160 Fossils from Australia. 



sion large and deeply excavate, scarcely marginal. Texture of shell 

 finely fibrous as in preceding species. — Length 3| inches; angle be- 

 tween cardinal line and line of elongation of shell about 32°. Resem- 

 bles much a Gerviliia in its oblique form. — Illawarra. 



47. AvicuJa ? — Very near A. volgensis of Verneuil, Russia, 



p. 473, pi. xli, fig. 13. — Specimen from Illawarra. 



48. Pecten comptus. — Suborbicular, costre 20 to 22, without mark- 

 ings, regular, prominent, low triangular with shallow concave furrows, 

 which have usually at middle a slender costa and one or two similar 

 less prominent either side ; ears rather large and longitudinally striate. 

 — -Length and height 2^ inches ; distance at lower margin between 

 middle of two costa) a fifth of an inch. Only one vaive was obtained 

 and that was convex. Near P. Fitloni of Morris, (Strzelecki, p. 277, 

 pi. 14, fig. 2,) but rays much more numerous. — Harper* s Hill. 



49. Pecten tenuicollis. — Nearly orbicular ; costae about twenty-four, 

 very slender and smooth with nearly flat smooth interstices having an 

 intermediate smaller costa. — Length of specimen 1| inch; height 1{ 

 inch nearly ; distance of middle of two costEe at lower margin about 

 f of a line. Only a single valve was obtained and that was very con- 

 vex. — Harper's Hill. 



50. Pecten leniusculus. — Large, nearly orbicular, one valve nearly 

 flat, the other convex ; flat valve having concentric undulations ; sur- 

 face very nearly smooth with fine obsolescent striations ; striations 

 more distant and rather more distinct on the convex valve ; ears large, 

 crossed obliquely by a few folds and striate longitudinally.— Length 

 and height 4£ inches ; thickness 1 J inch.— Illawarra. 



The following additional species of fossil shells from Australia in our 

 collections are described by Morris in Strzelecki's N S. Wales and 

 Van Dieman's Land, Mr. J. D. Sowerby in Mitchell's Australia, or 

 G. Sowerby in Darwin on Volcanic Islands. 



From Harper's Hill :— Bellerophon micromphalus (M.) ; Platy- 

 schisma oculus (J. S.) M., P. rotundatum (M.) ; Theca lanceolata (M.)] 

 bpinfer subradiatus (G. 5.); Eurydesma cordata (M.) ; Eurydesma 

 (Isocardia? J. D. S.) ; Pecten illawarrensis (M.) ; Pachydomus anti- 

 quatus (J. D. S.) M., P. cuneatus (J. D. S.) M., Conularia levigata, (M.) 



From Illawarra :— Pleurotomaria Strzeleckiana (M.) ; SpiriferDar- 

 winu (M.); S. subradiatus (G. &), S. avicula (G. &), S. vespertilio 

 (G. 5.); Productus brachythaerus (G. &); Allorisma curvatum (M.); 

 Orthonota (Cardinia) costata (M.) ; Pterinea macroptera (M.) 



Our collections contain also other undetermined species from these 

 localities, besides several species from Glendon, the species of corals 

 described by Lonsdale, and several new species of coal plants from 

 Illawarra and Newcastle. 



