150 F. Stoliczka — Notes on terrestrial Mollusca. [No. 2, 



curved towards and loosely attached to the previous whorl, leaving 

 a rounded circular foramen behind it. The whorls of the operculum 

 are above peculiarly dentate. 



Ehiostoma Hatjgiitoni, Bens. 



An. and Mag. Nat. Hist , 3rdser., V, p. 96. — Reeve Iconica, vol. XIV Pterocy- 

 clos, pi. V, fig. 30.— Hanley and Theobald, Conch. Ind., pi. V, fig. 10. 



Young specimens have no trace of the upper notch at the outer 

 lip and are generically undistinguishable from the planorboid 

 Ci/clophori, like the Ceylon C. amiulatus, Trosch., or the Nilgher- 

 ry G. ravidus, Bens. Only in full grown specimens, the last whorl at 

 the aperture becomes detached from the previous whorl. The 

 operculum is first thin, flattened outside and slightly concave inside ; 

 gradually the shape becomes convex outside, as the whorls increase 

 in number, and at the same time the internal concavity enlarges. 



The animal is quite similar to that of Pterocyclus : it is dirty 

 white, with darker minute spots on the back, translucent pinkish 

 between the tentacles and partially on the front side of the foot ; 

 tentacles of moderate length, blackish, paler at the tips which are 

 hardly swollen ; the edge of the mantle fits very closely to the shell, 

 it is somewhat thickened, and has a small slit corresponding to the 

 upper tube-like incision on the outer lip ; the sides of the slit are 

 very extensible and secrete the tube. Young specimens generally 

 possess a distinct pinkish white tint on the entire body. 



Hal. At Damotha, (N. E. of Moulmein), on limestone rocks ; 

 found under decaying leaves and humus. The animal appears to be 

 more nocturnal in its habits, than the true Pterocycli, and is very shy. 



Fam. PUPINIDM. 



PoLLICARIA GRAVIDA, (Bens.). 



Eybocystis gravida, Bens., vide Pfeiff., Mon. Pneumonop. viv., suppl. 2nd, 

 p. 56. — Hanley and Theob., Conch. Indica, pi. 7, fig. 1,* Megal. gravidum, Bens. 



The peculiarity of this genus rests, I believe, chiefly in the 

 remarkably flattened growth of the last and penultimate whorls of 



* This figure is somewhat incomplete ; it doas not shew the short open canal 

 above the posterior angle of the mouth. The position of the operculum in 

 the aperture is not correct. It should rest on the internal swelling close to 

 the margin of the outer lip of the aperture. 



