ON THE ANGUILLULID^. 167 



of four strong patent set?e. Integviment with most marked transverse striae, tootto" 

 apart, and equidistant longitudinal ridges, very obvious in the middle portions of body, 

 but less evident towards extremities. 



Fharyngeal cavity indistinct, (Esojohagiis about |th 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. Anns -^" from posterior extremity. 

 Spicules slightly curved and rather broad, xie" lo^ig 5 accessory pieces not recognized. 



Female, not seen. 



Sab. 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 

 spicules. 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. 



30. CHROMADOEA i, Bastian. 



Wiabditis, Max Schultze ; Enoplus, Diesing. 



Gen. Chau. Body tapering at extremities ; conical posteriorly. Camlal sucker elon- 

 gated, pointed; sucker-tubes not developed. Integument having transverse and 

 longitudinal striae, frequently somewhat clouded and opaque anteriorly; cephalic 

 setae generally present, papillae 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 oesophagus ; sometimes wanting. Glandular 

 system not much developed. Excretory ventral gland opening by a rather small duct 



nearly opposite middle of oesophagus (?). Lateral canals 



Movements active. 



1. C. VULGARIS, n. sp. (Plate XIII. figs. 233-235.) 



Female, length -^", breadth ^hi"- 



Fxternal Characters. — Body clouded anteriorly, tapering from near the middle to 

 either extremity, but somewhat widening again at head, which is truncated and pro- 

 vided with small setae. Integument with very distinct transverse striae at intervals of 

 which are crossed by delicate longitudinal lines -gwoo" apart ; small longitudinal 



1 



5000 



ridge on either side of body ^. 



' XP<3f "> pigment, and lop'a, skin, on account of the frequency with which the transparency of the integument of 

 the anterior part of the body is obscured by a dark tinge of colour. 



« About anterior part of body the markings of integument seem almost more dotted than linear. 



