18 MR, FREDERICK CHAPMAN ON THE 



MiLiOLiNA POLYGONA, d' OrUgny sp. (Plate 2. fig. 29.) 

 Quinqueloculina polygojut, d'Orbigny, 1839, Foram. Cuba, p. 198, pi. 12. figs. 21-23. 

 Miliolma polygona, d'Orbigny sp.. Goes, 1896, Bull. Mus. Comp. Zool. Harvard, vol. xxi. 

 No. 1 (xx), p. 83, pi. 8. figs. 11-18. 



Af. polygona is a neat, short, multicarinate form, which appears to be new 

 to Australian Tertiary lists. In the living condition it is o£ fairly deep-water 

 habit. 



Occurrence. — Grice's Creek, very rare. 



MiLiOLiNA TRiGONULA, Lamarck sp. (Plate 2. fig. 30.) 



Miliolites trigonula, Lam., 1804, Ann. du Mus. vol. v. p. 351, No. 3 ; id., 1822, Anim. s. 

 Vert. vol. vii. p. 612, No. 3. 



Miliolina trigonula, Lam. sp., Howchin, 1889, Trans. E,. Soc. S. Australia, vol. xii. p. 2. 



The affinity of this species with the succeeding one, M. tricarinaia, is 

 somewhat close ; Af. trigonula being distinguished by the less regular 

 carination of the margins, and the comparatively strong inflation of the 

 penultimate and earlier chambers. 



Howchin records this species from both series at Muddy Creek ; Vine 

 notes it from the Port Phillip Tertiaries. 



Occurrence. — Grice's Creek, frequent ; Balcombe's Bay, frequent. 



Miliolina tricarinata, d'Orligny sp. (Plate 2. fig. 31.) 



Triloculina tricarinata, d'Orbigny, 1826, Ann. Sci. Nat. vol. vii. p. 299, No. 7 ; Modele, 

 No. 94. 



Miliolina tricarinata, d'Orbigny sp., Brady, 1884, Rep. Cball. vol. ix. p. 165, pi. 2. 

 figs, 17 c, 6 ; HovsTcHn, 1889, Trans. E. Soc. S. Australia, vol. xii. p. 2. 



The Australian Tertiary examples of the above species are exceedingly 

 large ; and although they are generally typical of the species, they have the 

 peripheral margins of the trihedral test less acute than the recent and fossil 

 specimens from the Northern hemisphere. 



Howchin records this species from both beds at Muddy Creek. Vine 

 mentions its occurrence in the Port Phillip Tertiaries. 



Occurrence. — Grice's Creek, common ; Balcombe's Bay, frequent ; Kacke- 

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



Miliolina vulgaris, d* Orbigny sp. (Plate 2. fig. 32.) 



QuinquelocuUna vulgaris, d'Orbigny, 1826, Ann. Sci. Nat. vol. vii. p. 302, No. 33, 

 Q. triangularis, d'Orbigny, 1826, ibid., p, 302, No. 34. 

 Q. auberiana, d'Orbigny, 1839, Foram. Cuba, p. 193, pi. 12. figs. 1-3. 

 Q, vulgaris, d'Orbigny, Schlumberger, 1893, M^m, Soc. Geol. France, vol. vi. p. 207, pi. 2. 

 fiigs, 65, 66, woodcuts figs. 13, 14. 



Of the several species grouped around M. seminulum as a central type, 

 this is perhaps one of the best defined forms. It is a constant and charac- 

 teristic species in the present series. The varieties with a sharp peripheral 

 edge agree with the published figures o£ M. auberiana. This form, under 



