116 LIMN^EIDJE. 



obliquatis ; apertura semi-luuari, obliqua, alba ; colore externo 

 fusco, subcorneo. 



Shell greenish brown, finely ridged ; spire rather flattened ; 

 whorls 3, last large ; aperture angularly raised, then depressed, 

 sloped, expanded below, rather produced ; lower disc broadly 

 concave. 



Alt. 10-25, diam. maj. 2O5 mm. (fig. 10 in Conch Lid.). 



Hob. India; Ceylon. (Generally diffused.) 



The P. coromancielicus, Kiister, described and figured by Sowerby 

 in Reeve's 'Conchologia Iconica,' vol. xx, pi. 4, sp. 34, seems to 

 be a synonym. 



Var. eburneus, Gray, Sowerby, in Reeve, Conch. Icon, xx, pi. 5, 

 sp. 38 ; Clessin, in Conch .-Cab.* 1885, p. 226. 



Shell high, tumid, undulating, smooth, white, banded with 

 chest-nub in the middle of the whorls ; apex small ; whorls 3, 

 rather flattened above then sloped, inflated below ; last large, 

 high, rapidly increased ; lower disc convex, apical whorl hidden ; 

 aperture large, flexuously depressed above, inflated below, 

 produced. (Sowerby in Reeve.) 



Diam. maj. 17, diam. min. 13'5 mm. (fig. 386 in Conch. Icon.). 



Hob. Ceylon. 



Var. brimneus, Gray, Adams, Genera, ii, 1858, p. 261 ; Sowerby, 

 in Reeve, Conch. Icon, xx, pi. 5, sp. 40 ; Clessin, in Couch.- 

 Cab. 1885, p. 226. 



Shell subglobose, high, smooth, ferruginous, spire small ; whorls 

 contracted above, raised, a little angular above the suture, then 

 rounded, inflated in the middle ; lower disc narrowly umbilicated ; 

 aperture semilunar, produced and expanded below. (Sowerby in 

 Reeve.} 



Alt. 8-25, diam. maj. 12'5 mm. (fig. 406 in Conch. Icon.). 



Hab. Bombay. 



The following are the dimensions taken from Sowerby 's figures 

 in Reeve: alt. (excluding labrum) 6'5, diam. maj. 11 -25, diam. 

 min. 9 ; aperture : alt. (including labrum) 8, diam. 6 mm. 



There can be little doubt that it is a small variety of PI. exustus. 



Var. zonatus, .Dunker, in Conch.-Cab. 1884, p. 117, pi. 17, 

 fig.l. 



Alt. 6^, diam. 16 mm. 



Hab. Ceylon. 



Appears to be irregularly transversely banded with purplish red. 



228. Planorbis zebrinus, Dunker. 



Planorbis zebrinus, Dunker, 

 figs. 11-13. 



Original description : PL testa solida, straminea strigisqne rufis 



Planorbis zebrinus, Dunker. Conch.-Cab. 1850. p. 57, pi 6, 

 figs. 11-13. 



