482 
APPENDIX 
[B. 
This shell is somewhat like P.pulhis, Turbo Pullus of Montag'ue, 
but the whorls are more convex, and it is rather differently marked. 
39. ScALARiA Australis, Lam, Hist. vi. pt. 2. 228. 
40. Scalaria tenuis, (n. s.) 
Testa conica umbilicata tenuis pellucida albida unifasciata^ 
costis albis tenuihus creberrimis parum elevatis Imvibus, 
anfractibus contiguis. 
Shell conical, thin, pellucid, whitish-brown, with a narrow central 
spiral brown band ; whorls contig'uous, convex, smooth, with nu- 
merous close oblique slig’htly raised, thin, simple-edg-ed cross ribs ; 
axis umbilicated ; umbilicus narrow ; mouth small, ovate, orbicular ; 
axis three-eighths, diameter one -fourth of an inch. 
This shell is most like Scalaria principalis^ nob. Turbo prin~ 
cipalis of Pallas, Chemn. xi. t. 195, f. 1876, 1877. The shell 
before me is most probably a young specimen. 
41. Delphinula laciniata, Lam. Hist, vi. pt. 2. 230. 
Turbo Delphinus, Gmel. Syst. Nat. i. 3599. 
Icon. Lister. Conch, t. 608. f. 45. 
This shell was found at low water upon the Coral Reefs, in the 
entrance of Prince Regent's River, on the North-west Coast. 
42. Nerita atrata, Lam. Hist. vi. pt. 2. 191. 
Icon. Chemn. Conch, v. t. 190. f. 1954, 1955. 
43. Nerita textilis, GmeUn* Syst. Nat. 3683. 
Icon. Chemn. V. t. 190, f. 1944, 1945. 
44. Natica MAMiLLA, Lam. Hist. vi. pt. 2. 197. 
Nerita mamilla, Gmel. Syst. Nat. 8672. 
Icon. Lister Conch, t. 571. f. 22. Enc. Mcth. pi, 453. f. 5. 
a. b. 
45. Natica alba, n. 
Icon. Chemn, v. t. 189. f. 1922. 1923. 
