40 Mr. H. J. Carter on Microscopic Filaridse. 



becomes rapidly invested, and therefore at this moment ready 

 with its soft thin coat to admit the spermatozoa ; and, 3rdly, 

 because the spermatozoon does not become active within its cell 

 until it arrives at this point, where it may be found in all stages 

 of liberation, in addition to being actually liberated. Moreover, 

 it might be inferred that the cell would form an impediment to 

 the ingress of the spermatozoon, an obstacle to incorporation, 

 and a deciduous product which the ovum could ill accommodate. 

 Thus, as the cells of the spermatozoa are thrown off at this 

 point, it is not improbable also that their remains form the 

 muco-granular contents of the csecal end of the ovisac, to which 

 I have already alluded. 



Hab. Fresh water, in tanks and dirty drains wherever there 

 is vegetable matter, mud, and putrescency, and in the gelati- 

 nous Alga? during the "rains.^^ Breeding from January, and 

 perhaps earlier, up to the end of April, but apparently not 

 after. Abundant throughout the year. 



Loc. Island of Bombay. 



Urolabes Glceocapsarum, n. sp. PL III. fig. 25. 



Female. Linear, cylindrical, striated transversely, gradually 

 diminishing towards the head, which is obtuse and without 

 papillge; also towards the tail, which is long and furnished with 

 a digital termination. Mouth in the centre of the anterior ex~ 

 tremity. Vulva a little anterior to the middle of the body. 

 Anus at the root of the tail. 



(Esophagus commencing with a cup-hke buccal cavity, from 

 which a narrow straight tube is extended back to the intestine. 

 Intestine much larger than the oesophagus, straight, and of 

 equal calibre throughout, abruptly terminating in the rectum, 

 which is narrow and obliquely directed towards the anus. Mus- 

 cular sheath of the oesophagus commencing a little distance 

 from the buccal dilatation, so as to leave a portion of the oesopha- 

 gus naked, and, increasing in size backwards, presenting at first 

 an oval and then a bulbous dilatation, after which it becomes 

 constricted opposite the union of the oesophagus with the intes- 

 tine. Intestinal sheath commencing with the intestine, and 

 ending at the rectum. Hepatic organ consisting of a layer of 

 brownish oil-globules occupying the interval between the intes- 

 tine and its sheath throughout. 



Organs of generation double, occupying the middle third of 

 the body, as in the foregoing species ; their form undetermined. 



Size. l-54th of an inch long and 1 -376th of an inch broad. 



Male. Somewhat smaller than the female; tail somewhat 

 shorter and thicker ; testis in the centre of the body, its form 



