298 Proceedings of the Royal Physical Society ~ 



Aviculopecten, sp. ind. 



6)6s.— There is a single specimen of a large species of 

 Avicidopecten, with portions of the valves in apposition. It 

 is a mere cast with remains of shelly matter here and there, 

 but appears to correspond to a great extent with A. limce- 

 f or mis (Morris).* The shell is very jnequivalve, one valve 

 being moderately convex, the other almost flat, or even 

 towards the ventral margin a little concave. These features 

 are also to be seen in A. limceformiSj but the surface of the 

 cast of the convex and larger valve retains traces of almost 

 too many radiating ribs for the species. 



Loc. and Horizon. — Coral Creek, below Sonoma road- 

 crossing, in a deconjposed nodular ironstone of the Marine 

 Series (No. 121). 



Collector. — E. L. Jack, Esq., F.G.S. 



Genus Pterinea — Goldfuss, 1832. 



(Naturg. Atlasses, Th. iv., p. 73.) 

 Pterinea macroptera—^ovns. 



P. 7nacroptcra, Morris, Strzelecki's " Pliys. Descrip. N. S.Wales," etc., 1846, 



p. 276, t. 13, f. 2 and 3. 

 „ M'Coy, Annals Kat. Hist., 1847, xx., p. 299. 



„ Dana, Geol. U.S. Explor. Exped., p. 704. 



,, Grange, Dumont-d'Urville's *' Voy. au Pole Sud., Geol.," 1854, 



ii., p. 96. 

 Clarke, Southern Goldfields of N. S. Wales, 1860, p. 287. 

 ,, De Koninck, Foss. Pal. Nouv-Galles du Sud., 1877, pt. 3, 



p. 305, t. 16, f. 12. 

 ,, Etlieridge, jun.. Cat. Australian Foss., 1878, p. 77. 



„ Clarke, Sed. Formations, N. S. Wales, 1878, 4tli edit., 



pp. 122, 125, 141, etc. 



Ols. — Mr -Jack has forwarded a Pterinea, clearly this 

 species, but only one specimen, and that without a part of 

 the posterior wing. The small anterior lobe is only partially 

 preserved, the hinge line was clearly somewhat less than the 

 width of the shell, and there are distinct remains of concentric 

 laminse, although the specimen is only a cast. The cast of 

 one of the characteristic teeth is also preserved. 



IjOc. and Horizon. — Coral Creek, below Sonoma road- 



* strzelecki's " Phys. Descrip. N. S. Wales," etc., p. 277, t. 13, f. 1. 



