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Nematodes in Sheep 
by Ransom and is shown in the accompanying figure (PI. XIX, fig. 2). 
The latero-ventral rays are somewhat thicker than the other rays. The 
stem of the dorsal ray measures 35-40 jx, its main branches 27-28 fx ; 
each of the latter bears a short inner branch close to its distal 
extremity, whilst a shghtly longer branch is given off more proxi- 
mally, this outer branch projects backwards, not forwards, as in the 
specimen figured by Ransom (1911). 
Fig. ]. Ostertagia trifurcata Ransom. Male and female, x 15. 
Fig. 2. Cooperia oncophora Railliet. Posterior end of body of male, viewed from right 
side. X100. 
The two spicules are approximately equal in size, measuring 150 jx 
in length in the smaller individual, 160 fx in the larger; each spicule 
is divided into three processes posteriorly, the principal one long, 
thick and truncated distally, the other two shorter and terminating 
in fine points. 
The gubernacula measure 62 jx and 65 p, in length, they are broadest 
in the middle and taper towards both extremities ; in one specimen 
