MOLLUSCA OF INDIA. 141 



EXPLA.NATION OF PLATE LXXXVI. 



Euplecta prcseminens, Sykes. Ceylon. 



Fig. 1. Animal viewed from the right side, shell removed ; point of araatorial 

 organ is seen projecting from the generative aperture, X 2"4. 



2. Shell- and dorsal lobes, X 4-5. 



3. Extremity of foot, vievced from behind, X 8. 



4. Genitalia, male and amatorial organ, X 4'5. crp, cmcum musculi 



refractoris penis of Semper. 

 4 a. Male organ, from another side, X 4'5. 

 4 b. Ditto, ditto, X 4-5. 

 4 c. Uterus, oviduct, and vas deferens, X 45. 



5. Jaw, X 8. 



6. 6 «, 6 A. Teeth of radula, X 368. 



7. Portion of shell showing sculpture, X 30. 



EXPLANATION OF PLATE LXXXVII. 



Euplecta partita, Pfr. Ceylon. 



Pig. 1. Generative organs, X 4"5. crp, ccBciim musculi refractoris penis of 

 Semper. 

 1 a. Male organ, from another side, X 4s5. 

 1 b. Part of, showing position of spermatophore in process of formation, 



X 8. 

 1 c. Ditto, ditto, X 8. , 



1 d. The dorsal lobes, X 4. 



1 e. Buccal mass and salivary glands, X 45. 



Macrochlamys flcmingi, Pfr. Murree, Punjab. 



Fig. 2. Spermatophore, X 45. 



2 a. Ditto, part of, still further enlarged, X 24. a, b, c, spines of. 

 2 b. Ditto, posterior end of capsule, X 30. 



2 c. Ditto, spines of (a', b'), X 30. 

 2 d. Ditto, a single spine (<;'), X 30. 



EXPLANATION OF PLATE LXXXVIII. 



Girasia hookeri. Gray, var. sliillongensis, G.-A. Kliasi Hills. 



Fig. L Spermatophore ( = fig. 8, pi. xxvii. P. Z. S. 1880), X 4. 



1 a. Ditto, basal fronds ( = fig. 8 a, pi. xxvii. P. Z. S. 1880), x 20. 



1 6. Ditto, ditto ( = fig. 8 h, pi. xxvii. P. Z. S. 1880), X 50. 



1 c. Underside of foot, showing the segmentation of the mass ( = fig. 5, 



pi. xxvii. P. Z. S. 1880). 



Girasia hookeri. Gray. Khasi Hills. 



Fig. 2. Side view of animal showing the main retractor muscles and site of 

 their several attachments, nat. size. 



2 a. Side view, showing same, nat. size. 



2 b. View from beneath of upper wall of the body-cavity, showing the 



several muscle attachments, nat. size. 

 2 c. Ditto, showing position of heart, pulmonary cavity, &c., nat. size. 



m, edge of mantle. 

 2d. Sole of foot, lower floor of body-cavity, with muscle attachment of 



buccal mass, B/), nat. size. 

 2 c. The visceral sac, shell removed, viewed f]-om above, X 2 5. 

 2/. The visceral cavity from above, sliowing convolutions of the intestine 



and position of adjacent organs, X 2'5. 

 2g. The stomach with salivary glands, nat. size. 



