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CHLAMYDOSELACHUS ANGUINEUS. 13 
The construction of the teeth in our specimen was moreover in 
entire conformity with those of the typical specimen; and the teeth 
of the young specimen from Madeira, whose total length was only 
one third of that of the individual from Varanger Fjord, did not 
present any variation of importance. The number of teeth in each 
of its rows was 5; the two Atlantic individuals agree, on the whole, 
in all detailed respects with the specimen from Japan. 
Lateral line. As in the type specimen, the lateral line has a 
depression just under the dorsal fin, and for the remainder of its 
course (along the tail), lies below the central line of the body. In 
the present individual this depression is on one side (the left) irregular, 
it having, on its (otherwise normal) lowered portion, a little sharp 
curve upwards. 
The two approximated ridges, separated by a groove, described 
in the typical specimen as extending under the middle of the body, 
were indistinct in this specimen. It is possible that the liver becomes 
enlarged or diminished periodically, and may, occasionally, when it 
(as in the Norwegian individual) is very great, obliterate the two 
ridges and the intermediate groove. 
The scales. I shall add the following notice to the descriptions 
given by Garman and Rose. The scales, especially on that portion 
above the lateral line, are turned slightly but perceptibly backwards, 
and therefore offer some slight opposition to the finger when drawn 
over them in a forward direction. This is less observable below the 
lateral line. 
Along the dorsal line of the body (from the neck of the dorsal 
fin), the scales are somewhat larger than those on the other parts of 
the body (excepting the tail’s), and the two keels which, on each scale, 
unite at an angle on the hindermost edge of the scale, are, in this 
specimen, more raised, especially at the point of the angle. On the 
whole they resemble the scales on the angles of the mouth, but are smaller. 
The intestinal canal is almost straight throughout its entire length, 
only the short duodenum being turned aside between the pylorus 
and the dilated portion with the spiral valve. 
The stomach proper is small, and proportionally narrow; its length 
is 340 mm., breadth about 45 mm. 
The intestine (colon) is cylindrical, very muscular, and contains 
47 spiral valves, 
