184 A. K Verrill — Jlollusea of the Neio Englaiid Coast. 

 Cithna tenella, var. costulata Jeff. 



Lacuna tenella Jeffrejs, Brit. Couch., p. 204, pi. 101, fig. 7. 



Cithna tenella, var. costulata Jeffreys, Proc. Zool. Soc. London, 1883, p. 110. 



This species was taken at station 2038, N. lal. 38° 30' 30", W. 

 long. 69° 08' 25", in 2033 fathoms (No. 38,069). One living specimen. 



It has been taken on the European coasts at several localities, in 

 114 to 2050 fathoms, from ofl' the Faroe Islands to the Azores and 

 Mediterranean. It was taken off Pernambuco, Brazil, and east of 

 Japan by the Cliallenger (Jeffreys). It occurs in the Pliocene of 

 Sicily and Calabria, according to Jeffreys. 



Cithna cingulata Verriii. sp. nov. 



Plate XXXII, figure 7. 



Shell small, rather solid, depressed, with a low spire, and angu- 

 lated, spirally striated Avhorls. Rase broad, convex ; umbilicus 

 small and deep. The nucleus is relatively large, nearly smooth, 

 glossy, deep chestnut-brown, composed of about three rapidly in- 

 creasing whorls, the last of which is finely spirally striated ; the 

 apical whorl is minute and regularly coiled, not prominent; the 

 change from the nucleus to the normal whorls is abrupt. Aside 

 from the nucleus, there is rather more than one whorl, which 

 increases rapidly and constitutes the bulk of the shell; this whorl is 

 very convex at the periphery and more or less distinctly bicarinate ; 

 one carina surrounds the periphery ; the other at a short distance 

 above this forms a slight, rather indistinct shoulder ; the band 

 between the upper carina and the suture is slightly convex and joins 

 the preceding whorl nearly at right angles, bending inward at the 

 suture so as to form a narrow and rather deep sutural groove. The 

 whole surface, below the nucleus, both above and below, is covered 

 by numerous, pretty regular, close, spiral cinguli, separated by 

 grooves of about the same breadth on the periphery, but more 

 crowded on the base ; the surface is also roughened by fine and 

 minute lines of growth. On the last whorl there are four or five cin- 

 guli between the carinte. The umbilicus is regular, somewhat fun- 

 nel-shaped, narrow and deep. The aperture is rather large, roundish, 

 with the anterior and inner borders slightly patulous, and the outer 

 border expanded and more or less angulated at tlie carin:^; the 

 inner lip is continuous, with a distinct edge along the narrow pai't, 

 which is attached to the pillar. Columella-margin somewhat fiat- 



