BY C. HEDLEY. 



167 



Macdonald has handed down to us, shows the Aneiteum mollusk to 

 he " of a pale yellowish-brown colour . . . mottled 

 with reddish brown or black pigment over the dorsal region. '* This 

 clearly shows that it is specifically distinct from our Brisbane species. 



A synopsis of the family might be ananged as follows : — 



Order Elasmognatha. — - 



Jaw with superior quadrangular accessory plate. 



Family Janellidce, Gray, 1853. — 



Shell, internal, consisting of several irregular calcareous 

 fragments imbedded in the mantle. Animal naked, lim- 

 aciform, bilentaculate. Back with a median longitudinal 

 groove, whence branch secondary oblique grooves. Radula 

 with involuted margins, teeth with irregular multifid 

 cusps. Genital o gans situated anteriorly. 

 Genus Athoracophorus, Gould, 1852. 



Synonyms : Janella. Gray, 1850; Konophera, Hutton, 1878. 

 Animal not exceeding an inch and a half in length, with 

 small mantle, anterior to which is (?) a small mucous- 

 pore. 



A. bitentaculatus, Quoy and Gaimard, 1P32. Synonym anti- 

 podarum, Gray. 1853. 



Body smooth, rapidly tapering, back dirty yellow with pale 

 brown spots; rachidian teeth with central cusp?. 



A. papillatus, Hutton, 1878. 



With small papilla 1 on the back between the oblique grooves,, 

 differing little from bitentaculatu-. 



A. marmoreus, Hutton, 1878. 



Body slowly tapering behind, tail rounded. Colour blackish 

 with pale brown on back. Eye peduncles short and conical. 

 Rachidian teeth emarginate anteriorly, without central cusp. 

 .. virgatus, Smith, 1884. 



Colour buff, with five irregular blackish stripes down the 

 back ; respiratory orifice about midway between the centre 

 of the dorsal area and the margin of tlie foot. 



