246 
a pond near Lønne at Nørre Nebel and in the extensive bogs 
between Hulsig and Kandestederne. 
Dorylaimus acuticauda de Man. 
1884. De Man, p. 179. T. XXX. fig. 124. 
Several specimens were collected, both sexes, in Nymindegab 
opposite to the mouth of the Ringkøbing Fjord. A little strand- 
meadow is found here at the foot of the dunes covered with grass 
and Arraeria. On the roots of these plants it was found. The 
Danish specimens appear to be a little larger than those described 
by de Man. 
Zeiss O ku 1 ar mi k rom. A. O c. 2. 
Length 145 = 2,3 mm. 
Oes. 33. . - '] 
Vulva 71. 
Tail 5. 
Width 4. 
De Mans formula gives: a = 36, /9 == 4^2, = 29. 
De Man indicates: a = 23—25, ft — 4, y — 30—35. 
Dorylaimus tenuis n. sp. 
PI. V. figs. 39, 40, 42, 43, 46. 
A very singular form belonging to this genus has been col¬ 
lected in Lyngby Sø. It occurs in mud on the roots of Stratiotes 
aloides. Several specimens were taken in the raonth of August 
both mature males and females, but none of the females contained 
shell-eggs in the uterus. Evidently the eggs had been newly laid as 
proved by the distension of the uterus (fig. 43). The shape of the 
animal is exceedingly thin, having almost the same width from head 
to tail. Only the front-end tapers rather quickly. The head 
s rounded, devoid of lips. Just behind the mouth occurs a, ring¬ 
shaped thickening of the chitin-intima in which the spear moves. 
This is of the well-known usual shape and rather stroug. The 
chitin-intima of the oesophagus is rather conspicuous. The distal 
