorls. Suture well impressed. Spire elevated, regularly 

 tapered, acute. The sculpture consists of numerous regular, thin, 

 delicate, raised, longitudinal ribs, which are bent in a sigmoid curve, 

 the part corresponding to the most prominent angle of the whorls 

 strongly receding ; and of fine, microscopic, wavy revolving lines 

 between the ribs. There is usually a distinct internal line, just 

 below the suture. Aperture irregularly ovate, rather narrow, elon- 

 gated. Outer lip thin, rounded to the base of the canal, which is 

 somewhat lengthened, oblique, and a little twisted. The columella- 

 margin of the canal forms a sigmoid curve. Nucleus prominent, 

 rounded, consisting of about one whorl and a half, covered with fine 

 spiral lines. 



