Norwegian Solenogastres. 47 
in the lateral parts of the gonads and seem to mature sooner 
than the eggs; the pericardium contained only spermatids 
in masses, which were attached at the sides of the heart; none 
were, however, formed here, as no spermatogenous cells are found 
in the pericardium. Thus, in conformity with THIELE, I am inclined 
to doubt the statement made by Pruvor (1891, p. 749) on this 
subject. Whether these spermatids, which all had their heads 
directed forwards and their tails backwards, were derived from 
the actual individuum or had immigrated from another after 
copulation, is doubtful. No mature spermatids were observed in 
the hind parts of the gonads of the specimen in question, but 
they were filled with eggs, one of which was just about to pass 
into the efferent duct. The latter is unpaired and rather long, 
lined with a low ciliated epithelium, and debouches into the under 
wall of the pericardium, which projects slightly in front of its 
openings, beneath the ventricle (fig. 71). 
The coelomoducts (fig. 71) are quite typical. They issue from 
the hind part of the pericardium. The narrow proximal canals 
are rather short and run straight forward and downward. They 
widen, as described by THIELE, into a pair of rounded vesiculae 
directed forwards and lined with an epithelium consisting of mucous 
cells emptying their content into the lumen. Though these ceils 
have no marked bluish stains but resemble the somatic cells in 
general, it may be assumed that these portions are the homologa 
to the paired portions lined with cyanophilous epithelium which 
are present in the distal legs of other Solenogastres, though in the 
present species they are otherwise differentiated in structure and 
position and lack vesiculae seminales. 
In a transverse section through the body one observes, as 
already mentioned, that the intestine occupies a median position 
and does not reach far ventrally. On its under side runs a large 
blood vessel separated from the intestine by a septum of horizontal 
muscles, which lie close to the intestinal wall. Only at the front 
end do they separate from the intestine and are lodged beneath 
the salivary glands, which are surrounded by a large blood lacuna. 
Open communications exist between the lateral angles of the 
sinus and the lacunae in the surrounding connective tissue. 
The sides of the sinus are constituted by the transversal muscles 
which extend therefrom upwards to about the lower third of the 
body, where they join the superficial musculature. At the insertion 
