1871.] F. Stoliczka — Notes on terrestrial Mollusca. 157 



if the penultimate whorl has no trace of a constriction, — (c), Diancta 

 (with the only species D. constricta), only admissible if there be 

 no tooth or truncate columella in the aperture ; (d), Arinia (type 

 A. minus) and (e), JVicida, Blanf. (type N. Nilgirica), the latter ad- 

 missible as distinct from the former, if Arinia has no internal 

 parietal plait and the columella not twisted. Mousson's numer- 

 ous species of Diancta are certainly nothing but Diplommatince, and 

 I also very much doubt whether there is sufficient reason for re- 

 taining Paxillus as distinct from Diplommatina. 



2nd, Clostophis of Benson. I have not been successful in the 

 discovery of a specimen at the Farm-caves, or in any other locality 

 about Moulmein. 



3rd Ojjisthostoma, Blanf., is a good distinct genus of the Diplom- 



MATINID^E. 



Sul-fam. ALYCMW2E. 

 The only interesting species, which I found on the limestone 

 hills south of Moulmein, is the very rare Alyccdus Michthofeni, Blf., 

 (Contrib. Indian Malacol., No. 4, Journ. A. B. for 1863, vol. xxxii, 

 p. 324). Only a single specimen occurred. Blanforcl's description 

 is excellent. 



Fam. HJELICINIDjE. 

 Suh-fam. HYDROCENWjE. 

 Georissa* liratula, Stol., pi. vi, fig. 5. 



Geo. testa globoso-conica, solida, imperforata, carneo-luteola j 

 anfractibus 3 - 3^-, convexis, sutura profunda simplici junctis, 

 primo apicem subobtusuin formante mammillato, lgevigato, luteolo 

 vel rubescente, coeteris supra (infra suturam) paululum depressius- 

 culis, spiraliter liratis, liris acutis, simplicibus, fere aBquidistanti- 

 bus, in anf. penultimo 6-7, in ultimo 9-10, basi convexa, centrali- 

 ter minute multistriata ; apertura seinilimari, altitudine fere spiram 

 sequante, haud dilatata ; labro simplici, curvato, intus striato, labio 

 incrassato, albiclo, adnato, intus rectiusculo, leevi. Operculum tes- 

 taceum, tenue, diaphanum, latiuscule semilunare, (nucleo excentrico), 



* I prefer keeping Georissa as distinct from Hydrocena, in the hope of 

 examini ug the animals of both the typical species at an early date. For the 

 relation of the two genera vide W. Blanford in Ann. Mag. Nat. Hist, for 

 November, 1870. 



