364 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



ing grooves, which are interrupted on the costa, but distinct in the in- 

 tervals; on the upper whorls there are about five; and on the lower 

 half of the last whorl usually five or six distinct and continuous ones. 

 Aperture broad oval, anteriorly rounded and slightly effuse ; outer lip 

 thin, sharp; columella nearly straight at base within, slightly revolute 

 outwardly, regularly curved anteriorly where it joins the outer lip, and 

 not forming an angle with it. The epidermis is thin, light yellow, 

 sometimes with a darker, yellowish, revolving band on the middle of the 

 last whorls, and also with the revolving striae darker. 



Vineyard Sound, 6 to 10 fathoms; Long Island Sound, near New Haven? 

 5 fathoms. 



TURBONILLA AREOLATA Veirill, Sp. nov. 



Shell small, slender, with eight or more whorls, slightly obelisk- 

 shaped, owing to the more rapid narrowing of the upper whorls ; apical 

 or nuclear whorl very small, reversed ; the other whorls are moderately 

 convex, somewhat flattened in the middle, and crossed by numerous 

 rather crowded, narrow, transverse costa3, of which there are twenty- 

 five or more on the lower whorls ; interstices interrupted by numerous 

 rather conspicuous, revolving, impressed lines, of which there are about 

 six on the upper whorls ; these divide the interstices into series of 

 pretty regular, small, squarish pits, but do not cross the costie; the body- 

 whorl is subangulated below the middle, where the costre disappear, 

 below which the base is marked only by fine revolving lines; suture 

 impressed. Aperture oval, acute posteriorly, rounded and slightly 

 spreading anteriorly; outer lip sharp, thin, slightly angulated below 

 the middle, rounded and slightly effuse anteriorly; columella smooth, 

 somewhat curved, scarcely forming an angle at its junction with the 

 outer lip. Length, 4 mm ; breadth, 1.5 1 " 1 ". 

 Long Island Sound, near New Haven. 



The crowded costa3 and numerous spiral lines produce a closely can- 

 cellated appearance, which is sufficient to distinguish this from the two 

 preceding species. From the following it differs much in sculpture, 

 form, shape of aperture, and columella, and especially in the minute 

 size of the apical whori. 



TURBONILLA COSTULATA Verrill, sp. uov. 



Shell small, long conical, translucent, glossy white, banded faintly 

 with .pale brown, subacute, with a relatively large, smooth, reversed 

 apical whorl ; the other whorls are six or more, flattened, and but 

 slightly convex, enlarging regularly, crossed by numerous straight, 

 smooth, rounded, transverse costre, of which there are upward of twenty 

 on the lower whorls ; interstices rather narrower than the costre, deep, 

 and interrupted by numerous very minute revolving lines, which are 

 scarcely visible under an ordinary pocket-lens, and do not cross the 

 costai; suture impressed. The body-whorl is subangulated below the 



