456 Transactions. 



nearly effaced on the upper part of each whorl. Spire elevated, conical, 

 about equal in height to the length of the aperture. Whorls 5 ; outlines 

 slightly convex, but slightly concave above the angle of each whorl. Suture 

 distinct. Aperture subvertical, oval. 



One specimen. Type in the Otago Museum. 



This species closely resembles the Recent species C. lurida, but its costae 

 continue farther forward and are less numerous- — 9 in a whorl in place of 12. 



Cossmann records no species from any horizon below the Palaeocene, 

 but Wilckens describes a species from the Upper Cretaceous of south Pata- 

 gonia. 



Phos ordinarius n. sp. (Plate XXXV, figs. 24, 25.) 



Shell of moderate size, 17 mm. by 7 mm., turriculate, axially costate 

 and spirally striate. Spire of 4 whorls, each strongly convex, and show 

 costae and striae. The costae are continuous from suture to suture, but they 

 are far more pronounced near the middle of each whorl than near either 

 septum. Eighteen costae on the body-whorl ; costae crossed by numerous 

 spiral threads about as wide as the intervals between them. Spire longer 

 than aperture. Suture not deep. Aperture slightly oblique, with a short 

 broad canal which is turned slightly to the left. Columella with a slight 

 anterior fold. 



Suter remarks that this species closely resembles P. tenuicostatus Ten.- 

 Woods, which is a Recent species. 



The genus Phos has a wide distribution. It appears to be restricted 

 to the Tertiary. Cossmann mentions a Tasmanian species from the Eocene, 

 but according to the latest researches the actual horizon seems to corre- 

 spond with the Oligocene. In Europe the genus makes its first appearance 

 in the Eocene. 



Several specimens. Type in the Otago Museum. 



Phos conica n. sp. (Plate XXXV, figs. 26, 27.) 



Shell small, 10 mm. by 5 mm., oval, vertically costate and spirally lirate. 

 Costae not prominent ; about 17 on each whorl, extending from the anterior 

 suture of each whorl almost to the posterior one. Spiral ribs rather wider 

 than the grooves and moderately sharp. Seven of the spiral lirae on the 

 penultimate and 18 on the body-whorl. Spire composed of 4 whorls, rather 

 short, conical, but whorls rather convex. Suture impressed. Aperture 

 oval ; anterior canal slightly bent to the left. 



Several specimens, in a moderately good state of preservation. Type 

 in the Otago Museum. 



Turris multicinctus, n. sp. (Plate XXXV, fig. 32.) 



Shell small, turriculate, nodulous. Spire long. Sculpture : a large 

 number of spiral cinguli, amounting to 15 or 20, in the lower whorls ; the 

 cinguli are rounded, and about equal in size to the intervening grooves. 

 Nodulous costae 10 in number on each whorl ; the size of the costae 

 diminishes at a point about a quarter of the length of the whorl below 

 the upper suture, then greatly increases to the middle of the whorl, and 

 diminishes again to the lower suture. Growth-lines distinct on the body- 

 whorl ; they are bent backwards, with the apex of the bend on the 

 nodulous projection of the costae. Canal not complete. 



One specimen. Type in the Otago Museum. 



