1867. j mr. g. f. angas on australian mollusca. 209 



138. Triphoris labiatus. 



Triphoris labiatus, A. Ad. P. Z. S. 1851, p. 279. 

 Under stones, low water, Port Jackson. Length 3 lines. 



Fam. LiTTORiNiD^. 



139. LiTTORINA MAURITIANA. 



Phasianella mauritiana. Lam. Anim. sans Vert. ix. p. 244. 



Littorina unifasciata, Gray. 



? L. Icevis, Phil. 



Very abundant on rocks between tide-marks, and creeping up far 

 above high-water mark, all along the coast of New South Wales. 

 This species extends from New South Wales to Swan River. Length 

 10 lines. 



140. Tkctarius pyramidalis. 



Littorina pyramidalis, Quoy, Voy. de I'Astr. pi. 33. f. 12-15. 

 Equally common, and occurring in similar places, with L. mauri- 

 tiana. 



141. RlSELLA LUTEA. 



Trochus luteus, Quoy et Gaim. Voy. de I'Astr. p. 271, pi. 62. 

 f. 8-11. 



T. cicatrosus, Jonas, 1813, in Phil, Abbild. Trochus, pi. 2. f. 2. 



This species, the most conical of the genus, is common on the 

 rocks outside Port Jackson, and along the coast to Kiama and Jervis 

 Bay. Length 10 lines. 



142. RiSELLA PLANA. 



Trochus planus, Quoy et Gaim. Voy. de I'Astr. p. 274, pi. 62. 

 f. 13, 14. 



Very abundant on rocks between tide-marks. Found also in 

 South Australia. A depressed species, 5 lines in height, with the 

 diameter of the base 1 inch. 



143. RiSELLA NANA. 



Trochus nanus. Lam. Anim. sans Vert. Gen. Trochus, no. 67. 



Littorina australis. Gray, Beechey's Voy. Zool. p. 141. 



This species, which may be disthiguished by the black bands in 

 the interior of the aperture, is found occasionally in Port Jackson, 

 in company with R. plana. In Tasmania it is abundant. Height 

 5 lines, diameter of base 7 lines. 



144. *FoSSARINA PATULA. 



Fossarina patula, Adams & Angas, P. Z. S. 1863, p. 424, pi. 37. 

 f. 9, 10. 



Two specimens only of this interesting form were obtained, during 

 Proc. Zool. Soc— 1867, No. XIV. 



