1908.] 



BATRACHIAN RHIXODERMA DARWINI. 



689 



to the ti^ansverso-scapularis muscle *, which is best seen on the 

 view presented by the dissection now being described, and which 

 is therefore dealt with here and not in its proper place. The 

 ilio-lumbaris gives off slips to the transverse processes lying between 

 its origin from the ilium and its insertion on to the fifth 

 vertebra ; but these are concealed from view when the body-cavity 

 is opened and the muscle exposed, for a considerable mass of its 

 fibres runs directly and without interi-uption between the extremes 

 ■of origin and insertion. It suggests, therefore, the long slip of the 



Text-fig. 147. 



Dorsal musculature o{ MJiinoderma darivini, 



■Cu. CucuUaris. i.sp. Infra-spinatus. Il.cocc. Ilio-coccygeus. L.d. Latissimus 

 dorsi. Ohl.iwt. Fan-shaped tract of obliquus internus attached to ilium. 

 Py. Pyriformis. rh. K-homboideus. 



ilio-lumbaris in Megalophrys nasuta t, which appears, however, in 

 that frog, and in the Pelobatidse generally +, to be more completely 

 diiferentiated from the rest of the ilio-lumbaris than is the case 

 with Rhinoderma darwini. More noteworthy is the exact likeness 

 which this muscle shows to the coi-responding muscle in Breviceps. 

 The coccygeo-sacralis and ilio-coccygeus are present and obvious 

 as is shown in the figure (text-fig. 147), but have no special 

 features of interest. On this view the glutceits, the rectus femor is 



* It is noteworthy that only one pair of these muscles appears to exist in HMno- 

 derma ; for there are two in Bana. The above dissection also showed plainly the 

 Levator anguli scapzdw arising from the skull quite as in Rana. 



t P. Z. S. 1907, p. 332, text-fig. 93, II. lumh. 



X p. Z. S. 1907, p. 871. 



44* 



