BY C. HEDLEY. 21 



deposited in the ground under a log during October and November. 

 The radula and genitalia have been figured by Semper, who 

 incorrectly locates the species in the Sandwich Islands (Reis. im 

 Philip. Vol. in., p. 123, pi. xii., figs. 23, 24, 25, and pi. xvi., fig. 7). 

 The jaw I find to be boomerang-shaped, smooth, arcuate, ends 

 rounded, with no median projection. 



Bulimus tasmanicus, Pfeiffer. 



This species is arboreal in its habits, and confined to a narrow 

 belt of coast country. I was unable to visit its haunts and view 

 the creature alive. Mr. Petterd kindly presented me with some 

 alcohol specimens, from Maria Island, for dissection. He informs 

 me that the animal is greenish-grey in colour, with flat, thin, 

 pointed tail. This species, as might be inferred from the 

 resemblance of the shells, closely approaches B. mastersi, Cox, 

 (P.R.S.Q., Yol. vi., p. 250, pi. xiv.) in its dentition. The jaw is 

 thin, membranous, semitransparent, light horn-colour, crossed 

 obliquely on each side by about sixteen delicate folded ribs 

 denticulating both margins ; these ribs run obliquely towards the 

 median line of the jaw, and, meeting in the centre, form a median 

 triangular space. The radula is composed of 130 rows of 

 84-5-1-5-84; of these the rachidian presents a single, ovate, 

 lanceolate cusp, whose extremity reaches the margin of the basal 

 plate ; this is flanked by five laterals having the distal posterior 

 angle of the basal plate briefly alate and a small cusp developed 

 upon the outer base of the main cusp, whose stout ovate blade 

 just projects over the base of attachment ; seven rows from the 

 centre the marginal type appears, the main cusp becoming 

 bicuspidate ; on approaching the edge of the ribbon the teeth grow 

 smaller, and assume that slender, sinuous aspect so characteristic 

 of extreme marginals. The distinguishing features of the genitalia 

 are : — penis-sac long and slender, produced into an extremely long 

 flagellum, which is coiled up at the tip, and apparently without a 



