of the Fishery Board for Scotland. 119 
| | 
| G, Esmarkii. | G, Minutus. | G. Luscus. Total at Each Size. 
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THE Bopy DIMENSIONS. 
The comparison between the three species is instituted then by means 
of the following body dimensions :— 
Tue Grrr is measured by means of a thread passed round the fish at 
three points :—(1) Pectoral Girth—in the axilla close to the base of the 
pectoral fin. (2) Girth at anus—at the level of the anus. (3) Girth at 
the root of the tail—at the thinnest part of the caudal peduncle, z.e., the 
part of the tail extending between the end of the third dorsal fin and the 
beginning of the caudal fin. 
Dorso-VENTRAL HetcHt or Bopy.—This dimension was measured by 
callipers. For the pectoral height the point of the callipers was put 
between the bases of the ventral fins, while the other point was made to 
touch a point in the dorsal line, immediately above. The callipers were 
made to touch the parts lightly. The other two points were at the level 
of the anus and on the root of the tail, at the narrowest part. 
DIAMETER OF THE EyE.—The diameter of the eye was the horizontal 
diameter of the orbit. 
INTERORBITAL Space.—The interorbital space is the distance on the 
dorsal surface of the head between the orbits. 
GREATEST LENGTH OF THE VENTRAL, PectoraL, AND First Dorsai 
Fins, —The fin was measured from the base of the first ray, 7.e., in the 
