1 I 4 MR. W. K. PARKER ON THE STRUCTURE AND 



developed. So also is the annular growth of the nasal wall [niv.), and the 

 appendages {x.l^.u.P.) that finish the nostrils (e.?i.). 



Tlie inner nostrils (fig. 8, i.n.) are very large, shoi't oval, and almost transverse ; 

 they turn a little forwards, withm. 



The palato-suspensorials are well developed, the fore part wide, with a slight pre- 

 palatine jarojection; the foot-like pedicle (j»Jc^.) projects well inwards, and the quadrate 

 condyle projects well outwards, reaches back behind the stapes (st.), and is large and 

 reniform, with a post-condylar lobe ; there is no ossification beyond the setting on of 

 the quadrate -jugal (qj.). 



The palatines and pterygoids {pa., pg.) are quite normal, but remain uncjrafted. 

 The Eustachian passages {en.) are only half the size of the inner nostrils, and are 

 reniform. The mandible (fig. 9) is perfectly normal ; it is rather high. The annulus 

 {ccty.) is large and perfect. The stapes (fig. 11, st.) is oval, emarginate in front, and 

 has a boss. The interstapedial {i.^t.) is nearly as large, is gently notched below, and 

 its fore third is ossified. The medio-stapedial {m.st.) is a strong phalangiform bar, 

 and ends in a perfectly normal spatulate extra-stapedial, with a cartilaginous supra- 

 stapedial, confluent above {est., s.st.). The stylo-hyal is also confluent above, and the 

 hyo-branchial apparatus (fig. 10) is perfectly Ranine. The investing bones are also 

 quite E-anine, but the fronto-parietals {f.p.) are very narrow in front, and fail to cover 

 the fontanelle perfectly ; they are like those of Pyxicephalus rufescens, but do not 

 unite, behind. The nasals (m.) are normal, but wide apart; all the marginal bones 

 are normal, but the squamosal {sq.) has an exceedingly long postorbital process. 

 There are no septo-maxUlaries; the parasphenoid {pa.s.) is exactly like that of a Rana, 

 but the vomers (y.) are not ; they are sub-quadrate, with short snags. Each bone 

 touches the septum nasi, the spike in front of the inner nasal ojaening is suppressed, 

 the front part ends in a spike, and the post-narial spike is short. The dentigerous 

 elevations are large, oval, and oblique. 



This Frog differs from its narrow-backed relations, with forked tongues, in having: — 



1. The whole skull feebly ossified. 



2. The interorbital region very narrow in front. 



3. The main fontanelle left partly uncovered by tlie roof-bones. 



4. The four bones of the hind skull small, and the girdle-bone imperfect above. 



5. No septo-maxillaries. 



G. The squamosal very long in its post-orbital region. 

 7. The stylo-hyals and supra-stapedials confluent, above. 



Second genus. Pelodytes. 



28. Pelodytes 2>unctatiis.- -Adult male ; 1^ inch long. Europe. 



The skull of this species is short, the breadth being to the length as 11 to 10; yet 

 it looks shorter than it is, on account of the great breadth of the nasal region. In 



