BY R. ETHERIDGE, JUNR. 537 



just named I now find comes from a much lower horizon than I 

 thought in 1880, and is probably from one of our Siluro-Devonian 

 Limestones, although I then doubtfully referred it to the Car- 

 Ijoniferous. This fact, however, tends to point out the persistence 

 of the type. 



Loc. and Horizon. — Rockhampton District (^C. W. De Fis, Colin. 

 De Vis). Gynipie Series. 



Family^BELLEROPHONTID^. 



Genus — B e l l e r o p h o x, De Montfort, 1 808. 



(Conch. Systematique, 1. p. 51.) 



Bellerophon, sp.ind. 



(PI. XXXIX. fig. 8.) 



Obs. — A small and well marked form occurs in limestone, but 

 unfortunately only the back is visible. A raised, square-edged 

 keel exists, bearing traces of recurved stria?. The back and sides 

 are crossed by sharp, straight, transverse ribs, with here and 

 there a few faint intervening stride. Apparently the umbilicus 

 was overlapped by an alar expansion. The characters of this 

 specimen indicate the group of B. tangentialis, Phill., as its resting 

 place, particvilarly the subimbricating costcie at right angles to the 

 keel. A resemblance is also borne to B. stanvellensis, mihi,* 

 more particularly from traces on cme side of an alar expansion of 

 the inner lip. 



Loc. and Horizon. — Rockhampton District (C. W. de Vis, 

 Colin, de Vis). Gympie Series (in limestone). 



*Geol. Pal. Queensland, &c , 1892, t. 15, f. 11-13. 



37 



