A. E. Yerrill — Ilollusca of the New England Coast. 185 



tened and a little effuse anteriorly. Color white, below the brown 

 nucleus. 



Height, 2-2"""; breadth, 3-6'"'"; breadth of aperture, 2""". 



A young specimen, preserv-ed in alcohol, and apparently of the 

 same species, has a distinct epidermis, bearing small hair-like pro- 

 cesses, most prominent on the carinse. Its nucleus is somewhat 

 smaller than in the specimen described above, but has the same 

 form and color. 



Station 2076, N. lat. 41° 13', W. long. 66° 00' 50", in 906 fathoms 

 (No. ;J8,101); station 2084, N. lat. 40° 16' 50", W. long. 67° 05' 15", 

 in 1290 fathoms (No. 38,105). The young alcoholic specimen re- 

 ferred to is from station 2043, in 1467 fathoms, N. lat. 39° 49', W. 

 long. 68° 28' 30" (No. 38,104). Albatross, 1883. One specimen 

 was taken at each locality, 



Cithna(?) olivacea Verriii, sp. nov. 



Plate XXIX, figure 5. 



Shell thin, translucent, naticoid, as broad as high, subglobular, 

 with about four rapidly expanding, rounded whorls. Suture distinct, 

 scarcely impressed. Surface smooth, glossy, covered with a green- 

 ish yellow, thin, closely adherent epidermis. The upper whorls are 

 obscured by a thin, smooth, chitinous deposit, which also fills the 

 suture; beneath this the niiclear whorls appear to have a delicate 

 sculpture, consisting of two or more revolving cinguli crossed by 

 delicate lines of growth. Aperture very broad, ovate ; the outer lip 

 is evenly rounded, forming nearly a semicircle. Columella-lip nearly 

 straight, a little excurved in the middle, with the edge everted and 

 a little thickened, slightly effuse, and forming a distinct, rounded 

 angle and a rudimentary notch, where it joins the outer lip. The 

 inner lip is continued from the columella-margin to the outer lip by 

 a very thin smooth deposit of enamel, without a free edge. Spire 

 very short, apex obtuse. Umbilicus wanting. 



Length, 4™'°; breadth, 4™"^; length of aperture, 2'25™'" ; breadth, 



omm 



Off Martha's Vineyard, station 1154, in 193 fathoms, 1882. An 

 additional specimen from station 2084, in 1290 fathoms, 1883. 



Both specimens were without the animal, though fresh in appear- 

 ance. The affinities of this shell are, therefore, very doubtful. 



