ON THE ANGUILLULIDE. 109 
Male. Length 77”, breadth 565". (Esophagus shorter. Anus zi,” from posterior 
extremity. Spicules sae long. Suckers none. 
Hab. Same as last species. 
10. D. vers, n. sp. (Plate X. figs. 57-59.) 
Female. Length +5”, breadth 355”. 
` External Characters.—Body tapering slightly anteriorly, but suddenly towards pos- 
terior extremity, which is acuminated. Head bluntly rounded. Integumental mark. 
ings not visible. 
Spear iovo long. Œsophagus ith of total length, posterior third enlarged. Intestinal 
cells not well marked, and containing light-coloured granules. Anus 315" from pos- 
terior extremity. Vulva at middle of body. 
Male. Length 45^, breadth 345”. 
Gsophagus only half as long as that of female. Anus 13," from posterior extremity. 
Spicules 51s" long. Suckers 5, mid-ventral, commencing about 335” above anus; dis- 
tance between first two xogo , between the others gradually increasing. 
Hab. Same as that of D. polyblastus. 
11. D. PALUSTRIS. 
Urolabes palustris, Carter, Ann. of Nat. Hist. 1859, 3 ser. vol. iv. p. 33, pl. ii. figs. 7, 9. 
* Female. Length (max.) 4”, breadth 345”. 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 papillæ ; 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" ... <“ Œsophagus 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.” 
“ Hab. Fresh water, in tanks and dirty drains wherever there is vegetable matter, 
mud, and putrescency, and in the gelatinous algæ during the ‘rains :” Island of Bombay.” 
12. D. LINEA, Diesing. 
Gordius lacteus, Müller?, 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 kais. Akad. der Wissen. xlii. Bd. p. 626. 
“Corpus intestino nigro percursum utrinque parum attenuatum, antice truncatum, 
margine paulo incrassato. Cauda subulata, fere jl; longitudinis corporis. Apertura 
genitalis feminea subeentralis supera. Longit. fem. 2-8”, crassit. ad 7”. 
“ Œsophagus postice bulbosus, dentieulo solummodo retracto viso. 
“ Hab. In fondo aquarum cum Senuride variegata, haud raro Dorpati."—Grube. 
