NEMATODE GENUS PHYSALOPTERA. 



1057 



largest female, is 1*7 mm. long by 100 /x thick, and the egg- 

 chamber 800 /x long by 270 yn, broad at the origin of the uteri. 

 The receptacula seminis are pear-shaped, and are sharply 

 constricted off from the oviducts, their union with the uteri 

 being gradual ; they are 380 /x long by 200 /x broad at their 

 oviducal end. 



The eggs are oval and thick-shelled, and average 43 /x long by 

 27 jx thick. They contain a fully-developed embryo when ia,id. 



Male. 



The males vary in length from 26 to 31 mm., and are 

 attenuated in their anterior two-thirds ; they vary in thickness 

 from 1 to 1'2 mm. 



The bursa is narrow and elongate and rounded at its tip ; its 

 anterior part may or may not be covered over by a posterior 



Text-fioure 30. 



Fltysaloptera tumefaciens Henry & Blanc. 

 Caudal extremity of male. 



reflection of the cuticle. Its central ventral area is ornamented 

 with irregular tubercles arranged longitudinally ; laterally in the 

 cloacal region these tubercles are replaced by longitudinal ridges. 



The four stalked papillse are short and arranged equidistant 

 from each other round the cloaca. The three pre-anal ventrai 

 papillas are situated in a row just antei'ior to the anus ; the central 

 papilla is large. There are five pairs of post-anal ventral papillae, 

 of which the first two pairs are small and situated close together, 

 one behind the other, immediately posterior to the anus. 

 Papilla 3 are situated at the anterior quarter of the tail, and 

 papillae 4 half-way between them and the middle of the tail. 

 Papillse 5 are slightly approximated to the mid-line, and are 

 situated slightly behind the middle of the tail. 



The spicules are bent, thick, short, and slightly unequal. 



