212 A. E. Verrill — Mollusca of the Neio England Coast. 



The spire is small, scarcely obliqiie, slightly elevated, its apex not 

 rising above the level of the last whorl. Suture of the last whorl, well 

 marked. The umbilicus is small, and shows within it only about one 

 and a half whorls. The extreme apex is smooth, but the succeeding 

 two or three whorls are covered with four or five well marked, revolv- 

 ing lines, which fade out on the penultimate whorl. The last wdiorl, 

 which constitutes the greater part of the shell, is a little inflated on 

 the ventral side, with the sides slightly convex and the dorsal por- 

 tion compressed ; its surface is polished and marked by faint lines of 

 growth, and sometimes shows faint, microscojiic, spiral lines on the 

 left side. The aperture is nari'ow-ovate, acute above and rounded 

 below. The notch is rather wide and moderately deep. 



Color, transparent white, with a faint, chestnut-brown, sutural line. 

 In alcohol the animal show^s several very distinct black spots. 



Diameter, about 1-25""". 



Taken in abundance, from the surface, at station 2100, off Delaware 

 Bay, N. lat. 39° 22', W. long. 68° 34' 30", October 3rd, 1883 (No. 

 38,397), with the temperature of the surface water 69° F.; and in 

 smaller numbers at station 2038, N. lat. 38° 30' 30", W. long. 69° 08' 

 25", July 26th, 1883 (No. 38,410), temperature of the surface water 

 76-5° F. 



This minute shell is easily distinguished from onr other species by 

 its compressed form, with closely coiled whorls and small, erect spire, 

 and especially by the distinct spiral sculpture of the earlier whorls. 

 It appears to be the most abundant species off our northern coast. 



Firola Keraudrenii Eyiioux and souieyet. 



Voyage de la Bonite, Zool., vol. ii, p. o4.9, atlas, pi. 16, figs. 8-10, 1852. 



Station 2038, N. lat. 38° 30' 30", W. long. 69" 08' 25", twciity-tive 

 living; station 2039, N. lat. 38° 19' 26", W. long. 68° 2o' 20", five 

 living. Also at other stations, usually in company with Sag'Uta. 



PTEROPODA. 

 Cavolina quadridentata (Lcs.) 



Ilyalijea quadridentata Rang and Soiiloyet, Hist. Nat. Moll. Pteropodos, p. ;{9, pi. o, 

 figs. 13-15. 

 Souieyet, Voy. de la Bonite, vol. ii, p. 147, atlas, pi. 4, tigs. 25-32, 1852. 



Station 2043, N. lat. 39° 49', West long. 68° 28' 30", (No. -34,878) ; 

 station 2084, N. lat. 40° 16' 50", W. long. 67° 05' 15", (No. 38,260); 

 and station 2109, N. lat. 35° 14' 20", W. long. 74° 59' iO", (No. 38,252). 



