KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 63. N:0 2. 29 



by a few internal longitudinal vessels; the second fold is reduced to one single 

 vessel. On the interspaces between the folds there are no longitudinal vessels. The 

 distribution of the vessels is as follows: 



Dorsal lamina — 4 — 1 — 4—3 — endostyle. 



Transverse vessels of three orders are present. Numerous straight stigmata 

 are visible on the interspaces between the longitudinal vessels. (Cf. text-fig. 2.) 



The position and external structure of the alimentary canal is clearly shown 

 from fig. 24. The stomach is short and sharply marked off from the oesophagus 

 and from the intestine. It has about 18 longitudinal folds which issue from a rather 

 distinct raphe. It has a horizontal position. The osophagus is of remarkable length. 







Text fig. 1. Cnemidocarpa mollispina n. sp. Part of the Text-fig. 2. Cnemidocarpa mollispina n. sp. Part 



test ahowing the blood- vessels ; magnified. of the branchial sac. X32. 



The intestine forms a short rounded loop. The rectum is short and arises along a 

 sharp angle. The margin of the anus is lobed; about 8 small rounded lobes were 

 visible. 



The reproductive organs consist of 3 gonads on the left side and 5 on 

 the right. (Cf. Pl. 2, fig. 24.) They are elongated and straight; their openings are 

 directed towards the atrial aperture. The male glands are situated on the outer 

 side of the gonad; they are simple or of a lobed form. They communicate by the 

 tiny väsa efferentia, visible on either side of the gonad, with the common vas defe- 

 rens which accompanies the ovary and ends beside the opening of the oviduct. In 

 the individual at my disposal the ovary is well distended with eggs; the male glands 

 are rather reduced. From this fact one might conclude that the sexual products do 

 not attain maturity at the same titne. (Pl. 2, fig. 26.) 



Endocarps are present in the loop of the intestine and on the inner side of 

 the mantle. Those attached to the inner side of the mantle are only two in number, 

 one is in the vicinity of the atrial aperture, the other on the opposite side. (Pl 2, 

 fig. 24.) 



