ULAKIA. 189 



are closer, lower and less pronounced than in tlie latter. 

 Besides this transverse striae are present. The diameter 

 of the female body in most of the segments examined was 

 about the same in each case namely from 180 to 400/*, more 

 usually approximating the latter figure. We are able then 

 to record the finding of at least two species of Onchocerca 

 in Australia, viz., O. gibsoni in cattle and O. fasciata in 

 camels. 



During the past few days we have received the "Annual 

 Report of the Veterinary Officer investigating Camel 

 Diseases!, for the year ending 31 March, 1910," by A. S. 

 Leese, who on page 13 mentions the finding of O. fasciata 

 fairly commonly, coiled up in nodules in the subcutaneous 

 tissues. He goes on to say that t he parasite does not cause 

 any perceptible harm to its host. We might add that the 

 first reference to the presence of this nematode (at that 

 time unidentified) appears to have been made in 1909 by 

 one of us, who found them in 1907 in dromedaries recently 

 imported into West Australia from India (Cleland, Bull. 34, 

 Dept. Agric, West Austr., 1909, p. 8). 

 Explanation of Plate. 

 Onchocerca gibsoni, Cleland and Johnston. 



Fig. 1. Anterior end of female. 



Fig. 2. Portion of body of female, shewing pattern on cuticle. A 



few longitudinal strise are also represented. 

 Fig. 3. Posterior end of male. 

 Fig. 4. Embryo in shell (drawn from a smear preparation). 



All the above sketches were made with the aid of a camera 

 lucida. Nos. 1 and 2 are equally magnified. 



References to lettering:— b.w„ body wall (dermis and muscle); 

 a, anus; a.e., anus of embryo; en., cuticle; en r., cutieular rid^.s; 

 etnb. sh., embryonal shell; int., intestine; l.str., longitudinal stria 1 ; 

 m., mouth; m.m., muscles attached to spicule; n.r., nerve ring; 

 n.r.e., nerve ring of embryo; o e., oesophagus of embryo; oes., 

 oesophagus; p lf caudal papilla? p»p 9 , post-anal papillae; p 4 four 

 peri-anal papillae; r.e., rings on cuticle of embryo; sp. ,,*•/>. „ 

 (dotted) spicules of male; nt., uterus (main trunk); ut. lt ut. it 

 uterine branches; »., vulva; vg., vagina. 



