TASMANIAN LAND SHELLS. 



A Inglily polished and beautitul species, one of the finest and most 

 distinct of our numerous Helices, of such constant character that it is 

 scarcely possible for it to be mistaken for any other species, although 

 small specimens have much the appearance of the larger varieties of H. 

 ruga (Cox), Specimens from the vicinity of Launceston, where it is very 

 common, show greater flatness of spire than the generality of those 

 collected by me in Ringarooma and to the west ; a pale yellowish-green 

 variety is also more often to be met with. In habit it is a moist-loving 

 species, generally confined to the dense scrub, yet I have found many 

 specimens (rather small) on the dry slopes of the hills around Laun- 

 ceston, and Mr. R. M. Johnston has collected it on the dry exposed 

 slopes of Ben Lomond. Its lingual membrane is large, 14 mil. in length 

 by 3 in width, rounded at one end and pointed at the other, with about 

 75 rows of 37 "37 teeth, arranged in slightly-curved angular rows; each 

 tooth is slenderly acuminate, slightly curved toward the apex, and fur- 

 nished with a rounded projection on the middle of the posterior side. 



This shell seems to represent II. straiigei (Pfr.) of Australia, from 

 which it is nevertheless very distinct. It has not been observed in the 

 southern portion of the island. 



5. — Helix ( ) Sinclairi — Pfr. 



Zeit-schrift fiir Malac, 1854, p. 154. 



Reeve, Cone. Icon., sp. 1444. 



Cox, Mon., 1868, p. 32, pi. vii., fig. 3, 3a. 36. 



Legrand, Col. for Mon., sp. 12, ij1. i., fig. 0, pi. ii., fig. 14. 



H. homhycina — Pfr. 



Pro. Zool. Soc, 1854, p. 54. 

 Reeve, Cone. Icon., sp. 1314, 

 Cox, Mon., 1868, p. 20, pi. x, fig. 2. 

 Legrand, Col. for Mon., sp. 2. 



H. dubitans — Cox. 



Legrand, Col. for Mon., sp. 29, pi. ii., fig. 7. 

 //. vexanda — Cox. 



Legrand, Col. for Mon., sp. 43. 



Shell umbilicated, depressed, thin, translucent, occasionally shining, 

 very regularly and very closely rather prominently ribbed, horny yel- 

 lowish, with many interrupted spiral reddisli bands ; spire flattened ; 

 whorls 4, flatly convex, quickly increasing, last large, depressed, convex 

 externally, much deflected in front ; base smoother and more glossy ; 

 umbilicus widely funnel-shaped, nearly equalling half of the diameter ; 

 aperture diagonal, ovately-lunar ; peristome simple, thin, regular, mar- 

 gins approximating, columellar margin scarcely dilated or reflected. 



Variety a. — Dull, dark chestnut colour, the //. duhitans (Cox). 



£3> 



