112 DR. A. GiJNTHER ON THE ANATOMY OF MONITOR. [Mar. 26, 



entrance into the lungs. Each bronchus enters the lung a little 

 above the middle of its length, and emits a short branch with carti- 

 laginous rings for the upper portion of the lung : the principal stem 

 does not penetrate far into the substance of the lung ; its cartilaginous • 

 rings soon disappear, and there remains only a membranaceous tube 

 with numerous lateral openings. The lungs of both sides are nearly 

 equally developed and of moderate capacity ; their interior is amply 

 provided with cells and meshes, less so in their posterior extremity. 



The kidneys are elongato-cuneiform, entirely separated from each 

 other, and of equal size. Each is formed by about twenty lobes, 

 which are united only at the base. Each ureter is somewhat widened 

 before its termination, and opens together with the vas deferens of 

 its side in a small papilla, situated behind the valve which separates 

 the rectum from the cloaca. There is no urinary bladder. 



The testicles are subglobular ; the right one is situated nearly on 

 the middle of the abdominal cavity, the left one a little more down- 

 wards. The vas deferens is convoluted in its whole length, running 

 downwards along the inner side of the kidneys and of the ureters. 

 The double penis is 3i inches long when everted from the sheath in 

 which it lies concealed ; there is a groove running from the seminal 

 papilla along its whole length. The glans has on each side eight 

 cartilaginous transverse lamellae with ruffled margins, and termi- 

 nates in two white cartilaginous bodies similar in form to the root of 

 a human tooth, the one being simple, the other branching again 

 into three short processes. It is very singular that not only the 

 sheath in which the inverted penis lies, but also the penis itself, cast 

 their skin like the other external parts. 



The musculus retractor penis, as in all the Saurians, moves in a 

 sheath between the superficial caudal muscles and the muscles of the 

 haemapophyses ; the latter differ from the other muscles by their 

 white colour, by their softness, and by the loose connexion of the 

 different layers : they have quite the appearance of the muscles of 

 fishes ; and many of the layers have their outer margin free, not 

 attached to the aponeurotic membrane of the sheath. The muscular 

 fibres are transversely striped. 



Peritoneal ducts leading outwards, as they have been observed by 

 Plumier, Geoffrey, and Owen iu Crocodilians, do not exist in this 

 species. 



Fatty masses, of the same appearance and situated at the same 

 place as in Regenia, are found in this species. Although of enor- 

 mous size, when compared with similar collections of fat in other 

 reptiles, yet they are relatively smaller than in Regenia, equalling 

 about the eighth part of the weight of the entire animal. 



The cause of death may be considered to have been an extensive 

 ulcus of the stomach, situated on the curvatura major, nearer to the 

 pylorus than to the stomach. The stomach itself was empty ; there 

 was a small quantity of extravasated blood between the mucous and 

 muscular membrane round the ulcus. The rest of the intestines and 

 the other parts of the cavity of the chest and of the abdomen had a 

 quite healthy appearance. Very small irregular patches of a chalk-like 



