268 



MR. G. P. MUDGE ON THE MYOLOGY 



Table 



Conurus cactonim .... 

 Palaornis torquata. . . . 

 Brotogerys (right hand) 



Psittacus 



Echctus 



Coracopsis 



Ghrysotis vindigena . . 



,, ccsdva 



,, panamensis 

 „ ochrocephala 



Cyanolyseus patagonicus 



Ara macao 



Alicroglossiis 



Cacaiua triton, 



Stringop)S 



Nasiterna pusio 



Calopsittacus 



Cacatua leadbeateri 

 „ sidphurea .... 



Cacatua gdlerita 



Ara ararauna 



Cacatua roseicapilla . . . . 



„ alba 



CalyptorJiynchus funereus 

 „ haii/csii. . 



The Evolctton of the Tundon of the 



CkuATOGLOSSI'S INFEIlIOIt. 



Tmk kxtension of 

 THE Ckuatoolossus 



I.SFEJllOll I'O.STICUS 



AI.ONC THE 



IlTl'CjnitANCniAL. 



Stage 5 {continued). 

 thickened tract is slightly more pro- 

 nounced. 



Stage 4. 



Tho ceratoglossua inferior posticus 

 is inserted to a slightlj' thickened, 

 elongated tract in the ventral ten- 

 dinous fascia of the ceratoglossus 

 inferior anticus. This tract fore- 

 shadows the formation of the distinct 

 tendon of higher stages. 



Stage 3. 



The ceratoglossus inferior posticus 

 has separated from the parent muscle 

 (cg.i.a), but is still connected with 

 the tendinous fascia of that. 



Stage 2. 



The ceratoglossus inferior antious 

 has grown back upon the h)-pobran- 

 chial, and forms a very rudimentary 

 ceratoglossus inferior posticus. Other- 

 wise as in Stage 1. 



Stage 1. 



The muscle is composed of the 

 ceratoglossus inferior anticus only : 

 the inner part is strongly developed, 

 and the ventral fascia is tendinous. 



as 

 f 



r 



i 

 i 



1 

 J 



1 





 

 

 

 



The amount <t 



liETIl>l(,'IlE8EION 



OF CG.I.A'. 



between II & III 

 II 

 II 

 II 

 I 



between I & II 



II 

 I 

 II 

 I 

 I 

 I 

 





 I 

 I 

 

 



I 





 

 

 



