BY W. L. MAY. 55 



PHILIPPIELLA RUBRA (Hedley).— Many localities 

 hi the south. 



MYTILUS CANALICULUS (Martyn), Universal Con- 

 chologist, 1784, PI. 78. Latus (Chem), non 

 Lamarck. Tasmanicus, Tenison-Woods. This 

 novel synonymy is the result of a careful exami- 

 nation of our larger Mytilus, showing that the 

 very large form named Tasmanicus, by Woods, 

 is not conspecific with M. planulatus (Lamarck), 

 but is identical with the New Zealand species 

 M. canaliculus, which is distinguished — besides 

 some difference in outline — by strong teeth in the 

 hinge at the apex of the shell, and which are 

 quite wanting in M. planulatus. The habitat is 

 peculiar, it being nearly always found in deep water, 

 and is occasionally obtained by scallop dredgers in 

 the Derwent. I once saw two specimens attached 

 to a tidal rock, Fred. Henry Bay, and also possess 

 a fine example taken on the beach at Marion Bay, 

 East Coast. 



AURICULA DYERIANA (Tenison-Woods).— I now 

 possess one of the type lot of the above species. 

 In Tate and May it is made a synonym of Cassidula 

 zonata (H. and A. Adams), but from a study of C. 

 Hedlev's figure of that species, in P. L. Soc, New 

 South' Wales, 1905, p. 537, PL XXXIIL, Fig. 30, 

 and also from Port Jackson specimens I now have, 

 I find they are quite distinct. I also find that 

 A. dyeriana is an absolute synonym of Cassidula 

 nucleus (Mart). As this is a tropical species, it is 

 very unlikely to occur here, and Mr. Dyer told me 

 that after taking the type lot he could never find it 

 again, although he searched very carefully. I 

 therefore consider it to have been an accidental in- 

 troduction, and that the name should be expunged 

 from our list. — Sandford, July, 1908. 



In the Records of Australian Museum, Vol. IV., No. 

 7, 25th August, 1902, H. L. Kesteven erected a new 

 genus, Risellopsis, for Hutton's Fossarina varia. I now 

 describe a second species, which is quite distinct from 

 Hutton's, whilst still fulfilling the conditions necessary 

 to place it in the genus. 



