Victorian Marine MoUusca. 155 



Genus Nacelia, Schumacher 1817. 



Nacella parva, Angas. 



1878. Nacella parva, Ang. P.Z.S., Lond., p. 862, pi. 54, 



f. 12. 

 1912. Nacella parva, Aug. Verco, T.R.S., S.A., v, 

 XXXVL, p. 183. 

 i/a&.— Portland. 



Ohs. — Found living on the seaweed Cymodocea antarctica, 

 associated with Nacella stowae, Verco, and Stenochiton cymo- 

 docealis, Ashby. A rather constant feature is : "A single row 

 of pale blue spots and crescent-shaped opaque markings extend- 

 ing from the apex centrally, more or less along the outer arc 

 of the shell." Size of type: Diam. maj. 6, min. 3, alt. 2mm. 



Genus Patelloida, Quoy and Gaim. 1834, replaces (Acmae 

 Eschschoitz, 1828, not of . Hartman 1821. 



Genus Callochiton, Gray 1847. 



Callochiton mayi, Torr. 



1912. Callochiton mayi, Torr. P.R.S., Tas., p. 1. 

 1912. Callochiton mayi, Torr. May and Torr, Id. p. 28, 



pi. 1, f. 5-7. 

 1912. Callochiton mayi, Torr. T.R.S., S.A., v. XXXVL, 

 p. 164, pi. 5, f. la-f. 

 //a^7.— Portland. 



Ohs. — Size of type: Length 15, breadth 8 mm. A beauti- 

 fully ornate little species. The girdle, with its dense microscopic 

 diamond-shaped scales, longitudinally-sulcate pleural areas, and 

 dots on the lateral areas, serve as useful recognition marks. 



Callochiton rufus, Ashby. 



1900. Callochiton rufus, Ashby. T.R.S., S.A., p. 87, pL 



1, f. 2a-g. 

 1921. Callochiton rufus, Ashby, these Proc, v. XXXIIL, 

 for 1920, p. 150. 

 Hah.— Voxt Phillip Heads (J. B. Wilson). 

 Ohs.^^ize. of type: Length 16, breadth 10 mm. Ashby loc, 

 cit. says this was misidentified by Sykes as C. platessa, Gould. 



