1919. ] N. ANNANDALE & B. PrasHapD: Mollusca. 53 
1876. Planorbis convexiusculus, Hanley and Theobald, Conch. Ind., 
p- 48, pl. xcix, figs. 8-10. 
1886. Planorbis convexiusculus, Clessin, Die Fam. Limnaeiden in 
Martini and Chemnitz’s Conch. Cab. (ed. Kiister), p. 127, pl. xvii, 
fig. 9. 
1897. Planorbis compressus, v. Martens, Suss-u. Brackw. Moll. in 
Weber’s, Zool. Ergebn. Niederl. Ost.-Ind. IV, p. 13, pl. 1, figs. 
17-22, pl. xii, figs. 7, 10. 
1909. Planorbis saigonensis, Germain, Rec. Ind. Mus., Lil pe rr: 
1918. Planorbis saigonensis (?), Annandale, Rec. Jnd. Mus., XIV, p. 112, 
pl. xi, fig. 12. 
1919. Planorbis, convexiusculus, id., Rec. Ind. Mus., XV, p. 166. 
ee NS 
Fic. 7.—Shells of Gyraulus from pool in Residency garden, Quetta, 
Baluchistan. 
A. Gyraulus euphraticus, Mousson. B.  G. convexiusculus, Hutton. 
This shell is apparently very like that of G. albus, the type- 
species of the genus, but the whorls are deeper. It rarely exceeds 
