146 Chapman, Fossils from Grange Burn. [voi IC xxxii 



and tapering to a moderately sharp apex at the aboral end ; 

 compressed, with rounded edges. Sutures textularian, fairly 

 distinct ; chambers moderately long, sutures oblique. Lateral 

 faces slightly depressed along the median axis and ornamented 

 with numerous fine, raised striae, more or less parallel. 



Length, 2.07 mm. ; greatest width, near oral end, .73 mm. ; 

 thickness of test, .23 mm. 



Observations. — At first sight this ornamental little species 

 suggested the complanate form of Polytnorphina from the 

 English (rag (Pliocene), described by Searles Wood as P. 

 frondiformis.* A close examination, however, shows our species 

 to belong to the genus Bolivina, since the chambers are regularly 

 disposed in the textularian manner, and the aperture is 

 excentric. The nearest analogue is Bolivina nobilis, Hantken.f 

 a species which is found throughout our Tertiary beds and is 

 even living at the present day in the Southern Ocean. The 

 new species is extremely broad as compared with von Hantken's 

 form, whilst the striae are more pronounced, closer together, 

 and continuous from end to end of the test . 



Holotype in the National Museum. 



POLYZOA. 



A species occurring in this series of fossils worthy of special 

 notice is Lekythopora. Its nearest related form is /.. kitsoni, 

 Maplestone, which was described from the J an Juki an of Waurn 

 Ponds. The present form differs in the radiating arrangement 

 of the zooecia. 



OSTRACODA. 



Bairdia amygdaloides is still found living in Bass Strait, and 

 its distribution extends up to Port Jackson and into the South 

 Pacific, but it appears to be confined to the waters of the 

 southern hemisphere. The species is found in the fossil con- 

 dition in Janjukian (Miocene) strata a1 Batesford, and in the 

 Miocene and Lower Pliocene ol the Mailer bores. 



Cythcrc postdecli 1 1- of especial interest, sine it was only 

 ntly described from the Miocene, and probably Lower 

 Pliocene, beds of the Mallee bon 



* See Jones, Parker, and Brady, "Mon. Foram. Crag," [866 Appendices 

 I. and II. (footnotes), pi, 1., f 1 m ^ - 62, 63 ; pi. iv., ii^s. 11-14. 



I Mitthcil, " J.ihrl). d. k. mi Geo! tastalt," vol. iv., 1875. p. 05, pi. 

 w., figs. 4a. b ; Chapman, Journ. Linn. Soc, I. on. 1. Zool., vol. 



p. 32, pi. iv., fig. .Si. hi. Biol. Ri all li S Endeavour," vol. 

 iii., part I, 191 5, p. 10. 



