40 MR. F. E. BEDDARD ON THE [Jail. 14, 



others have not been missed. At the same time I cannot of 

 course positively assert that the individual was actually fully 

 mature, though there was no reason against this view. 



§ Eesu7ne*. 



As compared with Rana, Breviceps shows the following pecu- 

 liarities of structure : — 



(1) The rectus abdominis has but one tendinous inscription and 



its fibres fan out laterally running dorsoventrally, thus 

 replacing a portion of the obliquus externus. 



(2) Part of the obliquus externus is specialised into a strong 



muscle ending on the hyoid ; on to the base of this is 

 inserted the fan-shaped obliquus internus. 



(3) The sternoradialis is absent. 



(4) The subhyoideus muscle is twice the diameter of the sub- 



maxillaris. 



(5) A special muscle runs from the quadrate cartilage to the 



inner side of each ramus of the lower jaw. 



(6) The omohyoid is absent. 



(7) The sternohyoid is divided into two perfectly distinct 



muscles with widely separate insertions into the hyoid. 



(8) The obliquus externus is a purely fleshy muscle arising on 



either side in the middle line of the back by muscular 

 fibres. There is thus no fascia dorsalis. The obliquus 

 internus is similarly fleshy at its origin from the middle 

 line of the back below the former. 



(9) There is no depressor mandibulte muscle to be detected. 



(10) In the thigh the rectus internus minor is connected with a 



superficial cutaneous muscle, covering over a portion of 

 the thigh, which is its chief head of origin. The biceps is 

 A ery slender ; the adductors very large. 



(11) The posterior lymph-hearts are of enormous size, measuring- 



more than a quarter of the total length of the body. They 

 are attached by muscles to the skin dorsally and by two 

 separate and broad muscles to the transverse process of the 

 sacral vertebra and the pubis respectively. 



(12) The liver is composed of two lobes only which largely cover 



the heart. 



(13) The testes emit each only one vas efierens ; and the two 



tubes join before entering the substance of the kidneys 

 (which are here fused) in the middle line. 



(14) The oviducts are very short owing to the fact that they 



are but little coiled. 



* I do not include in the above resume external and osteological characteristics 

 already well known, nor all minutia of muscular structure. 



