I50 
The Irish Naturalisi 
August, 
Dorylaimus longicaudatus Biitschli. — Only one male 
specimen of this species was found. This is a comparatively 
large worm, being very much longer than any of the others. 
The female is about 3-3 mm. long, and the male 2-8 mm., 
but very slender, its breadth being about 1/30 to 1/35 of 
its length. The specimen was 2-8 mm. long ; the mouth 
has a very stout rather blunt dart which is slightly pro- 
truded, and on the gullet there are thickenings in the wall 
which appear like two little bars crossing it. The head 
end also bears a few papills (fig. 11). The male has two 
stout spicules (fig. 12), and the tail is very long and slender. 
li 
Fig. 0, Monohystera hulbijera, oesophageal bulb 
head (after De Man). Magnified. 
fig. 7, tail ; fig. 8, 
Rhahdites aspera Biitschli. — This species was found in 
large numbers in some of the bulbs. It is about i mm. 
long ; the male has two stout spicules and a large ribbed 
bursa (see hg. 10) ; the tail is short and very slender. It 
is distinguished from another species, Rhahditis longicau- 
dahis, which closely resembles it, by the thickenings in 
the wall ot the gullet, and the shape of the spicules and 
bursa ; R. longicaudatus has also a much longer and thicker 
tail. 
Royal College oi Science, Dublin. 
References. 
O. BiJTSCHLT, Vcrhandl, Leap Carol Akademic, xxxvii, 1S73. 
J. G. De Man, Die Nematoden der niederlandischen, Fauna, Leiden, 
1884. 
