New Zealand Nematodes. 



373 



The tail of the female is concave-conoid to a rather blunt 

 point, while that of the male is conical to a rounded terminus, 

 where a few innervated papillae are to be seen. The anus is 

 neither raised nor depressed, and though easily to be discovered is 

 not rendered conspicuous by any accessory apparatus in its imme- 

 diate vicinity. 



The vulva is depressed, and from it the vagina extends half 

 way across the body, where it divides into two uteri, one extending 

 forward and the other extending backward. These, together with 

 the reflexed ovaries, occupy the middle third of the body. No eggs 

 or young were seen. 



24 QQ . 



6" to 6'33 mm. 



•0 6-4 23-6 -M-" 



•5 21 2-7 3- 11 



A row of ventral tactile papillae, numbering thirty-five to 

 forty-two, is found some distance in front of the anus on the male. 

 Reckoning from the anus these occupy the second fourth of the 

 pre-rectal region. These papillae are plainly to be seen only when 

 the body is strongly incurved, and then only as doubly innervated, 

 low and inconspicuous contiguous elevations. 



The two equal arcuate spicula are two and one-half to three 

 times as long as the anal body-diameter, and are of the nature 

 characteristic of most of the species of the genus. Powerful 

 oblique copulatory muscles exist in the pre-rectal region. 



The species is a typical Dorylaimus of large size, readily dis- 

 tinguished from Novae Zealandiae by the structure of the head, 

 the shortness of the female tail and the number of the male 

 accessory papillae. 



Habitat, Lakes Wakatipu, Waikaremoana, and Manapouri, 

 New Zealand, at a depth of 200 to 1100 feet. 



Register of the Species, Localities and Depths. 



Depth in feet. 



Lake Taupo, 



Dorylaimus Novae Zealandiae. 

 Mermis Novae Zealandiae. 



350 

 350 

 370 

 Lake Waikaremoana, 840 „ „ „ 



300 — 600 Dorylaimus profundis. 



200 — 600 Dorylaimus profundis and Mo- 



nonchus rex. 

 360 Dorylaimus profundis. 



500—1100 

 200 — 300 Dorylaimus profundis and Mo- 



nonchus rex. 

 1150 Dorylaimus profundis and Mo- 



nonchus rex. 



Lake Manapouri, 

 Lake Wakatipu 



