The Older Tertiaries of Maude, etc. 191 



these, from six to eight still survive, and the percentage of 

 recent to extinct forms is thus aV)0ut one and a half." In the 

 list of fossils appended to Messrs. Tate and Deunant's paper, 

 there are only 250 mollusca from Muddy Creek, which is 

 obviously incomplete. Mr. Dennant, in a much earlier paper,* 

 refers 405 species of mollusca to the lower zone. There are at 

 least te)i recent species now known from these beds which gives a 

 percentage of nearly two and a half. It is not quite clear whether 

 the 511 species mentioned above is intended to indicate mollusca 

 only, but even if this should be the case, as is likely, we would 

 still have nearly two per cent, of living specie.s, which decidedly 

 indicates an horizon younger than the Spring Creek beds, and is 

 confirmatory cf the stratigraphical sequence already indicated. 



The section at North Belmont shows a resemblance tf) the 

 Spring Creek beds in the occurence of: — -Ciicullaea Corioensis, 

 McCoy, Trigonia seiiiiiiudulata, McCoy, Chione Pritchardi, Tate 

 /n.s., and Chione cainozoica, T. JVoods, and some common forms 

 of echinoderms and palliobranchs, and may tentatively at least 

 be placed on the same horizon until more evidence is forthcoming. 



According to Sir Alfred Selwyn,t the beds containing plant 

 remains pass under the marine tertiaries to the north of Maude, 

 but our stay was too short to allow us any time for examining 

 the evidence on this point. In the sections on Sutherland's 

 Creek, to the eastward of the first sections we mentioned, we 

 tind the ordoviciau rocks overlain by nearly 100 feet of quartzite 

 and sandstones. The grain of this rock is fairly tine, and we 

 found no trace of gravel oi- conglomerate in the beds. The 

 change from loose sand into fairly xoni pact sandstone, and then 

 into quartzite seems very irregular. At the point where the 

 ordovician is lost sight of as we go south, the overlying series 

 consists of a white or brown i-ock on which the hammer makes 

 but little impression, so tliat the alteration has been effectually 

 carried out. In some places higher up the stream the quartzite 

 may be traced up to the top of the deposit, whilst in others, the 

 upper part consists of loose .sand. It is not quite cleai- whether 

 the beds are the equivalents of the lower limestone of the 

 Moorabool Valley above described, or of the plant beds, though 

 the latter seems more probable. 



* Trans. Roj'. Soc. S.A., 1888, p. 39. et seq. 

 t Exhibition Essays, 186G-G7, pp. 21, et aeij. 



