84 Proceedings of the Royal Society of Victoina. 



McCoy apparently had this species under a different name in 

 manuscript prior to his description of the species, for in the 

 Exhibition Essays, 1866-67,^ he remarks, "Amongst the singular 

 forms in these Australian tertiary beds recalling oolitic European 

 ones is a Pleurotomaria (P. Australis, McCoy), as large as the 

 mesozoic Pleurotomaria Anglica." 



The description given by McCoy of tlie type of this species is 

 as follows : — " Shell large, trochiform, apical angle 67°; whorls 

 flat, or very slightly convex ; base moderately convex, with (?) a 

 small umbilicus ; band of moderate width in the middle of each 

 whorl, slightly depressed. Surface with sub-equal prominent 

 thread-like spiral striae, rather less than their thickness apart 

 (about 10 or 11 above, and the same number below the band), 

 about 3 slightly smaller on the Ijand, reticulated by arched striae, 

 narrower, but nearly as prominent as the spiral striae, and 

 slightly further apart. Length about 2 inches 9 lines ; propor- 

 tional width, yVo J l^iigth of last wiiorl, y^V- ' 



An examination of the type and only specimen of the species 

 possessed V)y the JSTational Museuin, Melbourne, shows it to be 

 only poorly preserved, and considerably chipped in the removal 

 of the matrix ; and unfortunately McCoy saw lit to figure a 

 restoration and not the actual specimen, with the result that the 

 figure is inaccurate in several details, and the enlargement of the 

 sculpture is very misleading. 



The figures then not being exact, and the description being 

 very brief and too general, new species might very easily have 

 been made out, but for the type being accessible. 



A well-preserved specimen, but unfortunately .somewhat broken 

 about the apex and aperture, has been very kindly lent to me by 

 the Rev. A. W. Cresswell, M.A., and proves to represent P. terti- 

 aria, McCoy ; the exact locality from which it was obtained has 

 been forgotten, but judging by the calcareous sandy clay matrix, 

 and since it was thought to come from the Geelong District, 

 there is very little doubt but that the specimen was obtained 

 either from the lower portion of the Moorabool Valley or perhaps 

 from Corio Bay. 



1 Essay, No. 7, Rec. Zool. and Pal. of Vic, p. 18. 



