1044 BIR. R. J, ORTLEPP OK THE 



Feviale. 



The females are generally large, and vary in length from 15 to 

 48 mm. with a maximum thickness of 1 to 1"7 mm. in their 

 posterior half. 



The vulva opens a short distance in front of the middle of the 

 body. It is non-protuberant, and its position divides the body 

 into the ratio of 1 : 1'4 to 1 : 1"1. It leads into a thick- walled, 

 straight or bent vagina 1'6 mm. long by 114 /x thick in a female 

 20 mm. long ; its posterior part gradually passes into the egg- 

 chamber, which broadens out posteriorly so as to assume a more 

 or less pyriform shape : in the same female it was 820 [j, long by 

 228 IX thick at its posterior end. Two uteri take their origin 

 from the posterior margin of the egg-chamber, a trunk portion 

 being entirely unrepresented. The mode of origin of the uteri is 

 very characteristic, and differs from all those already described ; 

 they arise from the posterior lateral margins of the egg-chamber, 

 and not from its base. It thus happens that the uteri, 

 although arising at the same level, are yet far removed from 

 each other. 



In most individuals a dark and detachable chitinous ring 

 surrounds the body in the region of the vulva. 



The tail is conical and rounded at its tip, and forms from 

 l/53rd to l/66th part of the bodjr-length. Its caudal pores open 

 in its posterior half, and their position divides the tail into the 

 ratio of 3 : 1. 



The eggs are oval and thick-shelleci, and contain a fully- 

 developed embryo ; they average 49 /x, long by 35 [x in diameter. 



Male. 



The length of the males varies from 13 to 40 mm. by '7 to 

 1*3 mm. thick in their posterior third. 



The tail is elongate, and is often closely reflexed on to the 

 ventral surface. Its median ventral surface is ornamented with 

 conspicuous and rounded tubercles arranged longitudinally ; 

 toward the lateral margins of the tail and on to the alse 

 these tubercles become gradually i-eplaced by loiigitudina! ridges, 

 each having a few relatively far removed brea.ks along its 

 course. 



The caudal region, within the cuticular reduplication, appears 

 pointed; this is due to the fact that the caudal alse, although 

 present, do not open out laterally, but remain irregulai'ly folded 

 towards the ventral surface of the tail. The fours pairs of 

 stalked papillse are thick and equidistant from each other, two 

 pairs being pre-anal and two pairs post-anal. The three pre- 

 anal ventral papilla are in a transverse row, and the median one 

 is much larger than the other two. Just behind the anus, one 

 pair immediately following the other, there are three pairs of 

 ventral papillae. Two additional pairs of ventral papillae are 

 found further down the tail, and their positions divide the tail 

 roughly into thirds. 



