— as in all here described Thoracostomes — a considerable dis¬ 
tance behind the middle of the body. In a female of a length of 
12,3 mm its place is 8,s mm caudad to the front end. Vaginal 
giands are rather large. This species does not seem to be so pro- 
lific as the above described species, only six shell-eggs being found 
in one female. The egg is here considerably larger than in T. 
papillosum. The hind-part of the body of the male is bent in- 
ward just as in the two species described above. The supplement- 
ary organ is situated about 65 p cephalad to the genital aperture. 
Subventrally on each side a longitudinal fold is found. On each 
of these „bursal folds“ — as I will name them — a row of strong 
setæ is situated (PI. II, fig. 10). These „bursal setæ“ are conical and 
very acute and found in a number of 15 —16 on each side. The 
bursal folds which reach from immediately cephalad to the ano- 
genital aperture have a length of about 320 p. Cephalad to these 
folds two bursal papillæ are seen on each side. 
The spicules are much like those of the other species described 
in this paper. They are slightly curved, of considerable width and 
have thickening-lists in the middle. The accessory piece is V-shaped; 
seen in profile there are two apophyses, one pointing forwards and 
the other pointing backwards; close by the distal tip is seen an 
outgrowth of nearly globular shape with its surface rather coarsely 
rifled (fig. 21). 
Thoracostoma elegans n. sp. 
A quite young specimen of a Thoracostoma, originating from 
the Campbell Island, has proved to be specifically identic with a 
species of which a rather great material has been taken by the 
investigation steamer „Thor“ in the Skagerrack. This species will 
be described together with the material of the Ingolf Expedition 
under the name of T. elegans n. sp. 
Besides the species dealt with on the foregoing pages there 
were present in the material from the Auckland Islands some spec- 
imens, not suitable for a doser investigation; they proved to belong 
to the following genera: Cyatholaimus , Enoplolaimus and Linhomoeus. 
