Dr. L. Orley on Xematodes. 313^ 



the former tliere are the two horny structures resembling 

 triangular teeth which have been already described by Dujardin 

 and Sclineider. The intestine is nearly straight, and is made 

 up of a large number of cells. The rectum is an extremely 

 fine long chitinous tube; anus quite at the tip of the tail, 

 the orifice can only be made out with the aid of high powers. 

 The tail is not widened out, but is rounded and has much the 

 same form in the male and female. The coils of the ovaries 

 are very numerous, and extend from the caudal end as far 

 as the anterior portion of the oesophagus. A large number 

 of ova were found in the ccelom. Vulva O'l millim. from the 

 end of the head. A long and much coiled testis extends from 

 the commencement of the intestine to the anus, and fills up 

 the body-cavity. The seminal ducts are extremely short. Two 

 unequal spicula. Four pairs of papillse, at the margin of the 

 end of the tail, around the anus ; there are no papillas behind 

 the anus. The males appear to be more common than females. 



Found in Lamprotomls ceneus] organ not given. 



I feel no doubt that this worm is identical with the FiJaria 

 obtusa of Rudolphi, and that it is closely allied to F. pungens, 

 Schn., from which, however, it is specifically distinct, on account 

 of the form of its tail and the absence of papillae behind the 

 anus of the male. The free end of the horny process in the 

 oesophagus does not form a denticulate projection ; nor is the 

 head more pointed than the tail. Again, the anus of F. pun- 

 gens is situated further forwai-ds than it is in F. ecaudata. I 

 have found it necessary to make a change in the specific name, 

 in consequence of Schneider's discovery that Spiropiera obtusa 

 is a Filaria. I have endeavoured by correct description and 

 figures to fix the characters of this species. 



Filaria, sp. ? (PL X. fig. 3, a & h.) 



Length 1-35 millim., breadth 0'5 millim. ; length of the 

 body to that of the oesoph. = 10 : 1 ; length of the body to 

 that of the tail = 100 : 1. 



Body tapering gradually towards either end, and terminating 

 in a sharp tail. Mouth without lips, surrounded by six very 

 small papillae. A short delicate pharynx leads into the oeso- 

 phagus, which is fairly muscular at its commencement and 

 termination ; it gradually passes into an oval enlargement. 

 The intestine is straight and is constricted at some points; 

 its wall, which is formed of a number of small polyhedral 

 cells, is enormously thick. The anus is somewhat puffed out 

 by elevations of the cuticle; the anus is near the tip of the 

 tail. The cuticle is very strong and so finely ringed as to 

 appear to be almost smooth. The two lateral areas are espe- 



