230 
have not found it reasonable to establish for the present a new 
species on it. It has been collected at Charlottenlund, in the ,,Kalk- 
brænderihavn”" and at Lynæs among putrefying seaweed. 
Zeiss' Okularmikrom. A. Oc. 2. 
2 Length 292 — 4,7 mum. 
Qes. 26. 
Vulva 222. 
Tail 3. 
Width 4. 
Oncholaimus oxyuris n. sp. 
PETE fø 8, 9718, 185: 
, This form, so far as I can see new to science, has been col- 
lected on Hellerup Strandeng and later in Dragør, near the ,,Bade- 
hotel". It appears to be closely related to Oncholaimus viridis 
Bast. which it resembles in several respects, but it differs from this 
species in having the tail rather different. in form. — The head is 
truncate, with a circlet of 10 short, stout setæ. The length of the 
pharyngeal cavity is about twice its width and provided with the 
usual 3 teeth among which the ventral tooth is the larger. The 
porus excretorius is placed at a distance behind the bottom of the 
pharyngeal cavity equal to the length of the latter. The female organ 
is unsymmetrical like that in O. viridis and stretches forwards in the 
body; the uterus is rather spacious and is able to contain a con- 
siderable number of eggs, up to eleven. The vulva is not prominent 
as is the case in O. viridis. The tail is tapering considerably 
behind the anus and the tip of the former is constricted to a little 
finger-shaped appendage, curved towards the vent. The tail of the 
male differs somewhat from that of the female and is on the ven- 
tral side slightly spoon-shaped. The edge of this excavation is on 
both sides beset with a row of very strong and stout setæ. 
Between the spoonshaped excavation and the tip of the tail is 
placed a postanal, domical papilla which is possibly double. The 
