1864.] DR. J.C. COX ON NEW AUSTRALIAN LAND SHELLS. 595 
Var. 3. Rufo-castanea, sine fasciis. 
Diam. maj. 0°65, min. 0°57, alt. 0°30 une. 
Hab. Clarence River, under bark of stumps on stony forest-ridges , 
apparently rare (Macgillivray). 
Animal bluish grey, with darker interstices; tentacles reddish 
brown. 
2. HeLix ASSIMILANS. 
H. testa aperte et perspective umbilicata, depresso-globosa, tenui, 
nitidissima, pellucida, supra (et intus umbilicum) oblique cre- 
berrime costulata et epidermide rufo-flavescente induta, infra 
levi, pallide viridi-cornea; spira angusta, convexa; anfracti- 
bus quatuor et dimidio, convexiusculis, ultimo rotundato, ad os 
leviter, plano antice vix descendente; apertura obliqua, fere 
rotundata ; peristomate simplici, superne et antice recto; mar- 
gine columellari subreflexo. 
Diam. maj. 0°75, min. 0°60, alt. 0°40 une. 
fTab. Clarence River, under logs in forest-land (Macgillivray). 
Very closely allied to H. strangei, from which, however, it may 
readily be distinguished by being smaller, less brightly coloured, and 
much more prominently ribbed, with fewer strize, also by the absence 
of the numerous faint decussating lines of the upper surface of its 
near ally, which, moreover, is confined strictly to the brushes, where 
H. assimilans is never found. 
3. Hewix witcoxt. 
H. testa minute umbilicata, globoso-conica, tenuissima, nitida, 
hyalina, fulvo-cornea, sub lente obsolete radiato-striata ; spira 
conica, acutiuscula; anfractibus sex, convexiusculis, ultimo ro- 
tundato ceteros altitudine equante; apertura paulo obliqua, 
lunari; peristomate recto, simplici, tenui ; margine eolumellari 
basi breviter expanso, reflexo, umbilicum semitegente. 
Diam. maj. 0°18, min. 0°16, alt. 0°20 unc. 
Hab. Clarence River, on leaves of trees in the brushes (Mae- 
gillivray). 
Animal (as seen through the shell) yellowish green ; exposed part 
of body pale bluish white ; upper tentacles and a line behind each 
dusky bluish. 
4. HeLix CLARENCENSIS. 
H. testa modice umbilicata, lenticulari, depressa, carinata, tenuis- 
sima, pallide succineo-cornea, superne sub epidermide irregula- 
riter radiatim curvato-striata, nitente, inferne convexa, levis- 
sima, nitidissima, vitrea; spira late conoideu, convexiuscula ; 
anfractibus quinque et dimidio, planatis, ultimo obtuse carinato ; 
apertura obliqua ; margine externo angulato, inferiore arcuato, 
columellari basi breviter expanso umbilicum leviter obtegente. 
Diam. maj. 0°48, min. 0°42, alt. 0°28 unc. 
Haé. Clarence River, on the ground, also on leaves of plants and 
trunks of trees in the brushes (Macgillivray). 
