Miscellaneous. 485 



contained a large quantity of Banguinolent matter, and the anmilar 

 tolds of the vagina, whicli represent a more or less perfect oh uteris 

 were scarcely indicated. The maiumao arc at least 1"15 m. long, 

 with a maximum breadth of 0-2:^ m., and are only a few centimetres 

 thick; each of them is traversed by a longitudinal duct, which 

 commeiicos abruptly about 10 cm. from the anterior extremity, and 

 continues, without greatly increasing its calibre, as far as the 

 reservoir situated beneath the teat ; besides this two large lateral 

 ducts open into this reservoir, -wliich is of comparatively small size. 

 The milk is yellowish white, of the consistency of cream ; it lias an 

 ngreea])le nutty flavour. The mamma) are covered throughout their 

 entire length hy a layer of the cutaneous muscle ; this layer must 

 be the most active agent in the phenomena of compression which 

 produce the emission of the milk ; in front it acts chiefly by means 

 of its external aponeuroses, which are here almost the only covering 

 of the mamma ; posteriorly the muscle itself is applied directly to 

 the gland. The cutaneous muscle is elsewhere very well developed, 

 and in sevei'al regions of the flanks exceeds 4 cm. in thickness. In 

 front it covers at certain points the prolongations which arc sent off, 

 to a distance of 1 m. behind the junction of the lips, by the spongy 

 and largely areolar tissue, which contains the spermaceti oil in 

 abundance. 



The stomach is composed of ten successive chambers. The 

 capacity of the first is nearly equal to that of the nine other cham- 

 bers ; its mucous membrane is covered with convolutions which 

 are grouped round three perfectly distinct centres. The nine 

 subsequent chambers form a mammillated mass, which is very 

 sharply separated from the first ; they are separated from one 

 another by perforated septa, which were described a long time ago ; 

 the first is at the most as large as the fist, the last, on the other 

 hand, is of enormous size. In the duodenal dilatation, which is 

 greatly developed, wo observe a little ampiilliform swelling at the 

 orifice of the hepato-pancreatic duct ; besides this it presents a large 

 semi-lunar valvular fold in front of the point where it passes into 

 the narrow duodenum. There are a number of little glands at the 

 posterior extremity of the rectum, in the immediate vicinity of the 

 anus. The liver is divided into two lobes, one of wliich is situated 

 to the right, the other to the left ; to the right lobe is attached a 

 small dorsal one. 



The aortic trunk is greatly swollen at its exit from the heart ; 

 immediately above the sigmoid valves it gives rise to two coronary 

 arteries, and exhibits, besides, a perforated ductus arteriosus which 

 brings it into connexion with the pulmonary artery. The thoracic 

 plexuses are much less developed than those of the Delphinidse, but 

 more so than those of the Mysticetes. Instead of extending to the 

 further end of the thoracic chamber, the network terminates 

 posteriorly at the level of the sixth rib. The plexus of the right side, 

 which alone I was able to examine, is traversed, a short distance 



