237 
Zeiss O kul ar mikro m. A. O c. 2. 
Length 76. 
Oes. 13. 
Tail 9. 
Width l l /a. 
Diplogaster longicaudit Claus. 
Claus, 1. c. p. 354. 
This species I have found in putrefying fungi in the Kilde - 
skov together witli a short-tailed form of the same genus which I 
did not succeed in determining to species. 
Diplo gaster gracilis Biitschli. 
1876. Btitschli, p. 373. T. XXIII. fig. a—c. 
Ålso this species were collected in the Kildeskov in putrefving 
fungi. It agrees with the D. longicciuda in having the tail tapering 
very much posteriorly and terminating in a long pointed extremity. 
It is easily known by its female organ being unsymmetrical, with 
the vulva placed a little before the anus. The male has an i neon- 
spieuously developed bursa and two long siender spicules, with a 
scarcely visible accessory piece. 
Cephalobus elongatus de Man. 
1884. De Man, p. 96. T. XIV. fig. 57. 
1906. Ivati Marcinowski, p. 215. 
Only two species were found of the genus Cephalobus. C. elon¬ 
gatus was collected in the Kildeskov in a putrefying stub. It appears 
to me beyond doubt that it occurs liere as a veritable Nematode of 
putrefaction; I kept it for weeks in a little glass filled with the 
putrefying wood-mass in which the animals propagated lively. De 
Man indicates that the species „bewohnt nicht nur die feuchte, 
oder von stissem oder brackischem Wasser getrankte Erde der 
Wiesen und Marschgrunde, sondern auch den sandigen Dlinenboden 
an den Wurzeln der dort wachsendeu Pflanzen“. After later 
