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Show 46 ON LAND-SHELLS FROM BORNEO. [Jail, t), PLATE II. Fig. 1. Bya/cia busanensis, X 1*5, p. 31. 2, 2a. Helix (Chloritis) meander, X 2-5, p. 43. 3. (Geotrochus) niahensis, x 25, p. 44. 4. ( ) subjlava, X2*5, p. 45. 5. ( ) tigaensis, X 2'5, p. 44. (5. ByaJcia molwensis, X 1*5, p. 33. 7, 7 a. Helix (JEgista) pudica, X 2'5, p. 43. S. (Chloritis) plena, X 4, p. 44. PLATE III. Fig. 1. Everettia jucunda, Pfr., x 1*5, p. 34. 2. , var. depressa, X 1*5, p. 35. 3. Portion of radula, central teeth, X 330, p. 34. 3 a. Ditto, 50th, 51st, and 52nd laterals, X 330, p. 34. 3b. Ditto, from another specimen, the central tooth not so worn, X 300, p. 34. 4. Jaw, x 12, p. 34. 5. Extremity of foot, side view, X 4, p. 33. 5a. Ditto, view from behind, showing mucous gland, X 4, p. 33. 6. Generative organs, X 4 : B. Amatorial organ or dart-sac ; d., the calcareous dart, p. 33. 6a. Mucous glands of the above, further enlarged, X 7, p. 33. 0 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 dyaJcana, 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. Buryella hosci, n. sp., peristome imperfect, X 7, p. 40. 5 a. The mantle-margin taken off, 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. kusana, Aldrich, x 7, p. 40. PLATE V. Fig. 1. Helicarion whiteheadi, n. sp., nat. size, p. 21. 2. Helix (JEgista) grumulus, n. sp., x 4, p. -43. 3. Sitala orchis, n. sp., X 7, p. 40. 4. Bya/cia natuta, Metcalfe, the generative organs of, enlarged, p. 32. 4 a. The amatorial organ, further enlarged, to show the mucous gland:?, 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 sagitia amatoria, p. 30. 5 6. The latter, x 12, p. 30. (>. Xesta glutinosa, Metcalfe, edge of mantle taken off, showing the dorsal and shell-lobes, p. 25. (') a. Generative organs. (Jb. The male organ, much enlarged, to show the difference between this genus and Macrochlamys, p. 25. |