596 

Eight metamorphosed salamanders, 12 salamanders during the 
period of metamorphosis, and 7 larvae, were examined, with general 
results that may be set forth in tabulated form as follows: 
Table I. 
7 Larvae. 12 Trans- 8 Metamorphosed. 
forming. 
examined | 
Forms | (12—44 mm) (43—48mm) 47 51 60 62 68 70 83 86 mm, 
— 


Tonsil : 
patches 0 0 0.4.4178 Be 
found 


Table II. 
Tonsil 
En I I I IV VV. viL.vor IX x oon 

Times | 
found’) 4 9* a 2 6 2 4 2 1 1 i 

* Two lateral patches on the same side occurred three times. 
From these tables the following general conclusions may at once 
be drawn: (a) that these structures make their appearance only after 
transformation and relatively late, developing but slowly; (b) not 

Fig. 1. Fig. 2. 
Fig. 1. Preglottideal Tonsil. Drawing from a photograph to show the location 
of the preglottideal tonsil. Salamandra atra. >< 12'/,. 7. Tonsil. G. Glottis (cephalic end). 
Fig. 2. Sublingual tonsil. Salamandra atra. To show the position in relation 
to the tongue, ceratohyal, etc. >< 12%/.. T. Tonsil. 
in all the regions where they have been found do they appear with 
equal regularity. In three regions their appearance in a definite 
place was quite constant, namely, — in front of the glottis (IV), 
laterally in the mouth cavity in the general region of the location of 
_ 
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