Cobb — Nematodes, mostly Australian and Fijian. 9 



1^ apart. The intestine is laid close on to the cardia, — thus giving rise to a double 

 constriction in the cardiac region, — and is composed of cells of such a size that twelve 

 side by side make up its circumference. The concave-conoid rectum equals the anal 

 body-diameter in length. What had every appearance of being the excretory pore 

 occurred immediately behind the nerve-ring of every one of the numerous specimens 

 examined. The lateral fields appear to be one-fifth as wide as the body. The tail is 

 conoid to the terminus, which has a diameter one-seventh as great as the anal body- 

 diameter. The vulva is not prominent. The uterus is as long as the reflexed part 

 of the ovary, which reaches two-fifths the way back to the yulva. The ova are 

 arranged single file. This worm is well drawn on PI. i. 



Hab. — Found in soil about the roots of banana plants, Fiji. No males were seen. 



3. M. crassiusculus, Dujardin. \ ; ^[^ "4.3 ^° -smm. This seems to be a doubtful 

 or insufficiently-described species. 



Hab. — France. 



4. M. Tunbridgensis, Bastian. 3-4 ? \i ^s-t ^3-2 ^i"™- This species is well charac- 

 terised by the head diminishing in size opposite the base of the pharynx. 



Hab. — Tunbridge, England. 



30 



5. M. tridentatus, de Man. 2-1 2-6 "a- °3-i — Ts s-^mm. As its name indicates, this 

 species possesses three teeth ; they are of equal size, their apices being situated some- 

 what in front of the middle of the triquetrous pharynx. The oesophagus gradually 

 widens posteriorly. The intestine, which is two-thirds as wide as the body, is 

 separated from the oesophagus by a transparent cardiac region. The rectum is three- 

 fourths as long as the anal body-diameter. The tail is conoid in both sexes. 

 2TT6 — 3- 3-1 2- 27mm. Thc male has a ventral row of fifteen to seventeen papillae in 

 front of the anus, and presents also both dorsal and ventral papillae on the tail. Each 

 of the two equal slender arcuate spicula has a median stiffening piece of chitin. The 

 accessory piece is two-parted, dentate, and encloses the spicula. Oblique copulatory 

 muscles appear to be present. 



Hab. — Moist soil, Holland ; not common. 



6. M. brachyurus, Btitschli. ; \ T fe ^^7^ i'^""- The nearly cylindrical neck of 

 this active species is said to terminate in a truncate head bearing a single row of 

 rather large papillae. The beaker-shaped pharynx is one-third as wide as the head, 

 and twice as long as wide. Rasp-like areas on the wall of the pharynx oppose the 

 dorsal tooth. The tail is conoid, blunt and arcuate. Two ventral papillae are found 

 near the vulva, one in front of it and one behind it. The reflexed portions of the 



