556 
ALETS, 
EXPLANATION OF PLATE XXXVII. 
Surface views of the area between the eye and the first scales of the lateral line, 
taken at different ages, to illustrate the formation of the canal in sections, and the 
establishment of continuity between the sections by bringing two openings together 
to form one pore. 
Fic. 
FIc. 
Fic. 
Fic. 
FIG: 
Fic. 
23% 
24. 
25. 
26. 
2A 
28. 
From a specimen 19™™ long. 
From a specimen 201%4™™ long. 
From a specimen 23%4™™ long. 
From a specimen 26™™ long. 
From a specimen 29™™ long. 
From a specimen 30%4™™ long. 
x 40. 
X 40. 
X 40. 
X 40. 
X 40. 
X 20. 
