PLATE CLII. 



[Part XIL— December Id U.] 



Cathaica hookeri, n. sp. Darjiling. 



Fig. 1. Shell, front view, x TS. 



1 a. Ditto, from above, x 1"5. 



1 b. Extremity of the foot, side view, x 4'5. 



1 c. Ditto, showing the sole, x4*5. 



1 d. The generative organs, x 8. 



1 e. Dart-sac, x 24. 



1/. Ditto, x8. 



1 f/. Jaw, X 12'4. 



1 A. Centre and admedian teeth of the radula. Centre, with 1, 2, and 3 and 11, 

 12, 13. Much enlarged. 



1 i. Buccal mass (i) with retractor muscle, and part of intestine {i), x4*."). 



ZoNiToiDEs NOTABiLis, Sykes. Ceylon. 



Fig. 2. Animal, view of left side with sliell, x 8. 



2 a. Ditto, head and part of mantle, right side, x8. 



2 b. Ditto, visceral sac showing position of penis and dark uudei' wail of the 



branchial sac, x4'.3. 



2 c. Jaw, X 58. 



2 (/. Part of generative organs, showing penis and dait-sac, x 24. 



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



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



2f/. Genitalia, three figures showing different views of. 



^, buccal mas.s : d, dart-sac; i, intestine; gen.up, generative aperture; h, heart; 

 ov, ovotestis; p, penis; r.m.p, retractor muscle of penis; .ip, spermatheca; 

 cd, vas deferens. 



