534 ALLIS. [Vou. II. 
ognizable. The organs of the supra-orbital line are well devel- 
oped, the first six being widely separated from the seventh and 
last, which cannot be distinguished in outward appearance from 
the pit organs lying immediately behind it. The cord connect- 
ing the canal organs is continuous with that connecting the 
organs of the pit line. On the infra-orbital line all of the organs 
up to No. 16 have appeared; and all, excepting Nos. I, 6, 11, 
12, and 13, which are always the last ones in this section of 
canal to be fully developed, have reached the outer surface. 
Organ 5 lies above the point where the anterior commissure and 
suborbital canal unite, and may from its position belong to either 
line. Up to No. 16 the cord of the line is continuous, but 
behind this it is broken or very faint. At the spiracular depres- 
sion it begins again, and is continued back into the lateral line. 
Organ 17 is the only one in this length of canal that can be 
distinctly recognized. The lateral line extends beyond the anus, 
and the accessory lateral line not quite to it, as shown in Fig. 
2. The dorsal body line begins opposite a bend in the main 
line a little in front of the point where the first organ of the 
lateral line will appear, and has already reached the top of the 
body, and turned backward along the edge of the dorsal fin. 
The end of the line is strongly swollen. Neither this line nor 
the supratemporal or middle dorsal pit lines are continuous at 
this age with the main lateral line. The supratemporal line 
shows two enlargements, from the median one of which the 
posterior pit line starts at a sharp angle. The middle dorsal pit 
line has a single well-developed organ, with the cord of the line 
extending on either side of it. The line of the mandibular 
canal is regularly developed to organ 10, the first two or three 
organs still being indistinct. The opercular part of the line is 
broken. Organ 15 and the rudiment of organ 16 le above the 
horizontal cheek line, and separated from it and from organs 12, 
13, and 14, none of which are fully developed. Organ 11 has 
not yet appeared. The vertical cheek line and mandibular sur- 
face line form a nearly continuous line, extending between organ 
8 mandibular and 12 infra-orbital. The gular line could not be 
found. 
In the 114-millimetre specimen (Fig. 6, Pl. XX XI.) the cord of 
the infra-orbital line extends the whole length of the line, and 
is continuous with that of the lateral line. In this specimen 
