TERTIARY FORAMINIFERA OE VICTORIA. 23 



Cornuspira invohens, Reuss sp., Brady, 1884, Rep. Chall. vol. ix. p. 200, pi. 111. 

 figs. 1-3 ; Rupert Joues, 1895, Pal. Soc. Mon. Foram. Crag, p. 128, pi. 3. figs. 52-54, 

 woodcuts figs. 11 «, b ; Howchin, 1889, Trans. R. Soc. S. Australia, vol. xii. p. 4 ; Millett, 

 1898, Journ. R. Micr. Soc. p. 612. 



Of the two forms of this species usually found associated in the same 

 deposit, that which has the most numerous convolutions is figured here. It 

 probably represents the microspheric stage of this species; whilst the other, 

 with a conspicuous, spherical initial chamber, as Millett remarks respecting 

 the recent examples from the Malay Archipelago, represents the megalospheric 

 form. The microspheric (B) form is twice as abundant as the megalospheric 

 (A) form in the present series. 



Howchin records this species from the Lower Bed at Muddy Creek, and 

 Watts from Balcombe's Bay. 



Occurrence. — Grrice's Creek, very common; Kackeraboite Creek, common. 



Cornuspira striolata, Brady. (Plate 3. fig. 47.) 



Cornus'pira striolata, Brady, 1882, Proc. Roy. Soc. Edin. vol. xi. p. 713 ; id., 1884, Rep. 

 Chall. vol. ix. p. 202, pi. 113. figs. 18, 19. 



C.foliacea, Philippi sp. {pars), Howchin, 1889, Trans. R. Soc. S. Australia, vol. xii 

 p. 4 [immature examples]. 



C. striolata, Brady, Goes, 1894, Kongl. Svenska Vetensk. Ak. Handlingai', vol. xxv 

 No. 9, p. 107, pi. 48. fig. 835. 



G. invohens, Reuss sp., " striated var.". Vine, 1898, Trans. & Ann. Rep. Shefiield Micr. 

 Soc. p. 9. 



The majority of the specimens referred to the above species are not fully 

 developed; that is to say, they do not exhibit the peripheral expansion and 

 reflexure of the last-formed whorl seen in the recent examples. It was only 

 by the fortunate discovery of a few examples out of many hundreds examined 

 that the doubts relating to their specific identification were removed. In his 

 description of C. foliacea, Howchin remarked as follows: — "It is worthy of 

 note that all the specimens, which are more or less weathered, show a fine 

 surface ornamentation resembling C. striolata, Brady." The mature forms 

 found in the present series show the striated surface to be due not to 

 weathering, but that they are actual markings on the original surface of the 

 test. Other specimens in our series show an initial stage of the peripheral 

 reflexion by the formation of a compressed trumpet-shaped mouth; and in 

 fact, a graduated series might be arranged from one end to the other. 



C. striolata is remarkable for its strictly northern distribution in the living 

 condition, as far as its geographical range is at present known; the localities 

 being, Faroe Channel, " cold area," 540 fathoms, and the Siberian Sea, 

 150 metres. As a fossil this species has been found by Howchin in the 

 Lower beds of Muddy Creek (as C. foliacea in part), and by Vine in the Port 

 Phillip Tertiary deposit (as C. invohens striated var.). 



Occurrence. — Grrice's Creek, frequent; Balcombe's Bay, common; Kackera- 

 boite Creek, rare; Altona Bay Coal-Shaft, very common. 



