10 Sigurd Johnsen. 
Gillslits restricted. Pseudobranchiae present. The gill-rakers 
on the first branchial arch are soft, moderately long and provided 
with very fine bristles, probably somewhat more numerous than 
shown in text-fig. 3, the bristles being very easily damaged during 
preparation. On the inside of this arch and on both sides of the 
following arches the gill-rakers have the form of soft tubercles 
of greater and lesser size, provided with stiff bristlelike teeth. 
(Text-fig. 4). The tubercles on the inside of one arch interdigitate 
with those on the outside of the following arch thus forming a sieve- 
like mechanism. A pharyngeal dention is present, consisting of 
very sharp but slender teeth, mostly slightly curved towards the 
pharynx. On three of the upper pharyngeal bones such teeth are 
developed, opposed to these are somewhat smaller teeth on the 
inferior pharyngeal bone (of the last arch). (Text-fig. 5). The 
bristle-like teeth on the gill-rakers are partly protruding in the 
cavity and are increasing in size towards the pharynx, here opposing 
a part of the upper pharyngeal teeth. 
The alimentary canal. The ventricle is large and 
furnished with several large and small conical papillae (Pl. II 
fig. 1); after fixation the largest are about 22 mm. in length with 
a base of 10 mm. in diameter. Then comes the duodenum, which 
is short, nearly smooth with only quite low branching ridges; in 
the passage to the small intestine, there are four pyloric caeca 
of the thickness of a finger, the one pair measures about 60, the 
other about 50 mm. The small intestine is unusually long, it 
measured about 7,5 m., in other words nine times the length of 
the body. The length of the abdominal cavity was about 350 mm., 
and as the body, as already mentioned, is greatiy compressed 
at the sides, the course of the intestine was very complicated, it 
lay wound up in various lengths, held together by network. It 
was of the same calibre all over. The intestinal ‘tufts’ are leaf- 
shaped, curled and about 5 mm. in height; in the greater part of 
the intestine they are joined together at the base, forming closely 
set longitudinal rows, separate tufts occurring only in the hinder 
part. The pyloric caeca are also furnished with leaf-shaped tufts. 
Food. In the ventricle, only a long piece (about 60 cm.) of 
grasswrack (Zostera marina) was found, it was withered (brown) 
and seemed to have been swallowed a part at a time, as it was bent 
in fairly regular lengths. In the duodenum there was also a smaller 
piece, and it the first part of the intestine there were a few small 
