KUNGL, SV. VET. AKADEMIENS HANDLINGAR. BAND 39. N:O l. 53 
traction. The tentacles (Figs. 202, 203) are almost like those in Ph. Sabellarix. The 
retractor-museles varies greatly in length (Figs. 177—182) and their length of junction 
is also highly variable. In some specimens their free separate parts are long, in 
others they are very short. With regard to the insertion of them in the body-wall, 
there also exist great individual variations. In one specimen the retractors run out 
from the middle of the trunk, in a second from its anterior part, in a third from 
its posterior part, ete. On the whole I have found that the post-anal portions of the 
retractors amount to from 17 to 95 "/, of the trunk itself. 
No single specimen examined by me, was provided with ova within the body- 
cavity. It is not wunlikely, though by no means proved, that the two forms, Ph. 
Sabellarie and improvisum, represent different sexes of the some species. 
Phascolosoma Sarsii (IKOREN and DANIELSSEN 1875 and 1877). 
Pl. V. Fig. 59. 
Phascolosoma levissimum M. SARS 1868 (no description) (partim). 
Onchnesoma Sarsiv KOREN and DANIELSSEN 1875 and 1877 (partim). 
Habitat: 
Coast of Norway: Skraaven in Lofoten, 200 to 300 fms., elay (Mus. B-). 
I am indebted to Dr APPELLÖF for having given me the opportunity of exa- 
mining a type-specimen from Skraaven. An examination of the description of KOREN 
and DANIELSSEN reveals such inconsistencies, that a re-investigation of their types is 
highly desirable. Their Fig. 40, Pl. XV must be incorrect in more than one respect. 
Thus, for instance, there are in fact two segmental organs present and, under the 
supposition that the animal is normal, the retractors (according to the Norwegian 
investigators only a single one) are never attached with their roots in the manner 
drawn by them. Besides, how are we to explain what they mean, when they tell 
us on the one hand that: "The body claviform, 8 mm. long. The proboscis about 
2 mm. long. ..", and, on the other hand, in the specific characteristics: "The body 
3 mm. long, claviform ... The proboscis a little longer than the body..." Moreover, 
their Fig. 37 shows that the proboscis is more than twice the length of the trunk 
itself. These statements involve a contradiction. ' 
In fact, it may probably be the case that two varieties, or rather species, have 
been confounded by them and by SARS, one having served as the type described in 
the text and the other having been the one diagnosed and figured. For it is not 
plausible that two forms, so very different with regard to the proportions between 
the proboscis and the trunk, can be identical. I am strengthened in this supposition 
by the fact, that the specimen from Skraaven, at my disposal, in size and general 
shape resembles that described by KoREN and DANIELSSEN in their text — apart, of 
course, from all regard to their inaccurate statements — while those I have seen 
from Christiania Fjord agree more closely with their diagnoses and figures, 
