[Proc. Roy. Soc. Victoria, 29 (N.S.), Pt. I., 1916]. 



Art. VI. — Description of a Neiu Genus and two New Species 

 of Victorian Marine Mollusca. 



BY 



J. H. GATLIFF 



AND 



C. J. GABRIEL. 



(With Plate VII.). 

 [Read 13th July, 1916]. 



Larinopsis, nov. gen. 



Shell fragile, turbinate, umbilicate, whorls rapidly increasing in 

 size; peristome continuous, slightly reflexed. With an olivaceous 

 epidermis. Operculum horny, annular, with nucleus intramar- 

 ginal. The animal is viviparous and marine. 



Type of genus : Larina ? turbinata, Gatliff and Gabriel. i 

 The shell was provisionally described as a Larina, a genus erected 

 for the reception of a Moreton Bay (Queensland) form. L. strangei, 

 A. Adams. We asked the question iiespecting the specimen of the 

 northern type species, obtained in McKenzie River -r'^ Was it 

 obtained at a portion of the river beyond tidal influence?" Mr. 

 C. Hedley states^ that " The McKenzie flows not into the sea, but 

 into the Fitzroy more than a hundred miles from marine influence," 

 and further adds : " Though destructive criticism of this classifica- 

 tion is easy, constructive work of correctly placing the Victorian 

 shell is hard," and suggests the placing of it in the genus Pellili- 

 torina of Pfeffer, which in our opinion possesses quite different 

 characters. He also states: "Somewhat similar features; are 

 presented by the Antarctic genera Iveoconcha, Smith, and 

 Trichoncha, Smith." These similar features we fail to perceive, 

 and have therefore erected a new genus for our shell. ■ 



Marginella problematica, sp. nov. (PI. VII., Fig. 1). 



Shell minute, solid, pyriform, white, semi-transparent, spire 

 completely hidden. Aperture running almost the Avhole length of 



1 Gatliff and Gabriel. Proc. Roy. Soc. Victoria, vol. xxii. (n.s.), 1903, p. 35, pi. 13, figs. 1-6. 

 ■2 Hedley. Rec. Austr. Mus., vol. viii., 1912, p. 138. 



