89 



Fossil Yellow Limestone (travertin), Geilston Bay, Hobart 

 Town. This, with the exception of the living species, H. 

 Launcestonensis, is the largest known Helix in Tasmania. 

 In certain characteristics, especipJly in sculpture, it approaches 

 more closely to the group of shells represented by jH". 

 Stephensi than to any other species now existing in Tasmania. 

 Helix Huxleyana, n.s. 



Shell very minute, sub-discoid, widely umbilicated ; whorls 

 4|, regularly increasing, flatly convex above and below ; no 

 trace of sculpture ; suture impressed ; spire slightly elevated ; 

 umbilicus open, shallow, one-third the diameter ; aperture 

 Innately oval, margin simple. Greatest dia., 2| mil. ; least, 

 2J mil. ; height, 1 mil. 



Fossil, Yellow Limestone (travertin), Geilston Bay, Hobart 

 Town. This shell was described from the cast of a solitary 

 specimen, kindly sent to me by Mr. Eoblin, from the Museum 

 collection. 

 Helix Geilstonensis, n.s. 



Shell orbicularly depressed, narrowly deeply perforate, 

 smooth (?) ; whoris, 3| to 3|, rapidly increasing, flatly con- 

 vex above, markedly convex below ; spire flatly convex ; 

 suture impressed ; base sharply, suddenly excavate around 

 the deep, narrowly-crateriform umbilicus; aperture large, 

 sub-quadrately lunate ; columellar margin, somewhat obliquely 

 produced and reflexed ; margins approximating, simple, 

 slightly expanded above and below. Greatest dia., 22 mil. ; 

 least, 18 mil. ; height, 13 mil. 



From Yellow Limestone, Geilston Quarry, near Hobart 

 Town. The species is described from a well-preserved cast. 

 No trace of sculpture could be detected on the specimen 

 examined by me, although it is probable the whorls may have 

 been ornamented by traasverse striae like most of the existing 

 species in Tasmania. 

 Helix Sinclairi, Yar. 



Shell depressed, discoid, umbilicate ; spire flattened ; 

 whorls 4, rapidly increasing, flatly convex above, convex 

 below, ornamented by somewhat coarse regular obliquely- 

 arcuate striae ;* umbilicus narrow, almost perforate, scarcely 

 one-fourth the diameter ; aperture obliquely lunate ovate ; 

 columellar margin, approximate, slightly reflexed below, 

 scarcely expanded above ; lip simple, thin. Greatest dia., 13 

 mil. ; least, 10 mil. ; height, 7 mil. ; dia. of umbilicus, 3 mil. 

 Fossil, Yellow Limestone (travertin), Hobart Town. The 

 above species is without doubt identical with the living 

 species, so far as external characters go. Of course such 



*The ornamentation was observed by me in a specimen sent to England. 

 The cast only is preserved in the specimen sent to me by Mr. Legrand. 



