1922.] 



H. A. BaYlis and R. Daubney: Parasitic Nematodes. 



339 



oes.b-. 



The male measures 3-65-415 mm. in length and 0-4-0-5 mm. in thickness; the 

 female 6-0-6-5 mm. and 0-5-0-6 mm. respectively. In general shape (fig. 70) the 

 worms are rather short and stout. The 

 male has its blunt tail strongly curled 

 ventrally, while the posterior end of the 

 female is straight and conical. The 

 anterior end tapers more gradually than 

 the posterior. The cuticle is thin and 

 smooth, except in the region of the lateral 

 fields. These are very conspicuous, being 

 very broad and of a granular appearance, 

 and the cuticle covering them, especially 

 near the anterior and posterior ends, is 

 thrown into strongly -marked transverse 

 furrows. The width of the lateral fields 

 is about 01 mm. anteriorly, increasing 

 posteriorly to about 0-22 mm, Near the 

 tail they bend round towards the ventral 

 surface. The musculature is apparently 

 of the meromyarian type. The head is 

 somewhat abruptly truncate. The 

 mouth shows no recognizable lips or 

 papillae. The oesophagus is slender, 

 passing posteriorly into a relatively large, 

 glandular bulb of almost oblong shape. 

 The entire oesophagus, including the 



bulb, is 07-076 mm. long in the male, 0-8-0-9 mm. in the female. The bulb measures 

 about 0-35 mm. in length and 0-17 mm. in diameter. It is connected with the 

 intestine by a narrow neck containing some kind of valvular apparatus. The 

 intestine is apparently modified into a "fat-body" somewhat resembling that of the 

 Mermithidae. An anal aperture appears to be absent, the intestine terminating 

 blindly behind. The nerve- ring is situated at about 0-13 mm. from the anterior end. 

 No excretory pore has been seen. 



In the male, there are paired spicules and an accessory piece. The shape of the 

 spicules is highly characteristic, and is more readily conveyed by a figure (fig. 71) 

 than by description. Each spicule is broad at the base, and bent at right angles at 

 about its middle. In the males examined, the spicules were protruded as far as the 

 bend, and had their tips directed laterally, as shown in the figure. The tip of each 

 spicule is bifurcated, ending in two sharp points of slightly unequal length, separated 

 by a deep cleft. The spicules measure 0-18 mm. in length (following the bend). 

 The dorsal portion of the accessory piece is roughly triangular, broader behind than 

 in front, and appears to send down lateral processes at the sides of the spicules. No 

 caudal papillae have been made out. 



Fig. 70. — Scokcophilus lumbricicola. Female ; 

 lateral view. 



i., intestine ; oes.b., oesophageal bulb ; ov., ovary ; 

 r., rudiment of second uterus ; u., functional uterus ; 

 v., vulva. 



