46 ON LAND-SHELLS FROM BORNEO. [Jan. 6, 



Plate II. 

 Fig. 1. Byakia busanensis, X 1"5, p. 31. 



2. 2 a. Helix ( Chloritis) meander, X 2-5, p. 43. 



3. {Geoirochus) niahensis, X 2'5, p. 44. 



4. ( ) suhflava, x2-5, p. 45. 



5. ( ) tiffoensis, X 2 '5, p. 44. 



6. Dyakia mo/iiensis, X 1'5, p. 33. 



7. 7 a. iZe/i-r {Mgista) pudica^ X 2-5, p. 43. 



8. (^Chloritis) plena, X 4, p. 44. 



Plate III. 

 Fig. 1. Everettia jucunda, Pfr., X 1"5, p. 34. 

 2. , var. depressa, X I'O, p. 35. 



3. Portion of radula, central teeth, X 330, p. 34. 



3 a. Ditto, 50th, 51st, and 52nd laterals, X 330, p. 34. 

 36. Ditto, from another specimen, the central tooth not so worn, X 360, 

 p. 34. 



4. Jaw, X 12, p. 34. 



5. Extremity of foot, side view, X 4, p. 33. 



5 a. Ditto, view from behind, showing mucous gland, X 4, p. 33. 



6. Generative organs, X 4 : 2). Amatorial organ or dart-sac ; d., the cal- 



careous dart, p. 33. 



6 a. Mucous glands of the above, further enlarged, X 7, p. 33. 



6 b. The dart enlarged, X 7, p. 33. ^ 



Plate IV. 

 Fig. 1. Microcystis tersa, Issel, X 4, p. 36. 



2. Microcystina infans, Pfr., X 4, p. 37. 



3. st.johni, x 7, p. 38. 



3 a. , columellar margin enlarged, p. 38. , 



4. Microcystis dyakana, n. sp., x 4, p. 37. 



4 a. , animal from spirit-specimen, showing dorsal and shell- 



lobes, right side, X 4, p. 37. 

 4 b. Ditto, ditto, view of left side, X 4, p. 37. 



4 c. Part of generative organs, p. 37. 



5. Durgella hosei, n. sp., peristome imperfect, X 7, p. 40. 



5 a. The mantle-margin taken oiF, showing the different lobes, p. 41. 

 5 b. Central teeth of radula, p. 41. 



6. Sitala everetti, n. sp., X 4, p. 39. 



7. angulata, Issel, X 7, p. 39. 



8. kiisana, Aldrich, x 7, p. 40. 



Plate V. 

 Fig. 1. Helicarion whiteheadi, n. sp., nat. size, p. 24. 



2. Helix {Mgista) grumulus, n. sp., X 4, p. 43. 



3. Sitala orchis, n. sp., X 7, p. 40. 



4. Byakia namta, Metcalfe, the generative organs of, enlarged, p. 32. 



4 a. The amatorial organ, further enlarged, to show the mucous glands, 



p. 32. 

 4 b. Central teeth of radula, X 220, p. 32. 



4 c. The 80th and 81st laterals, X 360, p. 32. 



.5. Byakia hugonis, Pfr., generative organs ; x, position of the calcareous 

 dart, p. 30. 



5 a. The posterior end of amatorial organ, much enlarged, to show the 



form of the sagitta amaloria, p. 30. 



5 b. The latter, x 12, p. 30. 



6. Xesta glutinosa, Metcalfe, edge of mantle taken off, showing the dorsal 

 and shell-lobes, p. 25. 



6 a. Generative organs. 



66. The male organ, much enlarged, to show the difference between this 

 genus and Macrochlamys, p. 25. 



