Little-known Victorian Fossils. Ill 



slightly salient on the dorsal edge of the valve. The curved 

 Tjorder has a raised marginal rim. 



Measnrenmits. — Length, 2.08 mm.; height, 1.08 mm. Pro- 

 portions, 25 : 13. 



Observations. — The above species shows some relationship to 

 the well-known B. kloedeni, which we have now recorded from 

 Victoria, and more especially to the variety described and figured 

 by Jones and Holl as var. intermedia of that species,^ the chief 

 difference being the larger development of the gigot lobe with its 

 vertical sulcus in B. wooriyallockensis. The valve in the latter 

 form is also much longer in proportion to its breadth, and the 

 lobes are distinctly coalescent. Another form to wliicli our 

 specimen at first sight shows affinity is B. admixta, Jones and 

 Holl,''' especially with regard to the prominence of the free ends 

 of the lobes ; the hind lobe in the Victorian species, however, is 

 of t]uite a different form, and is not adpressed to the hinder 

 curved border of the valve. 



Locality and Horizon. — Found at the junction of the Woori- 

 Yallock and Yarra Rivers, east of Melbourne. Collected by 

 Geol. Surv. Vict. B. 23. [446]. Silurian. 



Beyrichia maccoyiana, Jones, var. australice, nov. 

 (PI. XVI., Fig. 7). 



Description. — This variety is distinguished from the type species 

 'by the narrower form of the antei'ior and middle lobes. In the 

 present variety the hind or gigot lobe is divided by a vertical 

 sulcus ; also the area in proximity to the curved border is less 

 ■encroached upon by the front lobe, and the frill on the ventral 

 ■ edge is consequently more conspicuous. 



Observations. — A species of Beyrichia described by Krause 

 from the Lower Silurian (Ordovician) Clays of the Baltic area, 

 •namely, B. marchica^ bears a slight affinity to our form, but the 

 difference in the position of the lobes is very marked. 



Locality and Horizon. — Junction of the Woori-Yallock and 



1 Ann. Matf. Nat. Hist., series 5, vol. xvii., 1886, p. 352, pi. xii., %8. 3, 4. 

 •2 Ann. Mag. Nat. Hist., series 5, vol. .wii., 1886, p. 359, pi. xii., fig. 5. 

 3 Zeitschr. dcutsch. Gesellsch., 1889, p. 19, pi. ii., figs. 10, 11. 



