400 MR. F. E. BEDDAKB ON THE ANATOMY 



§ The Larynx. 



I do not here figure the laiynx of Megcdophrys feae because it 

 agrees substantially with that of other Oriental Pelobatidee figured 

 elsewhere by myself *'. There are, however, as 1 have shown in the 

 uiemoir referred to, at least specific differences among the Pelo- 

 batidse. I find that Megalophrys fece agrees very closely with 

 Xenophrys nionticola and thus differs from Leptobrachium hasseltii. 

 The hypopharyngeal processes of the cricoid cartilages are well 

 developed and remain separate, i. e. are not united into a single 

 bar. A delicate semicircular bronchial cartilage is quite obvious 

 attached or close to the anterior extremity of the cricoid cartilage. 



§ Muscles of Ventral Sarface. 



In removing the skin of the ventral surface in the pectoral 

 and icephalic region the septa bounding the lymph-spaces in that 

 region come into view. I have already figured these in Xenophrys 

 ononticola t, and the corresponding septa in Megaloplwys fem 

 appear at first sight to be much the same. The posterior of the 

 two is rather more chevron-shaped in the line of its attach- 

 ment perhaps ; but this may be a matter of vai-ying tension. On 

 the other hand, the same chevron line occurs in Leptohrachiuvi 

 hasseltiit. In Megalopkrys fece the line of insertion of the wall of 

 the subcutaneous lymph-sac does not extend obliquely downwards 

 on to the pectoi'alis abdominalis as in Leptobrachium. There 

 appears to be no invasion of this membrane by muscular fibres, and 

 in this the present species agrees with the two just referred to. 



The anterior wall of the pectoral or thoj'acic lymph-sac has 

 been figured by myself as a single wall in the two species which 

 are above referred to, and as arising from the edge (posterior) of 

 the submaxillaris muscle. I find precise]}^ the same origin in 

 Megalophrys fece ; but there is in addition another membrane 

 rising from the muscula,r surface behind this line which joins the 

 first-named to be inserted in common with it on to the skin. 

 This tent-like arrangement leads to the formation of an additional 

 sac, which is obviously triangular in section. I may, perhaps, 

 have missed something of the same kind in the other MegaJo- 

 phryid Fi'ogs which I have examined. Examined microscopically, 

 the two walls of membrane showed nothing but white fibrous 

 connective-tissue ; there was no trace whatever of any muscular 

 invasion, and, indeed, the edge of the submaxillaris could be 

 plainly seen to give off no fibres into the membrane. Inasmuch 

 as I observed this double wall in four examples of the Frog, there 

 can, I think, be little doubt of its being the normal arrangement. 



A further exploi'ation of this cavity shows that it is not a 

 lymph-sac at all ; it is the gular sac which is thus intruded 



* P. Z. S. 1907, p. 898, tpxt.-fiff. 238, p. 899, text-fig. 239, p. 902, text-fig. 240. 

 t P.Z.S. 1907, p. 882, text-ti-x. 231. 

 X Loc. cit. p. 88 i, text-tip:. 232. 



