,g88 MR. F. E. BEDDAKD ON THE [June 16, 



obscure. Still it seemed to be free of the underlying musculature 

 including the longissimus dorsi except just at the spinous processes 

 •of the vertebrae. 



The rhomboideics (or retrahens scaptdce) differs, as I have 

 pointed out, in Banco gim^yi * and R. esculenta ; for in the former 

 species it arises from the spine of a vertebra and is thus a true 

 rhomboideus and not a serratus. 



So also is this muscle in Rhinoderma darivini. It arises in front 

 of the latissimus dorsi and is partly overlapped by it. It is at 

 first rather broad, but narrows rapidly when it passes under the 

 cucullaris into a narrower but still flat and strap-shaped muscle 

 to be attached to the scapula. 



The depressor mcmidibtdce is partly absent in this frog. There 

 is no trace that I could discover of the dorsal part arising near to 

 the latissimus dorsi. Nor do I think it possible to have missed 

 this part of the muscle which is so obvious in those frogs where 

 I have looked for it. It is important to notice that in this 

 particular Rhinoderma agrees with its ally Breviceps. The other 

 portion of this muscle, however, that arising from the skull-wall, 

 is very large and passes as usual behind the tympanum, its 

 antithesis, the temporalis, passing in front of the tympanum. 

 Both these muscles are large and about equally developed. 



The infraspinaiibs appears to cover the dorsal surface of the 

 scapula nearly entirely from the extreme edge of its ventral 

 margin. Only a thin edge of the scapula (indicated by dots in 

 text-fig. 147) is left exposed, not so much as in Breviceps. 



The cucvllaris, or levator scapidce, is a large and well-developed 

 muscle as is shown in the figure (text-fig. 147). Its direction is 

 oblique, the obliquity being towards the dorsal median line postero- 

 anteriorly. In this region it covers a part of the anterior section 

 of the longissimus dorsi, that inserted on to the head. 



The longissimus dorsi is quite like that of Rana, and is shown 

 together with the adjacent muscles in the accompanying text- 

 figure (text-fig. 147). They all agree on the whole with those of 

 Rana, and a reference to my figure will show this agreement in 

 detail. The ilio-limibaris is rather more marked on the dorsal 

 .surface. The view of this muscle from the inside of the body is 

 rather different from that of Rana f. It runs uninterruptedly 

 over the transverse processes of four vertebrae (beginning with the 

 sacral +), and was finally inserted on to the one in front, i. e. the 

 fifth reckoning from behind forwards. This is also the fifth 

 vertebra of the series commencing with the atlas. From this 

 vertebra to the fourth a band of muscles runs in the same straisfht 

 line as the iho-lumbaris, but not m continuity with its fibres. 

 This transverse process (that of the fourth vertebra) gives origin 



* Anatomy of Fipa , P. Z. S. 1895, p. 835. I am able to confirm tliis statement 

 .after a re-examination of that frog. 



t Beddavd, P.Z. S. 1907, p. 333, text-fig. 94 {Eana ffuppi/i). 

 X I may note that this vertebra was not fused with the coccyx. 



