286 ZAGLOSSUS. 



lies in a loop of the small intestine. It measured 37 by 16 mm. in the young 

 specimen examined. Its duct is short and as just noted, joins that from the 

 gall bladder within the substance of the pancreas. Chapman (1887) in his 

 account of the anatomy of the Echidna states that the pancreas has a separate 

 duct in the specimen he studied and it enters the intestine at a point nearer the 

 pylorus than does the bile duct. This, as he admits, is contrary to the usual 

 condition, and must have been abnormal. 



Mesenteries. — The duodenohepatic ligament is short, about 15 mm. long. 

 About the same distance posteriorly is a short ligament binding the small in- 

 testine to the caudate lobe of the liver. The omental sac is largely developed, 

 consisting of a thin and delicate mesentery with deposits of fat along the courses 

 of the blood vessels. The large spleen is bound by it to the cardiac curvature 

 of the stomach. The mesorectum and the mesocolon go forward to the anterior 

 end of the large intestine, at which point the mesentery passes in a fan-shape 

 to the entire length of the small intestine except for a short space, about 15 

 mm., at a point nearly thrice that distance back from the pj'lorus. 



Spleen. — The splee7i (Plate 2, fig. 6) is practically like that of the Echidna, 

 proportionately large and of three distinct lobes: — a long narrow lobe, about 

 38 mm. long and 11 wide along the edge of the cardiac curve of the stomach, 

 a sunilar but longer (80 mm. by 10) lobe on the greater or posterior curvature, 

 and third, a lobe lying in the mesentery of the large intestine, narrow at first, 

 but becoming terminally a large rounded mass, about 28 nmi. in longest 

 diameter and 19 mm. in transverse diameter. 



Kidneys and genitalia. — The kidneys and genitalia seem to be quite as 

 in the Echidna. The former are large and rounded, about 32 by 23 mm. in 

 the specimen studied, and 18 mm. thick. The adrenal body lies just anterior 

 to the hilum on the medial side of the kidney, is oval in outline, and measures 

 about 14 by 7.5 mm. The ureters do not empty into the bladder directlj^ 

 but run each to a point at its mouth just posterior to the opening of the vas 

 deferens. The two ducts open here into the urethra by a conunon orifice pro- 

 vided with a small papilla. The testis is received into a slight hollow of the 

 body-waU. The penis lies in the floor of the cloaca. As in the Echidna its 

 gland is divided into four lobes. The cloaca is some 25 nun. long, and the 

 large intestine enters well posterior to bladder, ureters, and vasa deferentia. 



Lungs. — The lungs (Plate 2, fig. 7) seem rather .small in proportion to the 

 size of the animal. The right lung has two lobes. The larger extends the 

 entire length of the pleural cavity and enfolds the smaller or ventral lobe so 



