410 TRICOMA AND OTHER NEW NEMATODE GENERA, 



and inward, — manifestly tactile hairs. The lateral organs are 

 one-sixth as wide as the head ; they appear to be circular with a 

 central button, but are really spiral, and are situated as far behind 

 the cephalic set?e as the latter are behind the mouth. There are 

 no eye-spots. The pharynx is double, the anterior chamber being 

 half as wide as the head and twice as long as wide, and the 

 posterior chamber being half as wide and one-fourth as long as the 

 anterior part. Both chambers are tolerably uniform in diameter, 

 but the anterior expands a little in the region of the cephalic 

 setce. The conoid oesophagus is separated from the intestine by a 

 distinct but not deep cardiac collura. The intestine is three- 

 fourths as wide as the body, and its thin wall is built of small 

 cells of such a size that about sixteen side by side make the 

 circumference. The intestine commonly contains what appears 

 to be vegetable matter. The length of the rectum equals that 

 of the anal diameter of the body. There is a ventral gland. 

 The nerve-ring is slightly oblique. The slightly incurved tail 

 ends in a blunt rounded terminus one-third as wide as the 

 base of the tail. The three small caudal glands are confined 

 to the tail. 



^.^ ^.Q ^.j — Y- — Ts 2- mm. The tail of the male closely resembles 

 that of the female. There is no bursa or other supplementary 

 organ, and apparently no papillae. The two equal linear spicula 

 are slightly bent near the middle, and are enlarged near the 

 pointed distal extremity ; they are one and one-third times 

 as long as the anal body-diameter, or about one-third as long 

 as the tail, and their proximse are cephaloid by expansion. The 

 large accessory pieces are three-fourths as long as the spicula 

 and are in contact with them in the distal half. The narrow 

 ejaculatory duct is three times as long as the tail, and has a 

 chitinous outlet parallel with the spicula. The spermatozoa 

 appear to develop in batches, and the testicles, therefore, present 

 a i)eculiar appearance, — as if separated by thick transverse walls 

 into a number of chambers, or as if in a manner segmented. 



Hab.— Tort Jackson, New South Wales, Australia, 1891. 



