440 



LAND AND FRESHWATEK 



Macrochlamys decursus, n. sp. Munipur. 



Fig. 3. The right shell-lobe, with right and left dorsal lobes next the- 



respiratory orifices. No. 581 B.M. Coll. 



Siiala pealii, n. sp. Cachar. 

 Fig. 4, 4 a. Teeth of the radula, X 1100. 



Vallonia humilis, Hutton. N.W. Himalaya. 



Fig. 5. Jaw, X 175. 



5 a. Centre and admedian teeth of radula. 

 5b. Marginal teeth, X 1100. 



EXPLANATION OF PLATE CLl. 



EXPLANATION OF PLATE CLII. 



Cathaica Jiookeri, n. sp. Darjiling. 



Fig. 1. Shell, front view, X 1'5. 



la. Ditto, from above, X 1'5. 



1 b. Extremity of the foot, side view, X 4"5. 



1 c. Ditto, showing the sole, X 4"5. 



1 d. The generative organs, X 8. 



1 e. Dart-sac, X 24. 



1 /■. Ditto, X 8. 



Iff. Jaw, X 12-4. 



1 h. Centre and admedian teeth of the radula. Centre, with 1, 2, and 

 3 and 1 J, 12, 13. Much enlarged. 



1 i. Buccal mass (b) with retractor muscle, and part of intestine (i), 



X 4-5. 



Zonitoides notabilis, Sykes. Ceylon. 



Fig. 2. Animal, view of left side with shell, X 8. 



2 a. Ditto, head and part of mantle, right side, X 8. 



2 6. Ditto, visceral sac showing position of penis and dark under wall 



of the branchial sac, X 4'5. 



2 c. Jaw, X 58. 



2 d. Part of generative organs, showing penis and dart-sac, X 24. 



2 e. Part of same detached, spermatheca, X 24. 



2./". Ditto, another view of penis and dart-sac, X 24. 



2g. Genitalia, three figures showing difierent views of. 



b, buccal mass ; d, dart-sac ; i, intestine ; gen.ap, generative aperture • 

 h, heart ; ov, ovotestis ; p, penis ; r.in.p, retractor muscle of penis ; 

 sp, spermatheca ; vd, vas deferens. 



