EXPLANATION OF PLATE XXIX. 



Fipf. 1. Two ranks of eleven teeth from the centre, and of the thirtieth 



to the thirty-fourth from the margin, of the radula of H. gulosa, 



Gould : much magnified. 

 ,, 2. Jaw of same : magnified. 

 „ 3. Sculpture of the shell of the same, drawn from below the suture 



of the last whorl behind the aperture : magnified. 

 „ 4. Genital system of the same. 

 „ 5. Animal of the same, left side, mantle-collar reflected and exposing 



rudimentary lobes : enlarged one and a-half diameters. 

 ,, G. Animal of the same, right side, showing mode of progression and 



the mantle lobes surrounding the pulmonary orifice : enlarged 



one and a-half diameters. 



(Reproduced from drawings by C. Hedley.) 



