﻿TRIGONOPHRYS RUGICEPS. 369 



transverse processes of the sacral vertebras measure three lines in length and are 

 thicker at their external extremity; the os coccygis is depressed, nine lines in length: 

 the iliac bones and those of the extremities present nothing remarkable ; the sternum 

 does not differ materially from that of Geratophrys. The difference in the structure 

 of the skeleton in this animal and Rana pipiens, or common bull-frog, is very striking ; 

 indeed, it could hardly be greater in two genera belonging to the same family. The 

 orbitar foramina are more than double the size ; the nasal openings very large ; the 

 scapula remarkable for their great breadth, and the ribs are of nearly equal length. 



Viscera. — The skin is very loosely attached to the thin and semi-transparent fascia 

 covering the muscles, its inner surface presenting numerous inosculating small vessels 

 distributed over its surface; immediately beneath this fascia two muscles shew them- 

 selves on each side, broad at their base and fanlike, the anterior inserted into the upper 

 surface of the humerus near its proximal extremity, the inferior into the symphisis pubis. 

 On cutting into the peritoneum ; the liver consists of three lobes occupying the right and 

 a portion of the left side of the abdominal cavity, the right lobe trefoil in shape, the 

 middle somewhat pyriform, and the left more or less quadrangular in shape, its anterior 

 margin presenting a waved outline ; the gall bladder is quite distinct ; the heart lies 

 immediately above the liver, enclosed in its pericardium, and consists of a ventrical 

 and two auricles, the left comparatively empty, the right much distended with clots 

 of coagulated blood; the ventricle measures six lines in length by five in breadth ; 

 the oesophagus communicates with the stomach by a large opening; the latter is a large 

 membranous sac, two inches five lines in length, by an inch and a half in breadth at 

 its greater extremity ; it occupies, when extended, nearly the whole of the left portion 

 of the abdominal cavity ; on cutting into it, it was found to contain numerous Coleop- 

 tera, (Trox,) a portion of vegetable matter and the half digested skeleton of a hyla. 

 The intestine measures 14 h inches (Fr.) in length from the pyloric orifice to the 

 commencement of the cloaca, the diameter of which, as usual, is larger than that of 

 the intestine, and measures in length about 3J inches. The ovaries are of a black 

 color, and contain a great many eggs of a yellow color, of the size of a pin's head ; 

 the lungs lie posterior to the other viscera, and, when somewhat distended, reach 

 nearly the whole length of the abdominal cavity ; the cells, as usual in the frogs, are 

 quite large, and divided by membranous septa; the fatty bodies are much developed, 

 and present numerous subdivisions, thirteen on the right and seven on the left side ; 

 there is a very small triangular spleen ; the kidneys are one inch in length by three 

 in breadth. In a specimen of Ceratophrys, about half the size of Trigonophrys, the 

 liver presented three lobes deeply cleft, but the right lobe was destitute of the trefoil 

 arrangement of the former, the anterior margin being nearly straight, the lobe itself 

 triangular in shape; the specimen having been immersed in strong alcohol, the 



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