188 Frederick i'kapman : 



Diin('H'<i()iiK. — Heip:ht from base of the spines, 9 mm. ; greatest 

 breadth, to extremities of s])ines, 34.5 mm. ; breadth of last Avhorl, 

 10.25 mm. 



Observations. — This handsome shell is closely allied both to As- 

 tralium {Iniperdtor) heUotropxum, Martyn ( = iinperiale, Chemnitz)^ 

 f(mnd living round New Zealand ; and the janjukian species from 

 Table Cape, Tasmania, A. (I.) Jiudsonianu/t/, Johnston sp.2 From 

 the living species the present form differs in having fewer spines, 

 and in the absence of the centrifugally striate surface, excepting to 

 a partial extent on the spines alone. The other, fossil form, from 

 Table Cape, is a heavier and stouter shell with a large' number of 

 spines and strongly centrifugal ornament as in A. (I in p.) lielia- 

 tr opium. 



Occnrreiire. — Teritiary ; balcombian series. In the Ijlue clays of 

 the Altona Bay Coal-shaft. Coll. bv Mr. J. S. Green. 



Genus Tui'^bO, Linnaeus. 

 Turlio cthcrulgri , Tenison Woods. 



Turbo etlieridgei, Tenison Woods, 1877, Proc. lioy. .Soc, Tasmania, 

 for 1876, p. 98 . 



Obiter ratio IIS. — This hitherto restricted Table Cape fossil has now 

 occurred in the Flemington tertiary ironstone beds. This record 

 forms an additional and valuable piece of evidence as to the age of 

 these beds, which have hitherto been regarded by some authorities as 

 balcombian, but which, from the prevalence of restricted species of 

 the janjukian fauna, the writer would relegate to the latter horizon. 



Occurrence. — Tertiary; janjukian series. Ironstoue beds at Flem- 

 ington Railway cutting, Melbourne. A mould of the shell. I're- 

 sented by Mr. H. Ford, Station Master, Flemington Bridge Railway 

 Station. 



Turbo afkiiixoiii, Pritchard. 



Turbo afkiiisoii'i. Pritchard, 1896, Proc. Roy. Soc, Vict., vol. YIII. 

 (N.S.), p. lis, pi. 111., tig. 12. 



Obarrvatiowi. — J3oth the al)ovc and the i>resent species arc found 

 at Table Cape. A loniparatively long series in the Dennant col- 

 lection shows all gradatitnis, from a shell with stepi)ed whorls to 

 tliat with straight sides. The chief distinctions of T. atkinsoni are 

 the even contour and the broad, sul)carinate base. In the National 

 Museum collection there is a specimen of this subspecitic form in 



J M;u-t.vii, <oii. Icon., 1784, fig. 3(1. Tryoi), Man. Conih., vol. \:.. ISSS, p. 228, pi. hi., tiy. ST. 

 2 Oeol. of Tiisniania, 1888, pi. x\ix., ti^'s. 12, 12(( (fiy:urfs onl.v). Uescribed bv G. B. Pritchard, 

 Proc. Ilo.v. So(\ \'ict.., vol. viii. (ii.s.), ls<)(i, p. lUi, undei- the name of .Istniliinii { I inp.mtoi) 



jlllimlnui. 



