A new Styelid Tunicate from Norway. 5 
visible. Transverse vessels of different size cross the branchial 
sac. Here and there the stigmata are crossed by slender vessels. 
The position and external structure of the alimentary 
canal is clearly shown from fig. 3. In examining it, 
one is struck by the development and arrangement of the 
intestine, which is of great length and characteristically bent, 
forming a rounded, wide loop above the stomach. It is 
distinctly marked off from the stomach (Pl. 1, fig. 3). Oesophagus 
is rather long, projecting from the base of the branchial sac. 
The stomach is short, with about 22 longitudinal folds 
in its wall. Only a very. small rudiment of a pyloric coecum 
is present. 
The condition of the rectum is especially noticeable, as 
appears from fig. 3 it is long and sinuous and placed close 
to and on the inner side of the descending part of the loop 
of the intestine. The margine of the anus has at least 12 
small lobes. 
The reproductive organs consist of two gonads on 
the right side and one gonad on the left. Each gonad consists 
of an ovary, bordered proximally by clusters of male glands. 
The ovaries are tubes of great length which are bent along a 
sharp angle and sinuously curved, containing masses of eggs. 
The oviducts are wide, almost inflated, with lobated orifices, 
directed towards the atrial aperture. (Cf. Pl. 1, fig. 4). The two 
ovaries oi the right side differ in size, the one being somewhat 
shorter and narrower than the other. In other respects they exactly 
agree. The ovary of the left side is in its proximal part less 
sinuous than those of the right side. Moreover they are of 
exactly the same structure and the characteristic bend along 
a sharp angle is common to the ovaries of both sides (Pl. 1, 
fig. 5). | 
The want of symmetry is manifested not only in the 
arrangement of the ovaries but also in that of the male organs 
If we compare figs. 4 and 5 it will be seen. that the testis’ 
on the left side is much more developed than the corresponding 
organ on the right. On the latter side, the clusters of male 
glands are few and are placed only at the proximal end of 
the oviduct, whereas on the left side they are numerous, 
forming a series of testicular masses, grouped along the ovary 
at one side and bordering the greater part of its length. The 
