Cobb — Nematodes, mostly Australian and Fijian. 51 



is not more than half as long as the anal body-diameter. The unicellular ventral 

 gland lies just behind the oesophagus, and empties, by means of a slender tube 

 devoid of an ampulla, through the ventral excretory pore, situated half-way between 

 the nerve-ring and the posterior end of the oesophagus. The distance between the 

 two lateral wings is equal to one-fourth the length of the diameter of the body. 

 The median fields are very narrow ; no submedian fields came under notice. The 

 tail is conoid from the conspicuously-projecting vulva. The anus is inconspicuous. 

 There are no anal glands. The vulva, a transverse slit one-half as long as the body 

 is wide, is opened during copulation and oviposition by means of four pairs of obhque 

 muscles arranged in two antagonistic groups, one anterior to the vulva and the other 

 posterior. Each of the posterior pairs is attached distally near the ends of the slit 

 and proximally to th« body wall near the ventral submedian lines some distance back 

 from the vulva. The antagonistic muscles are arranged similarly, but in front of the 

 vulva. The short vagina leads forward into the uterus, which is as long as the 

 distance from the vulva to the anus, and in adult worms commonly contains one or 

 two eggs (three-fourths as wide as the body and twice as long as wide), which are in 

 the later stages of segmentation. The anterior part of the uterus is occupied by 

 numerous spermatozoa, which are placed there by copulation with a male, and which 

 fertilise the Q^'g immediately on its entry into the uterus. A rudimentary sac-like 

 posterior branch of the sexual organ extends backward from the vulva half-way to 

 the anus. The females are viviparous or ovo viviparous, -s i-? 1-9 ~2- — Ft i*mm. In 

 the male the anus projects so as to be prominent. The transparent ribless bursa 

 originates anteriorly opposite the proximal ends of the spicula, and ends behind the 

 middle of the tail or near its end. The two equal elongated arcuate-cuneiform 

 spicula are one and one-half times longer than the anal body-diameter, their proximse 

 being slightly cephaloid by expansion. The thin and inconspicuous accessory pieces, 

 in which the spicula slide, are half as long as the spicula. In the neighbourhood of 

 each spiculum and behind the anus I observed cells which ma,y be glandular in 

 function. The single testicle extends forward to near the oesophagus. The ripe 

 spermatozoa are one-sixth as wide as the body. 



Syn. — T. dipsaci, Ktihn ; T. allii, Beyerinck ; T. hyacinthi, Prilleux ; T. 

 Haversteinii, Kiihn. 



Hab. — Parasitic in onions, hyacinths, teasel, rye, oats, buck-wheat, clover, 

 potatoes, &c. 



3. T. granulosus, n.sp. 2-3 ^t? ^2-8 ^3-3 ^'4 ■'^■°"- The cuticle is traversed by about 

 four hundred and seventy-five transverse strise, which exist in the outer as well as 

 the inner layers. The conoid neck terminates anteriorly in a head somewhat rounded 

 in front and bearing six somewhat spherical lips. The stout spear is one-tenth as 



