336 MR. F. E. BEDDARD OX THE AXATOMV [Apr. 9, 



near to the tip of the ilium. It forms a continuous mass without 

 tendinous intei'sections, giving oflf, however, slips to three trans- 

 verse processes only, upon the most anterior of which the muscle 

 ends. 



Text-fis'. 96. 



f-/- ( ' ^ 





oes.^^- 



\^Cocc.Il/. 



Some of the dorsal muscles of Ceratophrys ornata. 

 Lettering as in text-figs. 93 & 95. 



In Ceratojylirys the vertebrfe thus supplied by branches of the 

 ilio-lumbaris muscles are Nos. 5, 6, 7 ; but a few fibres are seen 

 to run on to the transverse process of the fourth vertebra. 



Biifo closely resembles Ceratophrys in all these features. The 

 ilia and the transverse processes of the vertebrfe are but little 

 covered with muscle — at any rate in Bufo marimts and B. agua, 

 the two species studied by myself. The ilio-coccygeal is, in pre- 

 cisely the same way, a much reduced muscle, commencing its 

 origin some way back upon the ilium and not extending upon the 

 ventral surface of that bone. The ilio-lumbaris is if anything a 

 rather slighter muscle than that of Ceratophrys. Otherw^ise it is 

 exactly similar in its appearance and I'elations to Bufo marinvs 



