OF NEW SOUTH WALES. 101 



A simple horny shell, slightly shining, with a callus like tooth 

 divided, and turned back like a spout. 



6. — Helix (Discus) Lomonti. 



Shell umbilicated, very much depressed, lenticular, thin, pellu- 

 cid, light brown, rather obliquely striated, whorls 5|, flattened, 

 the last sharply keeled, suture with narrow margin, base slightly 

 convex, umbilicus large, wide open, aperture diagonal, compressly 

 ovate, peristome thin, acute, margins distant, columella thick- 

 ened. 



Diam. Maj. 6, min. 5|, alt. 1| lin. 



Ilab. Yule Island, New Guinea, found under decayed timber. 

 A thin, flat, depressed, pellucid, light brown species comes in 

 the section with Helix Merziana and Swainsoni, Pp. 



7. — Helix (Conulus) Maino. 



Shell minutely perforated, globosely conical, thin, shining, hya- 

 line, pale horny (under the lens), marked with fine oblique silky 

 strias, and minute spiral lines, whorls 5J, gradually increasing, 

 roundly convex, the last large and inflated, faintly keeled at the 

 periphery, base convexly rounded, with the striae more coarse than 

 above, aperture nearly vertical, ovate, peristome simple, thin, 

 acute, margins distant, columellar margin reflected covering one- 

 fourth of the minute umbilicus. 



Diam. Maj. 2, min. 1|, alt. 2 lin. 



Hah. Yule Island, New Guinea, found on trees. 



The sculpture of this pretty little species comes out beautifully 

 when placed under the microscope, the striae being as fine as silk. 

 Seventeen specimens only found on trees in the thick jungle. 



8. — Helix (Conulus) Reedei. 

 Shell minutely perforated, globosely conical, thin, shining, light 

 brown (under the lens), marked with fine oblique silky striae, and 

 minute spiral lines, whorls 5, roundly convex, the last large, cre- 

 nulated at the suture, sj)ire conoid, apex obtuse, obsoletely keeled 

 at the periphery, base convex, pale yellowish horn, marked with 

 spiral striae, aperture diagonal, roundly lunate, peristome simple, 



