Siredon into Amblystoma. 369 
angle of about 45°, with the external nostrils above the sur- 
i Frequent efforts to leave the water soon followed, and 
40 opportunity of so doing was in most instances speedily im- 
@ ta and the change then seemed to progress more rapidly. 
; or two specimens, however, showed for some time, es 
tive element, apparently suffering little or po inconvenience 
from remainin. 
ar propensities of 
ecasional assaults on one 
of movement, and when irritated, especially when held 
, Would often turn and snap at the hand with a ra- 
ressed with great rapidity, but it apparently ceased, or 
Whil very slight progress, in the cool 
staan time, but were less favorably situated, required at 
: twice that time for its completion. The only living speci- 
Shown slight indications of an approaching metamorphosis, but 
48 its larva (hitherto known only as Siredon lichenoides 
AGL Jour. Scr.—szcoxp Serres, Vou. XLVI, No. 138.—Nov., 1568. 
25 
