Eiirfopardsifffi from C'lilrkevx. 247 



head, sides or tail. The tail is truncated obliquely, and has ii 

 nmcronate tip. It carries, so far as these specimens show, onlv 

 3 pairs of post-anal pa])illae. There are two spicules, short, 

 and not quite equal. The preanal sucker has a strongly de- 

 veloped cliitinous ring. 



In some points it appears most closely allied to Heterakis 

 maculosa of the pigeon and pheasant, but it is smaller, appa^ 

 rently has fewer anal papillae, and has no lateral wings at the 

 anterior end. 



The imperfectness of the present material, which I have not 

 been able so far to augment, precludes me from giving a fuller 

 account of this form. H. maculosa itself has not, so far as I am 

 aware, been recorded from the fowl. 



Tricliosoitia retusuni, Raill., 1893. 



This form was only found in one case, fairly numerous, in the 

 small intestine of an apparently perfect bird. 



The specimens are normal except that the female may reach 

 a length of 30 mm. (as against 19 nnii.), and the eggs are 45 to 

 65 fji long by 18 to 24 //. wide (as against 50-55 fj. long by 30 to 

 32 fx wide). 



This genus has not, so far, been recorded from the fowl in 

 Australia. My specimens are from the neighbourhood of Mel- 

 bourne. 



Oryspirura parvnvinn (sp.n.). (Pis. XXXTH.-XXXV., 

 Figs. 14-21). 



The 16 specimens on which this description is based were sent 

 to me from Rockhampton, Queensland, by Dr. S. Dodd. to whom 

 I am also indebted for the accompanying note on their manner 

 of occurrence and effect on the host. 



Description. The body tapers gradually to each end, the 

 anterior end being bluntly rounded, the tail tapering more 

 sharply. Tiie outer la3'er of the cuticle has very fine transverse 

 striations, and occasionally faint longitudinal ones also, which 

 are finer than those due to the polymyarian structure of the 

 muscle-layer. 



Sometimes, as in four out of seven specimens, the male has 

 swollen cuticular '' wings " anteriorly on either side of the head 



