A MONOGRA.PH OP 



Variety h. — Yellow-brown colour above, chestnut below, the H, 

 veocanda (Cox J. 



Variety c. — Bright gi-eenish yellow throughout. 



Variety d. — Dark gi-eenish aspect, and rounder whorls ; striated as 

 typical. Habitat — Macquarie Harbour. 



Diameter, greatest 0-70, least 0*60 ; height, 0*25 of an inch. 



Habitat. — Mount Wellington, Huon River, Recherche Bay, Port 

 Davey, Macquarie Harbour, Black River, Rocky Cape, 

 River Leven, George's Bay, Chudleigh, Middlesex Plains. 



A very variable species, as far as colour and the dispersion of 

 the markings, occasionally very dark with a bronzed lustre, and often 

 met with of a general bright yellow, brown, or even greenish colour, 

 with little and sometimes no markings perceptible. Specimens from 

 Macquarie Harbor have a gi-eenish aspect, and show greater roundness 

 of body whorl, and little, if any, deflection in front, are darker in 

 appearance than those from the south and north and more shining below. 

 It is a moist-loving species, only to be obtained in dense places among 

 decaying leaves that so thickly cover the ground in such places, and 

 imder the decaying logs, and sometimes nestling under stones. At one 

 time it was considered peculiar to the southern portion of the island, but 

 more extended research has shown that it has a much wider distribution, 

 although it cannot be said to be generally dispersed, for up to the present 

 time it has not been obtained in the dense scrubs of the north-east. 

 There it seems to be replaced by H. Launcestonensis ; nevertheless it may 

 yet be discovered in that, to all appearance, congenial locality. Legrand, 

 with truth, remarks — " There is no doubt that the two species," referring 

 to^. Sinclairi and H. bombycina, "are identical, as they run so gi-a dually 

 into each other that it is impossible to say where Sinclairi ends and 

 bombycina begins." On Mount Wellington it may be often met with 

 at an altitude of over 3000 feet, but more abundantly in the dense 

 gullies that converge from that mountain. It may be easily recognised 

 from H. ruga, its nearest ally, by its striated base, larger size, colouration 

 and deflection of the upper portion of the aperture ; in the latter respect 

 it resembles If. Launcestonensis, although very diflerent in all other res- 

 pects. Lingual teeth large, aculiate, curved, with an indistinct lump in 

 the middle on the posterior side, arranged in angular rows as in H. 

 lampra and H. ruga. The lingiial membrane in all these species is 

 large and comj)aratively wide, and greatly resembles that of Testacella 

 Jialiotoides, as figured in Woodward's " Manual of the Mollusca," page 

 298. 



The sj)ecimens described by Dr. Cox, under the names of dubitans 

 and vexanda, are but varieties of colouration, and have no constant 

 specific character of reliable nature. 



