OF THE SKULL IN THE AMPHIBIA UKODELA. 211 



Fig. 5. Another section taken further back, x 17 diam. 



6. A section of the same skull through the middle of the auditory capsule, x 17 diam. 



7. Hyohranchial arches of adult (3rd Stage) , one side partly removed, x 5 diam. 



Plate XV. 



Fig. 1. Salamandra maculosa. Another section (1st Stage), through the eyeballs, x 17 diam. 



2. A similar section made behind the eyeballs, x 17 diam. 



3. A section made through hinder part of auditory capsule, x 17 diam. 



4. A section made at junction of exoccipital region with ear-capsules, x 17 diam. 



5. Skull of a ripe embryo of same species (2nd Stage), upper view, x 15 diam. 



6. The same, lower view, x 15 diam. 



Plate XVI. 



Fig. 1. Skull of the adult Salamandra maculosa (3rd Stage), upper view, x 5 diam. 



2. The same, lower view, x 5 diam. 



3. The same, side view, x 5 diam. 



4. Chondrosteous endocranium of same, upper view, x 5 diam. 



5. Vertical section, with investing bones, showing interior of skull, x 5 diam. 



Plate XVII. 



Fig. 1. Skull of Notophthalmus viridescens (larva), 1 in. 28 lines long, upper view, x 15 diam. 



2. The same, lower view, x 15 diam. 



3. Part of skull of a similar larva, upper view, x 15 diam. 



4. Visceral arches of same, upper view, x 15 diam. 



5. Skull of adult of same species, upper view. x 7^ diam. 



6. The same, lower view, x 7\ diam. 



7. The same, side view, x 7\ diam. 



8. Mandible of same, inner view, x 7\ diam. 



9. Hyohranchial arches of same, with larynx, upper view, x 7% diam. 



Plate XVIII. 



Fig. 1. Skull of adult Cynops 2»jrogaster, upper view, x 6§ diam. 

 x 2. The same, lower view. X G§ diam. 



3. The same, side view, x 6| diam. 



4. Mandible of same, outer view, x Gf diam. 



5. The same, inner view, x Gf diam. 



6. Front view of skull of same, x 13] diam. 



7. Hyohranchial arches of same, x Gf diam. 



8. Part of auditory capsule and stapes of second larva of Spelerpes salmonea*. x 22i diam. 



9. The same part in the adult skull of Desmognathus fuscus, left side, x 20 diam. 



10. The same part of the skull in the adult Spelerpes rubra, x 20 diam. 



11. Stapes of Desmognathus fuscus, right side, x 25 diam. 



Plate XIX. 



Fig. 1. Skull (part) of Omjchodactytus, adult, upper view, x 10 diam. 

 2. The same skull (perfect), lower view, x 10 diam. 



* Inadvertently this is given as X 30 in the plate itself; and the figs. 9 and 10 have been wrongly numbered in 

 the plate. 



