46 ASCAROIDEA 



fringes. Neck ornamented with fringed " epaulettes," and 

 behind these two pairs of lateral bifurcated lappets. Mouth 

 a vertical (?) slit, bordered with fringes. Apparently eight 

 setiform cephalic papillae and two circular lateral organs 

 present. Oesophagus preceded by a tubular pharynx, and 

 followed by a pyriform muscular bulb. Male undescribed. 

 Tail of female tapering. Vulva near anus. Uterine branches 

 parallel. Ovaries reflexed. Eggs segmenting when laid. 



Hab. Intestine of a Myriopod {Julus). (One species known). 

 Genotype : H. juli Cobb, 1898. 



Cobb, 1898, Agric. Gaz. N.S.W., Sydney, ix, 299. 



The only description available is contained in Cobb's fig. 10, 

 ■udth its legend and formula. According to the legend, the 

 organs which we have called lateral organs in our diagnosis 

 are " two dorso-ventral markings." This would imply that 

 the mouth is a horizontal slit, and not a vertical one as we 

 have stated. On the other hand, the paired cervical organs 

 which we have called lappets are termed by Cobb " dorso- 

 ventral fins," but are figured (figs. II and IV) as being lateral 

 in position. 



Appendix to Rhabditinae. 



The following two genera should probably be regarded as 

 Rhabditinae greatly modified in consequence of their highly- 

 specialised habits. 



19. AUantonema Leuckart, 1884. 



Syn. Bradynema zur Strassen, 1892; Tylenchomorphus 

 Fuchs, 1914; Howardula Cohh, 1921. 



Parasitic form (female), when fully grown, more or less 

 sausage-shaped, without mouth, anus or alimentary canal. 

 Genital tube single, the uterus greatly swollen and filling almost 

 the whole body-cavity. Vulva at or near the posterior end 

 of the body. Ovary long, doubly reflexed. Viviparous, 

 numerous embryos escaping into the body-cavity of the host, 

 and fuially to the exterior. 



Free-living form (bisexual) of t3rpical Nematode shape. 

 Head truncate, with very small lips. Oesophagus with a 

 muscular anterior portion ending in a bulb, followed by a club- 

 shaped glandular portion. A short, three-sided buccal cap- 

 sule present. Tail conical in both sexes. In the male, the 

 tail ends in a small spike, has narrow alae, and may carry 

 two pairs of small preanal papillae. Spicules paired, short 

 and slender. A very small accessory piece present. Vulva 

 slightly behind the middle of the body. Female genital tubes 

 paired, opposed, reflexed. Oviparous. Eggs few, segmenting 

 when laid. 



