200 RECORDS OF THE AUSTRALIAN MUSEUM. 



question arises : What are the generic relations of Pleurotomaria 

 carinata, Etheridge" (non Sby.), from the Gympie Series? 



So many of our Australian Permo-Carboniferous species were, 

 through necessity, described from imperfect materials, that it 

 becomes very difficult at times to identify more perfect specimens 

 with them, in the absence of the types. The disappearance and 

 loss through accident of many of the latter, has been a great blow 

 to Australian Paheontology. Dana's collection was burnt, so was 

 Clarke's third collection described by De Koninck, whilst Dain- 

 tree's is, I believe, somewhere at the bottom of the sea. 



Log. — AUandale, near Harper's Hill, near West Maitland, 

 New South Wales. Lower Marine Series. 



Genus Straparollus, De Montfort, 1810. 

 (Conch. Syst., ii., 1810, p. 174). 



Straparollus ammonitiformis, sp. nov. 

 (Plate xxxiii., figs. 1 and 2). 



Sp. Char. — Shell (partial internal cast) subdiscoid, with the apex 

 depressed, and the liase deeply umblicated. Spire very short, of 

 live or six whorls (as preserved); whorls non-overlapping, with a 

 sub-circular section in the young condition becoming transversely 

 oval in the more mature state, from a flattening of the sides ; 

 back round, no carinas ; each whorl on its upper side is somewhat 

 straight-walled around the suture, defined by a faint angulation. 

 Sculpture not preserved, but the surface showing traces of coarse 

 undulations of growth towards the terminal end. Size — 2|" x 2^." 



Obs. — The specimen is an internal cast wherever denuded of 

 matrix; but where enveloped, with the test preserved and inter- 

 vening. One more whorl certainly existed than those shown in 

 the illustration (Plate xxxiii., tig. 1), as indicated by the line of 

 junction running round both surfaces of the existing last whorl. 



The shell is a Straparollus of the depressed section, illustrated 

 by »S'. cequalis, Sby. It does not possess a plain keel on the upper 

 surface only, as in Euomphalus proper, or on both aspects as in 

 Schizostovia, or tuberculated keels on both aspects as in Phy- 

 matifer, nor is the coil open as in Phaneroiimis. It is a decided 

 addition to the lowest portion of the Permo-Carboniferous System 

 in New South Wales. 



S. arnmonitiforrnis was presented to the Trustees by Mr. 

 — . Thomas, through Mr. John Mitchell, Technical College, 

 Newcastle. 



Loc. — Duguid's Hill, near Harper's Hill, near West Maitland, 

 New South Wales. Lower Marine Series. 



6 Etheridge— Quart. Journ. Geol. Soc, xxviii., 1872, p. 331, pi. xv., f. 6. 



