A. E. Verrill — Molhiscn of the Neio England Coast. 165 



also resembles Spirotrojns ephaniilla, but the latter has a deeper 

 notch, more remote from the suture, its subsutural band is broader, 

 and the shoulder of the whorls less marked, while the canal is longer 

 and more constricted at its base. 



RACHIG-LOSSA. 



Marginella borealis Verriii, sp. qov. 



Marginella earnea Verrill, Catal. Mar. Moll., Trans. Coan. Acad., v, p. 489, (rwn 



Storer.) 



Plate XXIX, figure 4. 



Shell of medium size, solid, smooth, somewhat shining, with a 

 rather elevated, acute spire, showing all the whorls, of which there 

 are about five. Last whorl somewhat swollen, wath a slightly prom- 

 inent, rounded shoulder, considerably below the suture. 



The whorls of the spire increase regularly in size and are slightly 

 convex ; the nuclear whorls are smooth, polished, shining, evenly 

 rounded. Suture distinct, though filled up with the thin coating of 

 enamel that covers the spii'e, but does not conceal its structure. The 

 aperture is narrow, expanding a little anteriorly, towards the canal, 

 which is evenly rounded at the tip. The outer lip is thickened by a 

 stout rib, evenly rounded externally, and faintly crenulated on the 

 inner margin, especially on the anterioi; half. Tlie posterior sinus is 

 distinctly marked as a smooth, rounded groove, surrounded by callus, 

 at the junction of the lip with the body-whorl. The inner lip has a 

 conspicuous, raised, ovate patch of white callus along the posterior 

 half, covering the adjacent portion of the body-whorl, and extending 

 backward more or less on the spire ; on the anterior half there are 

 four oblique, stout, prominent ]>lications, nearly equal in height ; the 

 most anterior of these is formed by the twisted inner edge of the 

 columella, forming the inner border of the canal ; the most posterior 

 is less oblique and often a little smaller than the others. The callus 

 extends along the lower lip, outside of the plications, to the anterior 

 border of the canal, sometimes, when best developed, forming by its 

 outer margin a slight groove. Shell yellowish flesh-color, varied with 

 whitish ; sutural lines, callus deposits, plications, and inner margin 

 of the outer li[), white; external surface of the thickened outer lip 

 usually with three orange-yellow spots, the largest of which forms a 

 narrow, elongated patch along the anterior and outer border of the 

 canal, extending somewhat backward along the lip ; the next is usually 

 a broader, oblong patch, just below the shoulder ; the third is a 

 small, rounded spot close to the suture. Frequently the anterior 



