NTJCrLANA. 351 



Shell large, solid, binge-line angulate, carrying a large number 

 of V-sbaped teetb ; ligament pit directly under the umbo, very 

 deep ; lunule large, striated ; surface closely regularly lineate ; 

 keel from the umbo to the rostrum prominent, curved ; ventral 

 margin arcuate. 



Dimemions. — Height 22 mm. ; length 35 mm. 



Form, and Loc. — Post-Pliocene : Limestone Creek, Glenelg river, 

 Yictoria. 



L. 6574. Examples of both valves of the adult. Purchased. 



Nuculana huttoni, Tenison- Woods (sp.). 



1879. Leda hutloiii, Tenison-'Woods, Proc. Linn. Soc. N.S.W. vol. iii. 



p. 239, pi. xxi. fig. 2. 

 1886. Leda huttoni, Tate, Trans. Eoy. Soc. Soutk Aust. vol. viii. p. 130, 



pi. vi. fig. 4. 

 1893. Leda huttoni, Tate and Dennant, id. vol. xto. pt. 1, p. 224. 



Much more elongate than any other species of Nuculana here 

 described. The umbones are placed well forward ; anterior side 

 rounded ; posterior elongate, truncate, and biangulate ; surface 

 concentrically in-egularly striated and sulcate, and having micro- 

 scopic radiating striations. 



Dimensions. — Height 4*5 mm. ; length 11 '5 mm. 



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



L. 9822. Many examples of both valves, illustrating stages 

 of growth. Purchased. 



Nuculana praelonga, Tate (sp.). 



1886. Leda prcelonga, Tate, Trans. Roy. Soc. South Aust. vol. viii. p. 133, 

 pi. xii. figs. ■ia-b. 



This shell is very small, transversely ovate, the posterior side 

 being the shorter — features which render it easily recognizable 

 amongst its congeners. It is compressed, smooth, the umbones 

 are inconspicuous ; whilst it has a well-deiined pallial sinus. 



Dimensions. — Height 3 mm. ; length 4 mm. 



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



L. 9857. Several specimens of both valves. Purchased. 



