84 



LAND AND FRESHWATER 



EXPLANATION OF PLATE LXXV. 



Microparmarion pollonerai, Collinge & Godwin-Austen. Borneo. 



Fig. 1. Animal, from above (spirit-specimen), X 2"4. 



2. Ditto, right side, X 2-4. 



3. Mucous gland, X 4-6. 



4. Posterior end of visceral mass, shell removed, X 8. 



5. Buccal mass and salivary glands, X 8. 



6. Jaw, X 12. 



6 a. Central teeth of radula, X 368. 



6 b. Lateral teeth of radula, x 368. 



7. Generative organs, x 4. 



7 a. Male organ, with kalk-sac, X 4. 

 7 h. Ditto, muscular sac cut open. 



7 c. Interior of kalk-sac, showing the papillate surface, X 8. 

 Id. The calcareous dart of the amatorial organ, X 8. 



EXPLANATION OF PLATE LXXVI. 



Durgella levicula, Benson. Tenasserim. 



Fig. 1, 1 a, 1 6. Shell X 4. 



2. Animal, seen from right side (from spirit-specimen). 

 2 a. Ditto, from left side, much enlarged. 



2 b. Extremity of foot, as in life. 



3. Buccal mass, from right side. 



4. Jaw, X 58. 



5. Centre tooth of the radula, with two laterals, very much 



enlarged. 



5 a. Lateral teeth. 



6. Generative organs, X 8. 



6 a. The male organ, showing muscular dart, X 12"4. 



EXPLANATION OF PLATE LXXVII. 



Fig. 1. Durgella assaniica, G.-A. : shell, X 4. Durrang District, Assam. 



2. Ditto : portion of side of foot, much enlarged. 



3. Ditto : shell and dorsal lobes detached". 



4. Ditto : jaw, X 30. 

 6. Ditto : lateral teeth. 



5 a. Ditto: lateral teeth, much enlarged. 



6. Ditto : generative organs. Lettering as in other Plates. 



7. 7 a. Durgella mairangejisis, G.-A., X 4. Khasi Hills, 



7 b,7 c. Ditto, X 2-4. 



8. Ditto : extremity of foot. 



9. Ditto: jaw, X 12-4. 



10. Ditto : central tooth and side teeth, enlarged. 

 10 a. Ditto : outermost laterals, X 368. 



10 b. Ditto : five laterals, very much enlarged. 



11. Ditto: generative organs, portion of, X I2"4. 



EXPLANATION OF PLATE LXXVIII. 



Durgella dekhajiennis, Godwin-Austen. South India. 



Fig. 1. Shell, X 2-5. 



2. Animal and shell (spirit-specimen), showing shell-lobes, X 1"5. 



2 a. Ditto, part of, from the left side, X 1'5. 



2 b. Extremity of foot, showing mucous pores, X 8. 



2 c. Portion of sole of foot, X 8. 



2 d. Mantle-lobes detached : r.s.l., right shell-lobe &c. 



