105 



141. Mttilus Menkeaxus, Philippi. 



Throughout the South Australian coast line, on rocks be- 

 tween tide marks; also King George Sound ! 



Variable in shape, usually strongly curvated, with uncinate 

 beaks, but sometimes elongated with nearly straight sides, 

 ornamented with a variable number of radial undulating thick 

 granulose ribs ; colour, brown outside, purplish within. 

 Length, about one and a-half inches. It is separable from 

 31. Magellanic us, Lamarck. 



(b) Surface smooth. 



142. Mttiujs atee, Erauenfeld, Moll. Novara Exped., t. 2, 

 f . 29, 30 ; 31. crassus, Tenison AVoods, P. E. S. Tasmania for 

 1876, p. 157. 



Eocky shores between tide marks, St. Vincent G-ulf ; also 

 Tasmania (T. Woods) and New Zealand ! (Novara Exped., 

 Sutton, &c). 



Oblong, black, with very tumid umbones. Length, about one 

 inch. 



143. Mttilus chorus, Molina ; 31. latus, Lamarck, An. s. 

 Vert., vi., p. 122 (non. Chemnitz). 



On the keel of the hulk Fitzjames moored in Largs Bay 

 (Port Adelaide 3Ius.l). Probably introduced to this locality 

 from Port Phillip !, where the species is common, and where 

 also the hulk was a derelict for several years ; Quichen Bay 

 (_S. H. Pulleine .'); also Tasmania, New Zealand, and Chili. 



Oblong-oval, dilated and compressed behind, covered with a 

 dark olive-brown shining epidermis, with a few scattered long 

 hairs set in a white calcareous disc, interior bluish- white ; 

 attaining to four inches long. 



144. Modiola australis, Gray in King's Coasts of Australia, 

 ii., p. 477, 1827 ; id. Eeeve, Mon., t. 5, f. 21. 31. tulipa, var., 

 Lamarck, An. s. Vert., vi., p. Ill, 1S19. 31. areolata, Gould, 

 U. S. Ex. Ep. xii., p. 452, f. 562. 



Beyond low tide throughout South Australian waters. Also 

 Tasmania, New South Wales, and New Zealand. New Holland 

 (Lamarck) . 



Ovately oblong, anterior side very short, posteriorly broadly 

 dilated, convex in the middle ; yellow chesnut ; adult shells 

 bearded towards the margin ; length to three inches. 



145. Modiola albicosta, Lamarck, An. s. Vert., vi., p. 111. 

 Port Elliot (W. T. Bednalll). Also Tasmania (T Woods), 



Timor, Iudian Ocean, and New Holland (Lamarck). 



Smooth, shiniug, dark chesnut with darker rays ; attaining 

 to two and a half inches. 



