129 



than are the actual specimens, and the costate character of the 

 whorls is not very well brought out. 



Dimensions. — Length 6 mm.; breadth 2'75mm. ; length of 

 aperture 3 mm. 



Form, and Loc. — Eocene : Muddy Creek, Victoria. 



G. 9365. Pour specimens. Purchased. 



Genus CONOMITRA, Conrad. 

 [Amer. Journ. Conch, vol. i. 1865, p. 25.] 



Shell biconical, smooth, finely longitudinally plicate, or net- 

 like ; aperture narrow ; outer margin erect, sharp, bent round 

 in the neighbourhood of the rather broad anterior canal ; columella 

 with four or five plaits. 



T!/j)e. — Mitra fusoides, Lea. 



Conomitra othone, Tenison-Woods (sp.). 



1S80. Mitra othone, Tenison-Woods, Proc. Linn. Soc. N.S.W. vol. iv. 



p. 8, pi. ii. fig. 4. 

 1889. Mitra {Cancilla) othone, Tate, Trans. Eoy. Soc. South. Aust. vol. xi. 



pp. 135, 139, pi. iv. fig. 10. 

 1893. Mitra othone, Tate and Dennant, id. vol. xvii. pt. 1, p. 220. 



Shell biconical ; protoconch composed of two and a half to 

 three smooth turns ; aperture more than half the length of the 

 shell, elongate, acute posteriorly, and truncate anteriorly; columella 

 somewhat twisted in front, carrying four well-developed plaits, 

 the smallest being the most anterior. The whorls are almost 

 flat, ornamented with more or less granulose, closely-set, spiral 

 threads, crossed by growth-lines ; suture bordered by a slightly 

 raised ridge or thread. 



Conomitra othone has been compared with Mitra atractoides, 

 but the biconical form and less obtuse protoconch of the former 

 are very distinctive. 



Dimensions. — Length 9"5 mm. ; breadth 5 mm. ; length of 

 aperture 5-5 mm. 



Form, and Loc. — Eocene: Muddy Creek, Victoria. 



G. 9366. Two specimens. Purchased. 



