—_— FOSSILS OF NEW SOUTH WALES. 707 
75. Purvroromarra SrrzEveckrana (Morris).—This large species was found abun- 
dantly in the Illawarra sandstone, but no Glendon or Harper’s Hill specimens were met 
with by the writer. 
Pleurotomaria Strzeleckiana, J. Morris, loc. cit. 287, pl. 18, fig. 5. 
76, Puaryscuisma ocutus (Morris).—This species is somewhat rounded conical, the 
larger spire a little depressed, and the angle of the spire about 90°. Our specimens are 
from Harper’s Hill. The greatest diameter of any specimen observed was 3g inches.— 
Plate 10, fig. 1, represents a depressed specimen, believed to be of this species ; it was 
probably distorted by pressure. 
Platyschisma oculus, J. Morris, loc. cit., 286, pl. 18, fig. 1. 
77. Puaryscuisma RrotunpDatum (Morris)—Not uncommon in the sandstone of 
- middle and southern Illawarra, 
Platyschisma rotundatum, Morris, 286, pl. 18, fig. 2. 
78. PLaryscnisMA pEPREssUM (Dana).—Large, suborbicular, very much depressed, 
almost disk-form, angle of spire about 140°, Whorls 3 or 4, each much flattened, 
separated by a suture ; the back of the outer whorl, half an inch wide and round-truncate. 
Surface unevenly and coarsely marked with strive of growth.—Diameter 43 inches.— 
Plate 10, figs. 2 a, 6, different views, natural size. 
Harper’s Hill. 
This species differs widely from the ocv/us in its very depressed form, and flattened 
whorls, the outer of which has the back subtruncate. 
Platyschisma depressum, Exped. Foss., Amer. Jour. Sci., ii. Ser., iv. 151. 
79, NarTica ? Plate 10, fig. 8, natural size. From Hlawarra, Our specimens 
are too imperfect to be satisfactorily characterized. 
~ 
80. BrLLEROoPHON UNDULATUS (Dana).—Scarcely compressed, back of whorls 
rounded, surface smooth, having a series of distant plications crossing the back parallel 
with the lines of growth, (nearly V-shape, the lower angle being rounded ;) plicze most 
abrupt on the posterior side, and becoming obsolete laterally. Aperture deltoideo-lunate, a 
little dilated either side.—Diameter ¢ inch; thickness through the centre g inch.—Plate 
10, fig. 4, a, 0. 
Harpeyr’s Hill, 
There are about four plications on the back in a distance of half an inch. 
Bellerophon undulatus, Exped. Foss., Amer. Jour. Sci., ii. Ser., iv. 151. 
81. BeLLEROPHON sTRiIcTus (Dana).—Discoid, much compressed, smooth ; back of 
whorls rounded. Aperture very narrow, compressed lunate, not laterally dilated.—Dia- 
meter 7 inch; thickness at middle half the diameter.—Plate 10, figure 5, a, 0, different 
views, natural size. 
Wollongong, District of Illawarra. 
