1-iO LAND ANB FEESHWATER 



Sykes, are closely allied to this genus. The anatomy on the whole 

 is characteristic of genera inhabiting islands of the southern 

 hemisphere. 



EXPLANATION OF PLATE LXXXIII. 



Macrochlamys pedina, Beuson. Bombay. 



Fig. 1. Shell- and luantle-lobes detached, X 4. 



2. Generative organs detached, X 4. crp, ccecum musciili retracforis 



penis of Semper. 

 2a. Ditto, heruiaplirodite-diict and albumen-gland, X 4. 



3. Male organ coiled as in nature, X 4. 



3 a. Ditto, part near the retractor muscle attachment opened out, showing 



CEeaum, x 8. 



4. Amatorial organ, showing the papilla, X 8. 



4 a. Ditto, the amatorial rod opened out, X 8. 



4 h. Ditto, section through the amatorial organ near the middle, X 4"5. 



5. Spermatophore, entire, from the spermatiieca, X 4"5. 

 .'') a. Ditto, portion at base of capsule, x 30. 



5 b. Ditto, portion near middle of flume, X 30. 

 5 c. Ditto, head of the capsule, X 24. 



EXPLANATION OF PLATE LXXXIV. 



Eiirychlamys platychlamys, W. T. Blf. Bombay. 



Fig. L Animal, viewed from rigiit side, showing the mantle-lobes, x 4'5. 



1 a. Left side, ditto, X 4'5. 



1 b. Shell, X 2-4. 



1 c. Jaw, X 12. 



1 d. Generative organs, X 4. 



1 e. The male organ from another specimen, X 12. 



Eurychlamys rcgulata, Benson. Oeylon. 



Fig. 2. Animal, viewed from the right side, X 45. r.s.l, right shell-lobe 

 turned down (inside surface of). 



2 a. Ditto, riglit side, X 2. Right shell-lobe in true position. 

 2b. Shell, X 2-4. 



2 c. Sculpture of shell near suture, X 30. 



2 d. The shell- and mantle-lobes detached from the animal, X 4. 



2e. Jaw, X 12. 



2/. Central and median teeth of radula, X 368. 



2g. The male organ and portion of genitalia, X 8. 



EXPLANATION OF PLATE LXXXV. 



Eatnadvijna irradians, Benson. Ceylon. 



Fig. 1. Animal, view of right side showing the shell- and mantle-lobes, X 25. 



2. Shell- and mantle-lobes, left side, X 2-4. 



3. Sole of foot showing the medial fold and segmentation, X 4o. 



4. The buccal mass, X 4. 



5. Shell from above, X 2'5. 

 5 a. Ditto, side view, X 2*5. 



6. Part of the genitalia : male and amatorial orgms, X 2'5. 

 6a. Male organ, another view, x 25. 



7. Jaw, X 8. 



8. Teeth of radula, central and median, X 368. 

 8 a. Ditto, outermost laterals, X 368. 



