KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 39. N:o l. 95 
places on the body. Thus, for instance, in one and the same individual transverse 
crinkles of the skin prevail in the anterior part of the trunk, while in its middle the 
skin presents small areas formed by crinkles crossing one another at about right 
angles. On the other hand, the hind portion of the trunk exhibits a series of lon- 
gitudinal wrinkles, which converge towards the posterior extremity, but decrease and 
disappear towards the middle of the trunk. These wrinkles (Figs. 151—152), to a 
number of from 20 to 30, seem to be fairly constant and become manifest to the 
eye by the possession of prominent, granular, papilla-like bodies or scales of an ir- 
regular form and of unequal size. The bodies in question are sometimes of a darker 
or lighter rusty colour, but for the most part they are colourless. Such bodies do 
not represent true papille. They are to be found all over the surface of the body, 
though of considerably smaller size (Figs. 170—172), and on the anterior part of the 
proboscis they present themselves as exceedingly minute, erowded heaps or knobs of 
darkly stained granules, more or less distinetly arranged in longitudinal rows (Figs. 
165—169). — Scattered among these bodies are seen small true papille communi- 
cating with the glands. 
It ought, furthermore, to be mentioned that often at any rate, if not normally, 
circular constriections or folds occur at more or less regular intervals round the pro- 
boscis (Fig. 159 x). These folds present a somewhat dark colour (Figs. 168—169 x), and 
sometimes I thought I detected there a circular bundle of fibrils. 
The tentacular crown is reduced to an oval disk, devoid of all traces of pro- 
trusions (Fig. 161—164); a small under portion probably represents the lower lip. 
Im vain I have searched for the presence of a contractile vessel. There is only a 
single retractor-musele originating at the hindmost end of the body (Fig. 185). In 
the specimen drawn the single segmental organ (Fig. 185) is situated to the right of 
the nerve-cord and fixed to the body-wall throughout its whole length by numerous 
threads (Fig. 160). 
The intestinal tube (Fig. 185) forms a number of twists, and is not fixed to 
the posterior end of the body by a spindle-muscle. With regard to the site of the 
anus, KOREN and DANIELSSEN state: "which [cireumvolutions of the intestine] finally 
go over into a long nearly straight rectum, which has its aperture on the proboscis 
a little above its base. In 1892 SHIPLEY' writes: "There is a marked thickening 
of the skin where the introvert joins the body; the anus is situated a little anterior 
to this. The external opening of the kidney is a little behind, just to the side of 
the ventral nerve-cord". On his plate SHreLeEyY has, moreover, given a reproduction 
from KOREN and DANIELSSEN to show the arrangement of the internal organs. Now, 
the fact is that the figure of the Norwegian investigators is wrong with regard to 
the site of the anus; their statements too, as well as those of SHIPLEY, are incorrect. 
The truth is that the anal aperture is removed far away from its ordinary place to 
the neighbourhood of the mouth, where it opens on a dorsal papilla (Figs. 162—163 
and 165). Thus, the rectum runs forwards through the whole proboscis. This is a 
t On Onchnesoma Steenstrupii, — Quart, Journ, Micr, Science 1892, 
