ON THE ANGUILLULID X. 167 
of four strong patent setæ. Integument with most marked transverse strive, osoo 
apart, and equidistant longitudinal ridges, very obvious in the middle portions of body, 
but less evident towards extremities. 
Pharyngeal cavity indistinct. Œsophagus about 4th of total length, with post-pha- 
ryngeal and terminal swellings. Intestine undistinguishable, from the total absence of 
the usual hepatic cells and contained fat-particles. Anus 415" from posterior extremity. 
Spicules slightly curved and rather broad, 135" long; accessory pieces not recognized. 
Female, not seen. 
Hab. Marine surface-mud from estuary, Falmouth. 
Having only seen two specimens of this species, I am not quite certain about the 
exact structure of its pharynx, and the presence or absence of accessory pieces to the 
spieules. The almost uniform light colour of, and absence of pigment from its internal 
parts, combined with a somewhat opaque integument, was the cause of my failure in as- 
certaining these points. 
90. CHROMADORA !, Bastian. 
Rhabditis, Max Schultze ; Enoplus, Diesing. 
Gex. CHAR. Body tapering at extremities; conical posteriorly. Caudal sucker elon- 
gated, pointed; sucker-tubes not developed. Zntegument having transverse and 
longitudinal striæ, frequently somewhat clouded and opaque anteriorly; cephalic 
setae generally present, papillæ not. Pharyngeal cavity small and indistinct, 
with three cuneiform horny apophyses (apices downwards) extending backwards, 
and in contact. Esophagus having a more or less distinct swelling posteriorly ; 
muscular tissue not well developed. Intestine mostly covered with irregularly 
arranged, large-sized, coloured hepatic particles. Vulva at middle of body. Uterus 
bifid; segments symmetrical. Spicules two, somewhat narrow, curved. Accessory 
pieces well marked, about half as long as spicules. Ocelli two masses of reddish 
pigment on dorsum of anterior part of cesophagus ; sometimes wanting. Glandular 
system not much developed. Excretory ventral gland opening by a rather small duct 
nearly opposite middle of cesophagus(?). Lateral canals ...... 
Movements active. 
1. C. vursarıs, n. sp. (Plate XIII. figs. 233-235.) 
Female, length };”, breadth 51,". | 
External Characters.—Body clouded anteriorly, tapering from near the middle to 
either extremity, but somewhat widening again at head, which is truncated and pro- 
iu With small setze. Integument with very distinct transverse striæ at intervals of 
5000 » which are crossed by delicate longitudinal lines 30400 apart; small longitudinal 
ridge on either side of body ?. | 
1 » = | 
the vas Pigment, and copa, skin, cn account of the frequency with which the transparency of the integument of 
d "c pert of the body is obscured by a dark tinge of colour. 
7. aae body the markings of integument seem almost more dotted than linear. 
