16 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 72 



THERSITES (HADRA) DARWINI Brazier 



1871. Helix (Hadra) darwmi Bbaziee, Proc. Zool. Soc, p. 639. 



Having no specimens and no illustrations to which to refer, the 

 best that can be done for this species is to reproduce Brazier's origi- 

 nal description and remarks. 



Shell umbilicated, depressedly globose, very thin, finely granulated and 

 radiately striated ; spire moderately elevated, obtuse ; whorls 5, slowly increas- 

 ing, convex, last roundly convex, slightly descending in front, dirty yellow; 

 base convex, sculptured the same as the upper surface; umbilicus rather 

 small, deep ; aperture diagonal, ovately lunate ; peristome very little reflected, 

 white; margins approximating and joined by a thin callus, columellar mar- 

 gin reflected and half covering the umbilicus. 



Diam. maj. 7, min. 5^^, alt. 4 lines. 



Habitat: North coast of Australia (coll. Brazier). I received two specimens 

 of this species from a friend who collected them in the far north of Australia, 

 but the precise locality was not sent with them. It is allied to Helix forsteri- 

 ana Pfr., from Northeast Australia. 



EXPLANATION OF PLATES 



(All figures natural size) 



Plate 1 



Fig. 1. Thersites (Hadra) hartschi mobiagensis, new subspecies. 



2. Thersites {Hadra) lizardensis suma, new subspecies. 



3. Thersites {Hadra) hipartita Mpartita Ferussac. 



4. Thersites {Hadra) hartschi yamensis, new subspecies. 



5. Thersites {Hadra) iartschi mtirraijensis, new subspecies. 



Plate 2 



Fig. 1. Thersites (Hadra) bart seM iartschi, new subspecies. 



2. Thersites (Hadra) dartsohi diva, new subspecies. 



3. Thersites (Hadra) waltoni, new species. 



4. Thersites (Hadra) Usardensis rada, new subspecies. 



5. Thersites (Hadra) semicastanea semicastanea Pfeiffer. 



6. Thersites (Hadra) forsteriana forsteriana Pfeift'er. 



7. Thersites (Hadra) lizardensis lisardensis, new subspecies. 



8. Thersites (Hadra) dalli, new species. 



Plate 3 



Fig. 1. Thersites (Hadra) hartschi cepa,, new subspecies. 



2. Thersites (Hadra) hartschi oma, new subsi>ecies. 



3. Thersites (Hadra) hartschi elfa, new subspecies. 



4. Thersites (Hadra) forsteriana ada, new subspecies. 



5. Thersites (Hadra) hartschi nesia, new subspecies. 



6. Thersites (Hadra) forsteriana major Pfeiffer. 



7. Thersites (Hadra) hartschi nura, new subspecies. 



8. Thersites (Hadra) semicastanea alma, new subspecies. 



9. Thersites (Hadra) hartschi fama, new subspecies. 

 10. Thersites (Hadra) hartschi paulensis, new subspecies. 



o 



