314 



MR. G. E. DOBSON ON BATS 



[Mar. 5, 



columella with three stout plaits, which are carried round the base 

 of the last whorl. 



Alt. 5, diam. 2 lines. 



Hab. South Australia. 



Siphonaria albida, n. sp. (Plate XVIII. figs. 14, 15.) 



Shell elongately ovate, subsymmetrical, sharply conical, rather thin, 

 white ; ribs very numerous, rounded, unequal, crossed more or less 

 with squamose ridges ; apex subcentral, prominent, smooth, recurved ; 

 siphuncle inconspicuous ; interior white, shining, almost pearly. 



Long. 8, lat. 6, alt. 3^ lines. 



Hab. St. Vincent's Gulf, South Australia. 



A pure-white conical species, with the ribs very numerous and 

 crossed with irregular squamose ridges. 



Leda (Adrana) newcombi, n. sp. (Plate XVIII. figs. 16, 17.) 



Shell equivalve, very inequilateral, flattened, lanceolate, the poste- 

 rior side obtusely angled, the anterior terminating in a point slightly 

 curved upwards, thin, shining, white, sculptured with very fine, re- 

 gular, close-set concentric striae, which on the posterior side extend 

 nearly to the margin of the valves, whilst anteriorly they cease 

 abruptly, leaving about one third of the surface smooth, faintly 

 marked with the lines of growth only ; front dorsal margin very 

 slightly concave, two thirds the length of the shell ; ventral margin 

 somewhat arcuate behind, flattened below, and again slightly arcuate 

 towards the anterior extremity ; beaks very small, approximate, in- 

 curved. 



Length 1 inch 4 lines, alt. 4 lines, lat. 2\ lines. 



Hab. Dredged in Navy Bay, Aspinwall, in 8 fathoms {Dr. W. 

 Newcomb'). 



I have much pleasure in dedicating this new species of Adrana to 

 my old friend and correspondent Dr. W. Newcomb, of Ithaca, a 

 distinguished American conchologist. 



EXPLANATION OF PLATE XVIII. 



Fig. 1. Bulimics watersii, p. 311. 

 2, 3. - — — quadrifasciatus, p. 312. 



4, 5. ■ napo, p. 31 2. 



6, 7. eros, p. 312. 



8, 9. Rostellaria htteostoma, p. 313. 



Fig. 10, 11. Mttra lincolnemis, p. 313. 



12, 13. schomburgki, p. 313. 



14, 15. Siphonaria albida, p. 314. 

 16, 17. Leda newcombi, p. 314. 



6. Additional Notes on the Chiroptera of Duke-of-York 

 Island and the adjacent Parts of New Ireland and New 

 Britain 1 . By G. E. Dobson, M.A., M.B., F.L.S., &c. 



[Eeceived Feb. 18, 1878.] 



The following notes are derived from an examination of a second 

 collection of Chiroptera, consisting of forty-five specimens, recently 

 1 See P. Z. S. 1877, p. 114. 



