463 



siderabl)- broader tliaii [he striae, even near the l)ase, where they 'dvc. more crowd.-d. I 

 see about 13 raised striae, of whieh the uijper ones are lainici-, and, I diink 40 — ^o impressed 

 ones, the eoiuHtion of the shc-11 not allowin;^- a regular countini;-. Aperture elonj^Mtely-pear- 

 shaped, narrow above, shar[)ly angular at th(> summit, i-ounded below, j)eristome broken, its 

 contoiu- in accordance with the bod)-whorl, contracted above; cokimelhir side wiUi a (partly 

 removed) layer of enamel, the colimiella concave, thick, reflected over the umbilicus, as a 

 thick enamelled plait, nearly concealino- an und)ilical slit. 



Alt. 6, lat. 37,; apcrt. alt. 47,, hit. r'/, Mill. 



Though this specimen is in bad condition, its large size and ])articular characters, more- 

 over the great depth at which it has been dredged, induced me to describe it. I know no 

 species which is like it. 



Volvulopsis n. gen. 



Shell elongately-ovate, conically pointed above, rounded and but little contracted below, 

 last whorl forming practically the whole shell; spire a small, apparendy not pervious pit, 

 nearly concealed by enamel. 



Type: V. ancillarioides Schepm. 



This new genus has some resemblance with Volviila, but the spire is much less pointed, 

 the base more rounded ; unfortunately the soft parts are w^anting, so the systematic position 

 could not be ascertained as well as might be desirable. Under these circumstances I have 

 located the genus near the place occupied by Volvtda. 



I. Volvztlopsis ancillarioides n. sp. PI. XXXI, fig. 4. 



Stat. 52. 9°3'.4S., 1 19° 56'./ E. Savu-sea. 959 M. Globigerina ooze, i Spec. 

 Stat. 88. o°34'.6N., ii9°8'.5E. Makassar-strait. 1301 M. Fine grey mud. i Spec. 



Shell elongately-ovate, upper part much contracted, forming a short cone, with convex 

 sides, white, only one whorl visible, forming nearly the whole shell, but for a scarcely visible 

 top of the spire, which is encircled by a sharp xnargin, enclosing a small hole in one specimen, 

 nearly and probably always concealed by enamel, in the adult. Sculpture consisting of rather 

 remote lines of growth and crowded spiral striae, raised near the upper part, impressed 

 near the base and on the median part, where they are much fainter in one specimen (perhaps 

 by erosion). Aperture as long as the shell, ending above in a narrow^ canal; peristome broken, 

 slightly convex at the upper part, nearly straight lower on, running uninterruptedly in the 

 broadly rounded basal margin. Columellar side convex, with a conspicuous layer of enamel; 

 columella nearly straight, thickly enamelled, probably slightly truncated. 



Alt. 17, lat. 772; apert. lat. 4 Mill. 



The two specimens are somewhat different, that from Stat. 52 being a little more 

 convex, with somewhat stronger sculpture; as both specimens are more or less defective, this 

 latter character may depend on the state of preservation. Though it was impossible clearly to 

 define every character, the species is too remarkable to be neglected. 



