256 PROCEEDINGS OF THE GHOLOGICAL SOCIETY. 
57. Actmon Hocusrerrert, sp.n. Pl. X. fig. 19. 
* Shell rather small, ovate; whorls five; spire rather elevated, 
acute; whorls covered by close, distinct, encircling transverse striz, 
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 striz with which it is ornamented are much more numerous. 
It is from Wollumbilla. Jt is named after Dr. F. von Hochstetter, 
who has published a valuable work on the geology of New Zealand. 
Only one specimen is known. 
58. AcTHON DEPRESSUS, sp. n. Pl. X. fig. 20. 
_ Shell small, conical; spire with five volutions, rather depressed ; 
body-whorl with about fifteen rather distant strie ; aperture ovate. 
Although this shell is not in good condition, it is clearly separable 
from A. Hochstettert by its more depressed figure, and by the differ- 
ence in the external striz. I have only seen one example, which is 
also from Wollumbilla. 
09. CERITHIUM GREENOUGHIENSIS, sp. n. Pl. X. fig. 22. 
Shell small, narrow, tapering; apex acute; volutions 7—8, sepa- 
rated by a narrow encircling suture, and ornamented with short, 
straight longitudinal coste, bounding which are a row of nodula- 
tions. 
In the block with Trigonia Moorei &c., from the Greenough dis- 
trict, Western Australia. 
60. DELPHINULA REFLECTA, sp.n. Pl. X. fig. 21. 
Shell rather small, turbinated; whorls 3-4; spire slightly ele- 
vated; 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. DrenraLium LINEATUM, sp. 0. 
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 exa- 
mining 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. 
