250 Gcorci'ma S^veet : 



from the tip of the tail, again less than in 0. inansoni. The 

 uterus and ovary are double, the vagina formed by the union 

 of the two uteri, is about 2.64 mm. long (i.e., more than in 

 0. iN/nisoni), but in the middle-third of its length it is generally 

 swollen out into a thinner-walled portion in which 10 or more 

 eggs may lie in one transverse plane (see va.. Fig. 20). The 

 posterior end of this swelling is never more than .66 mm. from 

 the vulva, and never more than one egg is found at any point 

 along this terminal portion. This vaginal swelling does not 

 appear to be present in 0. mansoni. The eggs, too, are smaller 

 than in that species, being 33 to 4:5 ji. long by 25 to 30 ft. wide, 

 and often retain their square-ended appearance until ready to 

 be laid. Those in the vagina contain fully-formed embryos 

 (Fig. 21). It will be seen from the above that though this 

 species is closely allied to 0. majisoni, yet it is a distinct form 

 from the latter. A careful comparison of the two sets of 

 measurements will show that while in some cases the range of 

 extremes overlaps, though it is never the same (e.g., the length 

 of the pharynx, the length of the male and female, posi- 

 tion of the anus in the female), yet in other "features the 

 differences are distinct, as seen in the presence of the 

 cuticular cephalic wings on the male, the shorter oesophagus, the 

 thinner bodies of both uuile and female, the more posterior posi- 

 tion of the cloacal opening in the nuile, the fewer anal papillae, 

 the greater length and thickness of the long spicule, and in 

 general less length of the short spicule, the usually more posterior 

 positio'U of the anus and vulva, the longer vagina, and the nuich 

 smaller eggs. 



Dr. Dodd writes as follows: — " ' Worm in the eye ' in poultry 

 has been known to poultry-keepers in North Queensland for 

 some years. My attention was called to the heavy mortality 

 resulting from this affection early in 1908, but no opportunity 

 for investigating it occurred until late in that year. Then a 

 live fowl was sent from Rockhampton for the purpose of obser- 

 vations in connection with a disease (subsequently ascertained 

 to be Spirochaetosis) which was then causing heavy losses. 

 The bird in question was quite lively, but was affected with 

 marked conjunctivitis, accompanied by slight swelling over the 



