14 A MONOGRAPH OF 



Variety c. — Shell large, last whorl conspicuously keeled, reddish- 

 brown j the H. Tiiedianus — Cox. 



Diameter, greatest 0-41, least 0'35 ; height, 0-20 of an inch. 



Habitat. — Recherche Bay. 



Variety d. — Same as typical in size, colouration, and form ; but the 

 irregular rugose striation is much more prominent, and becomes at the 

 angular portion of the body-whorl very irregularly-distant lamellae. This 

 variety may be termed H. M^Coyi. 



Habitat. — Dandenong Range, Victoria, 



A somewhat variable species within certain limits, but not so much 

 so as would be imagined by the long synonomy. The specimens named 

 helice by Cox are immature shells, wanting the last whorl, and the 

 tabescens a trifle flatter than usual. Mr. Brazier remarks — " This species 

 approaches in miniature Helicarion sophice (Gashoin) from Lord Howe's 

 Island." Judging from the number of specimens that I have seen, it is 

 equally abundant at the extreme south of the island as H. Stanleyensis 

 is at Circular Head ; both species are found in company with H. ccesus. 

 On Mount "Wellington I have often got it among decaying leaves in 

 damp places, and occasionally under logs and stones. At Mount Bischoff 

 one specimen was got by. Mr. Johnston under a log. Heretofore it had 

 been looked upon as a strictly southern species, although I have long 

 known ol it existing in Victoria, The nearest described form from 

 Australia is H. radians (Pfi-.), said to have been got at Port Jackson, 

 New South Wales, but unknown to collectors there. The variety 

 Allporti was described by Dr. Cox as H. Petterdiy but Mr. Legrand sub- 

 stituted that name for H, Allp)orti, which I retain for that variety. 



17. — Helix ( ) tranquilla — Cox. 



Legrand's Col. for Mon., sp. 37, pi. ii., fig. 3. 



Shell deeply and narrowly umbilicated, depressly globose, thin, 

 transparent, pale greenish yellow brown, coarsely striated with lines of 

 growth ; spire raised, sub-conoid ; whorls o|, gradually increasing in 

 size, distended, last gently descending in front ; aperture diagonal, 

 ovately lunar ; peristome simple, not thickened, regular j margins ap- 

 proximating ; columellar margin dilated and reflected. 



Diameter, greatest 0-35, least 0-28 ; height, 0*24 of an inch. 

 Habitat. — Port Davey. 



Described from an unique specimen, which is probably but an ex- 

 treme example of the light coloured variety of H. Fordei. 



