284 



Mr. H. A. Baylis on some 



This form is very closely related to Ascaridia \_Heterakis] 

 Jongecirrata (v. Linstow, 1879 "*), the host of which was also 

 a dove, Geojjelia sp. v. Linstow's very brief description, 

 however, mentions only nine pairs of caudal papillae in the 

 male, whereas the present form shows thirteen pairs (see 

 below). The relative length of the oesophagus is also less 

 than in v. Linstow's species. 



The male measures up to 43 mm. in length and 1 mm. in 

 thickness, the female up to 74 mm. and 1*9 mm. respectively. 

 The anterior end is usually curled towards the dorsal side. 



Fig. 2. 



Fiff. 1 



Ascaridia faseiata, 



Fjg. 1.— Head of male; dorsal view, a, cervical ala. 

 Fig. 2.— Portion of cuticle in optical longitudinal section, showing the 

 annular thickenings. 



The tail is straight, and tapers to a fine point in both sexes. 

 r l here are three large lips of semicircular outline, the dorsal 

 lip (fig. 1) bearing two large papilla, the ventrolateral lips 

 each a single median papilla. The diameter of the head is 

 0-3-0-48 mm. The cuticle is marked with thickened trans- 

 verse rings (fig. 2), which can hardly be called striations 

 (c/. v. Linstow's account of H. longecirrata). In the middle 



* Arch. f. Naturg. p. 175, pi. xi. fig. 23. 



