1881.] Mollnsca of the Indo-MaJayan Fauna. 120 



Deshayes, and is consequently mentioned as the most ancient species as yet 

 discovered of the Cychstomacca, in his magnificent work, insufficiently 

 studied by Conchologists, on the Land und Siisswasser Conchylien der 

 Vorwelt, 1870-5. 



Helicarion [Austenia] magnificus, G. -Austen and Nevill, PL V, Fig. 23. 



Nevill, J. A. S. B., 1877, Momein [Yunnan], p. 24, diam. 46, axis 11£ mil., as 

 Helicarion magnificus, "coll. J. Anderson"; Nevill, Handlist 1, 1878, p. 16, as Heli- 

 carion [Austenia] magnificus ; Godwin- Austen, P. Zool. S. 1880, as Girasia magnified. 



I am quite unable to agree with Colonel Godwin-Austen, in referring 

 this species to Girasia ; if I were persuaded that it was the case, I should 

 not hesitate in uniting Girasia and Austenia. However, I consider both 

 well characterized, if not as distinct genera, at least as well marked sections 

 of Helicarion, not only as regards their shells but also on account of the 

 differences in the animals themselves. Austenia has a less " helicoid" and 

 more " slug-like" shell than true Helicarion, but is still always distinctly 

 convoluted and of firm though fragile texture. Pfeiffer and the old school 

 would have called them Vitrina. Girasia has merely a membranaceous 

 shell scarcely if at all convoluted, more or less rudimentary ; old authors 

 considered them as " slugs" and not as Helicidae at all. 



Helicarion" [Austenia] resplendens, Nevill, PI. V, Fig. 24. 

 J. A. S. B., 1877, Sawady and Bhamo, coll. J. Anderson, M. D. 



Gibbus lyonetianus, Pallas. 



Spicil. Zool. 1780, as Helix lyonetiana. 



Besides the typical specimens which I have already recorded in my 

 'Handlist of Mollusca in the Indian Museum/ the following forms seem 

 worthy of record : — 



var. antoni, Pfeiffer. 



Zeits. Mai. 1847, as Gibbus antoni, from Mauritius [not Pupa antoni, Kiister, 

 1844, from Berbice] ; = Pupa grateloupiana, Pfr. 1868, from Mauritius. 



There are two specimens in the Museum, collected by myself in the 

 " Bois Sec," Savann% District, Mauritius. The above local name in my 

 ' Handlist' was unfortunately changed, during my absence on furlough in 

 Europe, to " Dry Forest," a name of no meaning ! 



var. sinistrorsa, nov. 

 In 1878 I noticed a reversed specimen in the museum at Lyons ; short- 

 ly afterwards I was fortunately successful in purchasing a second specimen 

 for the Indian Museum, out of the collection of the late Lombe Taylor. 



