of the Mammary Organs of the Kangaroo. 83 



Tab. III. 



Fig. 1 . Interior of the pouch of the virgin Kangaroo, in which 

 the lower teat on the right side has been produced by 

 artificially everting — a. The membranous canal of 

 the mammary gland, and projecting b. Its papillary 

 termination, c. The follicular aperture formed by 

 the opening of the canal, and through which the canal 

 with its papilla is pushed and everted. — Page 65. 



Fig. 2. Young Kangaroo supposed to be only a few days old, 

 figured to show the contrast between the extremely 

 minute aperture of the mouth at this early period, and 

 the extremity of the marsupial teat as shown in Fig, 3. 

 — Page 65. 



Fig. 4. Represents the young animal in a more advanced state ; 

 the teat to which it was attached is shown in Fig. 5, 

 which, it will be seen, bears a very close resemblance 

 to that which is produced by the artificial eversion of 

 the canal in the mamma, as shown in Fig. \. a.b. 



Tab. IV. 

 The panniculus carnosus of the Kangaroo, covering the 

 fore part of the abdomen, as described in page 68. 

 The muscular fibres will be seen encircling the mouth 

 of the pouch, to which they form a sphincter, and some 

 of the descending fibres are shown passing over the 

 pubis to be inserted into the cloaca, a. 



Tab. V. 

 This plate exhibits a view of the interior of the pouch of 

 an adult Kangaroo at the period of suckling, together 

 with the compressing muscle of the mamma, a. Com- 

 pressing muscle, h. Marsupial teat. c. Upper and 

 smaller teats. — Page Q9 and 72. 



M 2 Tab. 



