Catalogue of Victorian Mollusca. 385 



Obs. — Watson describes his species as being dredged in about 

 seven fathoms, off Cape York, North Australia. Our shell is 

 rather larger and more elongate, but we do not consider the 

 slight difference has specific value. 



BuLLiNELLA TENUIS, Hedley. 



1905. Cylichna tenuis, Hedley. Rec. Aust. Mus., vol. 

 vi., p. 54, f. 22. 

 Hab. — In shell sand, Ocean Beach. Point Nepean. 

 Obs. — This species was kindly identified for us by its author. 

 The size of type is: Length 2.45, breadth 1.05 mm. 



Genus Akera, Muller, 177'). 



Akera tasmanica, Beddome. 



(See this volume, PI. XXL, Figs. G, 7). 



1883. Akera tasmanica, Beddome. P.R.S. Tas., p. 169. 

 1901. Hydatina tasmanica, Hedley. P.L.S. N.S.W., vol. 



XXV., p. 725, f. 22. 

 1901. Akera tasmanica, Tate and May. Id., vol. xxvi., 

 pp. 417, 460. 

 Hab. — Shoreham, Western Port; Portsea, Port Phillip. 

 Obs. — A full description is given in the last reference quoted 

 above, as follows : — " Shell globosely-oblong, imperforate, thin, 

 hyaline. Colour, brown, darker-tinted posteriorly, with a nar- 

 row white band near the shoulder, and a wider one in the 

 anterior-third. Last whorl inflated, equalling the total length of 

 the shell, rounded at the shoulder ; spire truncated, flush with 

 the posterior margin of the last whorl, separated by a channelled 

 suture, terminated by a hyaline bulbous nucleus. Aperture 

 contracted above, enlarging anteriorly to the arched front; 

 outer lip truncatedly angled posteriorly : coliunella arched, 

 simple. Length 1.9, width 1.2 mm." 



Some of our examples are of u uniform l)rown, upon others a 

 median band is discernible of a lighter colour, otherwise they 

 exactly tally with the description. Mr. May, from specimens 

 sent to him, confirms our identification. Mr. Hedley's figure, 

 quoted above, does not depict our shell, so we are now figuring 

 it. 



