CYLINDROBULLA. 379 



A. BICINCTA Quoy & Gairaard. PI. 42, figs. 15, 13. 



Shell ovate-oblong, very thin, fragile ; white, encircled by twa 

 reddish bands ; surface with longitudinal and transverse stride ; 

 suture fissured. This Bulla has almost entirely the form of the 

 fragile Bulla [J.. bullata], only the right margin is more developed 

 and the aperture wider below. Alt. 1 inch, diam. 8 lines. (Q. & 



<?.). 



Harbor of the Princess Royal, King George's Sound (Q. & G.). 



B. bicincta Q. &. G., Zool. Astrol., ii, p. 355, pi. 26, f. 31, 32. 

 A. AD., Thes. p. 573, pi. 121, f. 44. SOWB., C. Icon., f. 5. 



A. TUMIDA A. Adams. PI. 42, fig. 14. 



Shell horny, fragile, ovately cylindrical, spire rather flattened, 

 semipellucid, tumid in the middle, and rather gibbous near the in- 

 ner lip, encircled with a faint, scarcely conspicuous fuscous band, 

 transversely very finely striated, longitudinally somewhat plicated ; 

 aperture anteriorly very much dilated. (Ad."). 



New Zealand (Adams). 



B. (Alcera) tumida A. AD., Thes. p. 573, pi. 125, f. 169. A. 

 tumida SOWB., Conch. Icon., f. 2. 



The locality requires confirmation. Is it identical with A. bi- 

 cincta f 



A. TASMANICA Beddome. Unfigured. 



Shell minute, thin, ovate, cylindrical, ventricose; whorls distinct, 

 channelled at sutures, brown, with two white bands on body-whorl ; 

 aperture elongate, pyriform, rounded in front; columella excavated. 

 Long. 2 mill., lat. 1 mill. (5.). 



Off Old Station, Brown's Elver Road, 1 fms., and Bruny Island, 

 Tasmania. 



Akera tasmanica BEDDOME, Papers and Proc. Roy. Soc. Tasm., 

 1882, p. 169, 1883. 



Genus CYLINDROBULLA Fischer, 1856. 



Cylindrobulla FISCH., Journ. de Conch., 1856, p. 275, type (7. 

 beaui. 



Shell thin and fragile, cylindrical, with sunken spire; aperture as 

 long as the shell, linear except at base, produced at the vertex in a 

 deep slit following the suture as in Akera; base obliquely truncated, 



