Cyclostretna, Adeoi'bis, Vttrinella, and related genera. 137 



Leptogyra inconspicua sp. nov. 



Shell consisting of about 2^ whorls, forming a little elevated spire 

 with very obtuse apex (the nuclear whorl being coiled on the same 

 plane as the succeeding one). Surface nearly smooth, slightly lus- 

 trous, having, besides the delicate microscopic growth lines, irregu- 

 larly dispersed, ill-defined, sinuous wrinkles extending from the 

 suture a little way below the summit of the whorls. 



Greatest diameter, about 1 -3™'" ; height, about •8'""\ 



Two live specimens, station 2174. 



Leptogyra eritmeta sp. nov. 



Shell consisting of three whorls which are more loosely coiled than 

 in either of the preceding species, causing the spire to appear more 

 elevated and the suture not so deep. Nuclear whorl very prominent. 

 Surface below the nucleus, crossed by prominent, regular, evenly 

 separated lines or threads which extend from suture to suture and 

 over the base well up into the umbilicus, but are not so conspicuous 

 here as on the upper part of the whorls. Under a high power, the 

 summit of these appears uneven or very inconspicuously serrate. 



Greatest diameter, about 1-5™"^; height, about 1™°^. 



One live specimen, station 2174. It is an interesting fact that all 

 three species were found at the same station. 



MoUeriopsis gen. nov. 



Shell small, relatively thin, white under a golden brown or olive 

 brown epidermis. Whorls few, convex, forming an elevated spire 

 and large body-whorl. Suture distinct. Umbilicus of moderate 

 size, round, deep, showing some of the whorls. Aperture circular, 

 slightly oblique ; peritreme continuous with a thin, sharp edge, 

 appearing thickened within, attached to the body-whorl only for a 

 short distance. Animal and operculum not known. 



This genus is proposed for a very deep-water shell which closely 

 resembles 31. costiilata (Moller) Jeffreys, the type of the genus 

 Molleria, in several features, as the form of the aperture and peri- 

 treme and especially in the conspicuous carination of the base 

 bordering the umbilicus ; but differs from that rather solid, strongly 

 sculptured species in being much larger, of more delicate texture, 

 with a nearly smooth surface. The Cyclostrema sulcatum Watson 

 {non A. Adams, l^oO) = ^Vatsom Tryon, 1888 (Report Voy. Chal- 

 lenger, Zool. Scaphopoda and Gasteropoda, xv, p. 121, pi. viii, fig. 11, 



