256 PROCEEDINGS OF THE GEOLOGICAL SOCIETY.
57. ACTAEON HoCHSTETTERI, Sp. n. Pl. X. fig. 19.
Shell rather small, ovate ; whorls five ; spire rather elevated, acute ; whorls covered by close, distinct, encircling transverse striae, about thirty in number on the body-whorl, which is rather convex ; aperture not exposed.
In general appearance this shell is not unlike A. pullus, Lycett, but the striae with which it is ornamented are much more numerous. It is from Wollumbilla. It is named after Dr. P. von Hochstetter, who has published a valuable work on the geology of New Zealand.
Only one specimen is known.
58. Actaeon depressus, sp. n. Pl. X. fig. 20.
Shell small, conical ; spire with five volutions, rather depressed ; body-whorl with about fifteen rather distant striae ; aperture ovate.
Although this shell is not in good condition, it is clearly separable from A. Hochstetteri by its more depressed figure, and by the difference in the external striae. I have only seen one example, which is also from Wollumbilla.
59. Cerithium greenoughiensis, sp. n. Pl. X. fig. 22.
Shell small, narrow, tapering ; apex acute ; volutions 7-8, separated by a narrow encircling suture, and ornamented with short, straight longitudinal costae, bounding which are a row of nodulations.
In the block with Trigonia Moorei &c, from the Greenough district, Western Australia.
60. Delphinula reflecta, sp. n. Pl. X. fig. 21.
Shell rather small, turbinated; whorls 3-4; spire slightly elevated ; volutions separated by an encircling sinus ; body- whorl much increased ; aperture circular, with a thick reflected lip.
Only one specimen is known, the test of which is not in good condition. It is from Wollumbilla.
61. Dentalium lineatum, sp. n.
Shell tubular, rather thin, tapering and slightly curved. Three specimens occur with the Queensland series, all of which are from Wollumbilla.
62. Natica variabilis, sp. n. Pl. X. fig. 15.
Shell very thick, broader than high ; spire of 3-4 volutions, somewhat depressed; body-whorl increasing rapidly in size and extended; aperture ovate ; umbilicus small.
This species is abundant, and I have had an opportunity of examining specimens in various conditions. When the body of the shell has been worn, it presents a rugosely striated surface; but in smaller examples, in which the shell is usually better preserved, the test is seen to have a comparatively smooth striated exterior.
Loc. Wollumbilla.
