Cobb — Nematodes, mostly Australian and Fijian. 11 



11. M. muscorum, Dujardin. 2-1 %-i%i'X& "I'e as to 3 mm. The small dorsal tooth 

 is near the centre of the pharynx, which is nearly one-half as wide as the head. The 

 somewhat conoid oesophagus is three-fourths as wide as the neck, and the intestine is 

 three-fourths as wide as the body. The rectum equals the anal body-diameter in 

 length. The tail diminishes somewhat more rapidly near the terminus. The reflexed 

 ovaries, each containing about a dozen ova arranged single file, extend half-way back 

 to the projecting vulva. The eggs are one and one-half times as long as the body is 

 wide, and three-fifths as wide as long. The anterior sexual organ is somewhat the 

 larger. 



Hab. — Among moss, &c., Western Europe. 



,.25 



12. M. major, n.sp. \\ %^ \.f, 2.9 — n s*™™- The conoid neck terminates ante- 

 riorly in a truncate head bearing two rows of papillae arranged as usual. The lateral 

 organs are small and are situated near the lips, — slightly further forward than the 

 point of the dorsal tooth. The narrow mouth leads into a pharynx as long as the 

 head is wide, and two-fifths as wide as long, pointed at the bottom and strongly lined 

 with chitin. The tooth, which, though small, is conspicuous, is situated considerably 

 in front of the middle of the pharynx. The lateral fields are one-fifth as wide as the 

 body. The intestine, which is marked oflF from the oesophagus by a shallow but 

 distinct constriction, is greenish in colour, and composed of rather small cells showing 

 an indistinct tessellation ; the rectum is equal in length to the anal body-diameter. 

 The conoid tail is ventrally arcuate, and ends in a blunt terminus containing .a 

 spinneret of the usual form. The eggs are probably less than twice as long as wide. 

 The reflexed ovaries reach about half-way back to the vulva. 1-5 2-3 2-»~2-8~ 2-3 s-4mm. 

 The tail of the male somewhat resembles that of the female in general form, but is 

 more strongly arcuate. The spicula are elongated, arcuate, tapering toward both 

 ends, not cephalated, and twice as long as the anal body-diameter, and are situated 

 close together ; the accessory pieces are well developed, and surround the spicula 

 behind the middle, their blunt proximal points appearing in front of the ventral 

 contour of the spicula. The protruding-muscles of the spicula are attached to the 

 body-wall near the middle of the tail. A ventral row of about twelve conspicuous 

 innervated mammiform accessory organs occur in front of the anus, and extend over 

 a space about twice as long as the tail ; each organ is situated on the posterior side 

 of a transverse chitinous ridge extending one-fourth the distance round the body. 

 The anterior two or three and the posterior one of these organs are smaller than the 

 others ; they are equidistantly placed, except the posterior, which is removed some- 

 what from its fellows. Oblique copulatory muscles are found co-extensive with the 

 accessory organs and the crenate ejaculatory duct. The testicles occupy the 

 middle third of the body. There are two pairs of ventrally submedian papillae, also 



