POLYGYRA ALBOLABRIS AND LIMAX MAXIMUS 299 



Pia. 



2 An enlargement of a part of tlie generative organs: 1 her- 



maphroditic duct; 2 talon; S albumen gland. 



3 Accessory gland, or talon, seen from above, x 6. 



4 The same as seen from below, x 6. 



5 The ovotestes, x 5. 



6 The cecal tubes of the ovotestes, x 30. 



7 A transverse section of the ceca of the ovotestes, showing 



the spermatic within the ovarian tube, x 30. 



PLATE 8 

 Pig. 



1 An exterior view of the penis, x 3. 



2 A longitudinal section of the penis, showing the corrugated 



fold, or pilaster, of the interior, and the manner of the 

 formation of the outer fold, or prepuce,.x 3. 



3 The penis opened from the dorsal part, showing the corru- 



gations of the lining membrane, and the corrugated fold, 

 pilaster, of the membrane, x 3. 



4 A part of the corrugated and papillate lining membrane, 



xlO. 



5 A transverse section of the vas deferens, x 6. 



6 A tranverse section of the vas deferens, showing its en- 



trance into the penis, x 6. 



7-9 Sections of the penis, figure 9 being beyond the pilaster, 

 x6. 



10 An exterior view of the vagina and receptaculum seminis, 



x4. 



11 A longitudinal section, showing the muscular folds of the 



vagina, x 4. 



12 A transverse section of the vagina, and of the oviduct at its 



entrance into the vagina, x 6. 



13 A transverse section of the vagina at the point indicated bj 



the dots in figure 11, x 6. 



14 A transverse section of the receptaculum seminis, x 6. 



