8 Frederick Chapman : 



angle. Ventral flexure or sinus well-marked, thus distinguishing it 

 from M. adelaidensis, Tate, to which it bears some resemblance. The 

 posteror margin is widely rounded, and meets the ventral margin at 

 an obtuse angle. Surface finely wrinkled with growth striae. 



Dimensions. — ^Height (circ), 35 mm.; width (circ), 29 mm.; 

 depth of valve, 12 mm. 



Observations. — This specimen from the Moorabool Valley was at 

 first thought to be "a mere variety of M. puehlensis, Pritchard,i3 but 

 finding other examples in the Dennant collection from Brown's Creek, 

 Otway, showing the same strong umbonal angulation, there is no 

 doubt that it is distinct. M. adelaidensis, Tate,i4 also resembles this 

 form in some particulars, but differs in having no conspicuous sinus 

 on the ventral border. All the species here mentioned are confined 

 to the Janjukian (Miocene). 



Occurrence. — Type; in hard, yellow limestone, from the Moorabool 

 River, near Maude. Geod. Surv. coll., W.T.M.4. Other specimens occur 

 at Brown's Creek, Cape Otway (Dennant coll.). 



Order TELEODESMACEA (Diogenodonta). 



Fam. LUCINIDAE. 



Geuus Lucina. Hruguiere. 

 Subgenus Codakia, Scopoli. 



Lucina (Codakia) planatella, Tate. 



Lucina planatella, Tate, 1886, Trans. R.S., South Australia, 

 vol. viii., pi. xii., fig. 11 (fig. only). Iden., 1887, ibid., 

 vol. ix., p. 146 (description). 

 Observations. — This species has hitherto been recorded only from 

 Table Cape. Its occurrence in the hard, yellow limestone of the 

 Moorabool Valley at Maude is additional evidence in favour of the 

 correlation of these two beds. The shell is preserved in places, show- 

 ing the typical ornament. 



Dimensions of the present specimen. — Height, 50 mm.; width 

 (circ), 48 mm. The Table Cape specimen is much smaller, measuring 

 33 mm. by 31 mm. 



Occurrence. — Moorabool River at Maude (Geol. Surv. Vict. coll. 

 W.T.M.4). 



Age. — Janjukian (Miocene). 



Fam. DIPLODONTIDAE. 



Genus Diplodonta, Hionn. 



Diplodonta harrisi, sp. ncv. (Plate II., Fig. 12.) 



Description.— Shell moderately large, subquadrate, tumid, with well- 

 Tounded beaks, and a well-marked umbonal ridge. Anterior margin 



13. Proc. R. Soc Vict, vol. xiv., pt. i., 1901, p. 26, pi. lii.. fig. 1. 



14. Trans. R.S. South Australia, vol. viii.. 1886, p. 123, pi. xi., fig. 3. 



