386 MR. ST. GEORGE MIVART AND DR. J. MURIE [Julie 26, 



There is little difference in the liver, except that the posterior sur- 

 face of the left lobe has several superficial sulci, possibly a mere in- 

 dividual peculiarity. The gall-bladder is 1| inch long, extending 

 beyond the margin of the right division of the cystic lobe, and not 

 deeply buried in a fissure as in D. aguti. 



The heart * has the slight tendency to a double apex remarked by 

 Prof. Owen in D. aeuschy. 



The lungs have the same number of divisions as in the allied species. 



The kidneys answer Owen's description of these organs in D. 

 aeuschy, rather than that of Jones in J), aguti, not possessing the 

 separated portion spoken of by the latter observer. 



The external organs of generation and anus are closely approxi- 

 mated, indeed almost forming a cloaca. The urethra (p. 406. fig. 4, 

 U) opens about - 2 inch in front of the vulva. The latter (fig. 4, V) 

 lies - 4 inch in front of the anus, and its lips exhibit numerous folds. 

 The anal opening (fig. 4, A) has immediately behind it a semilunar 

 fold of skin, the convexity of which is posterior. On either side of 

 the anus the fold of membrane forms a deep pouch lined with short 

 hairs, and having numerous minute openings of muciparous glands, 

 and others which give exit to the ceruminous secretion of the anal 

 scent-glands (pp. 406, 410. figs. 4 &5,A.g). These anal glands are 

 two in number, and prominently situated one on each side of and 

 rather behind the external genitals. 



They are almond-shaped, and each about an inch in length, and 

 their structure consists of many larger and smaller cavities divided 

 by fibrous walls. The interiors of these cavities or loculi are lined by 

 mucous membrane, which abundantly secretes the viscid yellow sub- 

 stance which is not unlike the cerumen of the earf. Each gland 

 opens, as above said, by numerous apertures into one of the pouches 

 of the semilunar-like fold. 



The figure (fig. 4) which we have given shows the appearance of 

 these glands and the neighbouring parts in a partially dissected condi- 

 tion, and in a female specimen. Their outward or tegumentary aspect 

 in the male animal is admirably depicted by John Hunter's artists, 

 Bell and Rymscyk, in the fourth volume of the ' Illustrated Physio- 

 logical Catalogue of the College of Surgeons,' plates 52 and 53. 



The urinary bladder is a narrow elongated pyriform-shaped viscus, 

 about 3 inches in the length of its cavity ; but the distance from the 

 fundus to the orifice of the urethra is altogether about 6 inches, 

 the part, however, which may be regarded as the neck being com- 

 paratively wide : this at least was the case in our female specimen. 



The ureters open on either side of the bladder, not far from the 

 fundus. 



The vagina is rather wide, and 3| inches in length from the os to 

 the vulva. The mucous membrane is longitudinally plicated all this 

 distance. 



* Dr. Crisp states that this organ in the Hare is nearly five times the weight 

 of that of the Rabbit, the lungs of the former nearly four times as heavy, and 

 the calibre of the trachea nearly four times as great (P. Z. S. 18G1, p. 80). 



t As Prof. Rymer Jones has already remarked (P. Z. S. 1834, p. 82). 



