H. A. Baylis 
413 
1. Ophidascaris filaria (Dujardin, 1845). 
Ascaris filaria Dujardin (1845), pp. 177, G53. 
„ ,, Stossich (1896), p. 79. 
„ „ Railliet and Henry (1910). 
„ rubicunda, <J, Schneider (1866), p. 42; Text-fig.; PI. I, fig. 8. 
„ ,, Stossich (1895), p. 35; PL VI, figs. 30, 31, 35. 
» „ „ (1896), p. 35. 
? „ infundibulicola v. Linstow (1903), p. 108; PI. V, figs. 1-2. 
Length, male, up to 110 mm.; female up to 170 mm. Thickness, male, 
1 mm.; female, 1-5mm. Cuticular striations about 3 /x apart. Body cylindrical, 
greatly elongate, a little more tapering in front than behind. Lips (fig. 1) each 
bearing two papillae externally; the papillae of the dorsal lip with double 
terminations; ventro-lateral lips each with a large papilla towards the ventral 
and a smaller papilla towards the dorsal side. Dorsal lip with slightly emarginate 
Fig. 1. Ophidascaris filaria. The head; dorsal view. 
anterior border and rounded free angles. Free end of each lobe of pulp multi- 
radiate, with an antler-like lobule directed laterally and posteriorly. Interlabia 
short, bluntly conical. Well-developed grooves at bases of lips. Marginal 
dentigerous ridges present. Oesophagus 5-7 mm. long, somewhat swollen 
posteriorly. Excretory pore at about 1-4 mm. from the anterior end. Tail of 
male bluntly conical. Spicules slightly unequal, rounded at the tip, measuring 
about 4-4*8 mm. in length. Width of spicules, including shaft and alae, 
0*06-0*07 mm. Postanal caudal papillae six pairs, of which pairs 1-5 form an 
almost circular group on either side near the tip of the tail, the sixth pair being 
situated a little behind the cloaca, and having double terminations. Tail of 
female bluntly conical, about 0*3 mm. long. Vulva situated considerably 
behind middle of body, dividing the total length in the proportion of about 
27-2 
