408 TRICOMA AND OTHER NEW NEMATODE GENERA, 



Apparently there exists a ventral row of pre-anal supplementary 

 organs of small size, but they were only to be seen dimly. 



Hah. — I found this species inhabiting mud and sand at Neutral 

 Bay, Port Jackson, New South Wales, Australia. 1893. It 

 appeared to be common. 



1' 7*8 20* 58 78' 



6. M. AUSTRALis, n.sp. 2^-2^8 — ¥i 3^1 2^ l-32mm. The thin 



transparent cuticle presents faint and fine transverse striae, and 

 bears inconspicuous hairs throughout the length of the body. 

 The conoid neck terminates in a somewhat rounded head bearing 

 ten setse arranged in the usual manner. The lip-region is trans- 

 parent and the lips themselves are one-half as high as the head is 

 wide, and are destitute of papillse. The circular lateral organs 

 are one-third as wide as the head, and are removed from the 

 anterior extremity a distance twice as great as the width of the 

 head. The pharynx, broad opposite the lips, narrows thence, 

 and ends half-way to the lateral organs, and is therefore compara- 

 tively large. The oesophagus in its anterior part is two-thirds as 

 wide as the corresponding part of the neck ; posteriorly the neck 

 widens, and there the oesophagus is consequently only one-half as 

 wide as the neck. The lining of the oesophagus is distinctly to be 

 seen. The thick-Avalled intestine begins at once at the distinct 

 cardiac collum to be wider than the oesophagus — namely, three- 

 fourths as wide as the body. The cardia is not large, but is 

 distinct. The cells of the intestine, as usual, contain numerous 

 granules. The rectum in the female is as long as the anal body- 

 diameter. The nature of the ventral gland is unknown to me. 

 The nerve-ring encircles the oesophagus squarely. The tail is 

 conoid from in front of the inconspicuous anus, and ends in a 

 slight expansion bearing two hairs near where the secretion of the 

 caudal glands is poured out. The length of the vagina is equal to 

 half the width of the body, and it ends outwardly in an incon- 

 spicuous vulva. The eggs are half as wide as the body and three 

 times as long as wide. The smaller posterior ovary reaches nearly 

 half-way to the anus ; the anterior ovary ends at three-fourths the 

 distance from the vulva to the cardiac constriction. The male 

 has not been seen. 



