ON THE ANGUILLULID^. 109 



Male. Length yj", breadth 5-^". (Esophagus shorter. Anus y^" from- posterior 

 extremity. Spicules -^^" long. Suckers none. 

 Sab. Same as last species. 



10. D. INERS, n. sp. (Plate X. figs. 57-59.) 

 1 " 



Female. Length xa", breadth 



28 5 



External Characters. — Body tapering slightly anteriorly, but suddenly towards pos- 

 terior extremity, which is acuminated. Head bluntly rounded. Integumental mark, 

 ings not visible. 



Spear tooo" loJig- (Esophagus \i\x of total length, posterior third enlarged. Intestinal 

 cells not well marked, and containing light-coloured granules. Anus 33-3" from pos- 

 terior extremity. Vulva at middle of body. 



Male. Length xt", breadth -5^". 



(Esophagus only half as long as that of female. Anus 4^" from posterior extremity. 

 Spicules s-g-g" long. Suckers 5, mid-ventral, commencing about -^30" above anus ; dis- 

 tance between first two two", between the others gradually increasing. 



Sab. Same as that of J), polyblastus. 



11. D. PALUSTRIS. 



Urolabes paluslris. Carter, Ann. of Nat. Hist. 1859, 3 ser. vol. iv. p. 33, pi. ii. figs. 'J, 9. 



" Female. Length (max.) \", breadth 3^". Linear, cylindrical, smooth, white or 

 colourless, unstriated transversely, gradually diminishing towards the head, which is 

 obtuse and terminated by a distinct labiate portion, furnished with at least two, if not 

 four, indistinct papillae ; diminishing abruptly towards the tail, which is attenuated and 

 whip-like. Mouth in the centre of the anterior extremity. Vulva a little in front of the 

 middle of the body. Anus at the root of the tail." ... " (Esophagus commencing 

 with a cup-like or buccal cavity, into the posterior part of which projects a sharp-pointed, 

 horny, narrow tube (fig. 11 d), which is continued backwards in a straight line to the 

 intestine, and is exsertile at the oral orifice." 



" Male the same as the female, but smaller, and with the tail truncated almost close 

 to the anus." 



" Sab. Fresh water, in tanks and dirty drains wherever there is vegetable matter, 

 mud, and putrescency, and in the gelatinous algae during the ' rains :' Island of Bombay." 



12. D. LINBA, Diesing. 



Gordius lacteus, Miiller?, Hist. Verm. terr. et fluv. i. ii. 32. 

 G. linea, Oken?, Lehrb. d. Naturg. Zool. i. Abtheil. 192. 



Anguillula linea, Grube, Wiegmann's Arch., 1849, i. 367-368, tab.-vii. figs. 15-17; Diesing, Syst. Hel- 

 minth, p. 557- 

 Dorylaimus linea, Diesing, Sitzungsber. der Icais. Akad. der Wissen. xlii. Bd. p. 626. 



" Corpus intestino nigro percursum utrinque parum attenuatum, antice truncatum, 

 margine paulo incrassato. Cauda subulata, fere yj longitudinis corporis. Apertura 

 genitalis feminea subcentralis supera. Longit. fern. 2-8'", crassit. ad y'". 



" (Esophagus postice bulbosus, denticulo solummodo retracto viso. 



" Sab. In fondo aquarum cum Scenuride variegata, baud rare Dorpati." — Grube. 



