Cobb — Nematodes, mostly Australian and Fijian. 37 



conoid, especially anteriorly, where it ends in a rounded head which is truncate at the 

 mouth. There are ten cephalic setae arranged as usual, one of each of the submedian 

 pairs being shorter, the others being about one-sixth as long as the head is wide. 

 I could discover no papillae. The conoid oesophagus is anteriorly one-half, posteriorly 

 three-fifths as wide as the neck, being only very slightly enlarged near the head ; its 

 lining is not very distinctly to be seen. From the rather indistinct cardiac coUum 

 the intestine is at once three-fourths as wide as the body. The duct of the ventral 

 gland ends in an ellipsoidal ampulla, and empties through a ventral pore at the 

 commencement of the second fifth of the neck (3"6%). The lateral fields are one- 

 fourth as wide as the body. The anterior half of the tail is concave-conoid, thence, 

 however, it is uniformly one-fifteenth as wide as at the base. The three small 

 elongated pyriform caudal glands lie just behind the anus. The ventral row of male 

 accessory sexual organs is composed of seven fascicles equidistantly arranged, the 

 posterior one being opposite the middle of the spicula and the whole row being 

 considerably longer than the tail (14°/^). The elongated spicula are of nearly 

 uniform size, being slightly arcuate in the proximal halves ; their length is half as 

 great again as that of the anal body-diameter. There are probably two testicles 

 arranged symmetrically. 



Hab. — Mud of a brook, Sydney, New South Wales, Australia. 



Genus PRISMATOLAIMUS, de Man. 



1. P. intermedius, BiitschU (?). 2-^ ? T '^a-s Ta''^ ■^'"™- The cuticle is traversed 

 by about four hundred transverse striae. Minute and extremely inconspicuous hairs 

 occur from place to place throughout the length of the body. The conoid neck 

 terminates anteriorly in a truncate head, bearing near its margin six equal spreading 

 setse, each about two-thirds as long as the head is wide. The lips are low and 

 indistinct, but appear to be three in number; they bore no papillae that I could see. 

 Neither eyes nor lateral organs were to be seen. The edges of the triquetrous 

 pharynx are indicated by three longitudinal ribs ; the main part is two-fifths as wide 

 as the head and this is continued by a diminishing part through which it is connected 

 with the oesophageal lumen. The oesophagus where it receives the pharynx is 

 two-thirds as wide as the corresponding part of the neck; it soon diminishes however 

 to one-half as wide as the neck, then gradually widens posteriorly until it becomes 

 two-thirds as wide as the base of the neck. The granular intestine, which is two-fifths 

 as wide as the body, is separated from the oesophagus by a deep, broad and very 

 distinct constriction, opposite to which are two bodies whose function is unknown to 

 me. I discovered nothing concerning the ventral gland, the longitudinal fields or 



