PLATE III. 



FIG. SIZE. 



1. Proteus anguinm~ (adult). Shoulder-girdle; lower view . . 4 diam. 



2. Cryptobranchus japonicus* (adult). Right Shoulder-plate, humerus, and 



Sternum ; inner view. From Hyrtl's figure nat. size. 



3. Do. do. outer view. From Hyrtl's figure . do. 



4. Menopoma alleghaniensis * (young). Inner view of right Shoulder-plate, humerus, 



and Sternum. From Hyrtl's dissection 



and figure . . .2 diam. 



5. Siren lacertina* (adult female). Right Shoulder-plate ; inner view . do. 



6. PlKenerobranchus mexicanus 1 and 6 (adult female). Right Shoulder-plate ; inner 



view . . . .3 do. 



7. Lissotriton punctatus 1 (5j lines long). Left Shoulder-plate and part of 



humerus ; outer view . . 40 do. 



8. Do. (10 lines long). do. and Sternum ; outer 



view '.' . 30 do. 



9. Do. (1 inch 2 lines long). Sternum; upper view . . do. 



10. Do. (adult). Sternum; upper view . . . 12 do. 



1 1 . Do. (do.) do. lower view . . .do. 



12. Do. (do.) Left and part of right Shoulder-plate and Sternum ; 



outer view . . 8 do. 



13. Do. (1 inch 8 lines long). Right Shoulder-plate and Sternum ; 



inner view . . . 12 do 



14. Do. (adult). Section through edges of Shoulder-girdle and Sternum . 50 do. 



1 Mr. Mivart informs me that this is merely the Axolotl (Siredon) under another name ; if so 

 this figure represents a very interesting stage, as the two new bony centres have appeared which show- 

 that Hyrtl's specimen was ready to be transformed into Amblystoma. 



See pp. 58, 59. 3 See pp. 60, 61. 4 See p. 60. 



5 See pp. 61, 62. 6 See p. 62. 7 See pp. 63, 64. 



