58 
there are seen some chitinous thickenings which seem to have 
their place in the outer layer of the æsophagus itself (fig. —), a 
feature rather strange and, as far as I am aware, hitherto unique 
among freeliving Nematodes. The æsophagus, rather thin in its 
distal part, increases evenly towards its base, where it is some- 
what expanded without forming a true bulb. The nerve ring is of 
considerable size and situated at about the middle of the æso¬ 
phagus. 
Ventral giand present. Excretory duet opens on the ventral lip 
cephalad to the sefæ, by means of a very long chitinous tube is- 
suing from a rather large ampulla. Female organ unsymmetrical; 
the vulva is situated a considerable distance behind the middle. 
Spicules rather straight. There are no accessory pieces, no supple- 
mentary organ, no masculine papillæ. 
Kvampia aevopova n. sp. 
PI. II, figs. i, 2, 5. 
Three specimens are present, one male, the length of which 
makes 3,o mm, one mature female at a length of 3,2 mm, the 
uterus of which contains eight shell-eggs, and a young specimen, 
not sexually differentiated and only measuring 1,8 mm. 
The shape is siender, almost filiform and only slightly tapering 
towards the ends. The greater part of the body is of about equal 
width. The front end tapers slightly from about the base of the 
æsophagus till the base of the buccal cavity; from here it tapers 
more quickly so that the head appears somewhat constricted. The 
front-end is truncate and provided with four, presumably movable 
lips, distally rounded and somewhat swollen. In the hind-part the 
body keeps its width until caudad to the vulva whence it tapers 
slightly towards the anal aperture. The tail is short, conical in 
both sexes, and ventrally curved. 
The cuticle is smooth; even with immersion lens (Zeiss Apochr. 
2 mm) I have not been able to perceive the slightest trace of 
striæ. On the head is found a crown of eight rather stout setæ, 
situated two on each of the four lips. Moreover rather fine and 
scanty hairs are found spread over the foremost part of the body, 
especially in the æsophageal region. No lateral organ is observed. 
The buccal cavity is rather spacious and regularly funnel- 
