ON THE ANGUILLULID^. 163 



generally dark fawn-coloured hepatic particles. Vulva about the middle of body. 

 Uterus bifid ; segments symmetrical. Spiciiles rather thick and solid, of a yellowish 

 colour. Accessory pieces four, in two pairs, the longer being somewhat lamelli- 

 form, whilst the external jiair are thick and quadrilateral. Ocelli, two aggregations 

 of brownish pigment on dorsum of oesophagus ; not present in some species. Glan- 

 dular system well developed ; subcutaneous, glandular, cell-like bodies numerous ; 

 anal glands three, occasional. Excretory ventral gland terminating in moderate- 

 sized duct, opening opposite middle of oesophagus. Lateral canals .... 

 Movements moderately active. 



* Caudal sucker well marked, cylindrical. 



1. C. OCELLATUS, n. sp. (Plate XIII. figs. 210-212 a.) 

 Female, length -^", breadth ^g-o"- 



External Characters. — Body tapering slightly forwards, but much more towards 

 posterior extremity. Head rounded, provided with a circlet of four small setae. Integu- 

 ment with delicate transverse striae, faintly visible, -aoooo" apart ; shreds easily peeling 

 off under pressure. 



Pharyngeal cavity -as-oo" deep. Oesophagus rather less than yth of total length. Intes- 

 tine thinly covered with fat-particles, non-tessellated. Anus yts" fi'om posterior ex- 

 tremity. Vulva slightly anterior to middle of body. Ocelli, two small greenish-brown 

 masses of pigment, g^" from anterior extremity. Stibc-utaneous gland-cells numerous, 

 rounded, granular, giving the animal a peculiar maculated appearance. 



Male, length -^" breadth 5-3-5". 



Anus 3-I s" from posterior extremity. Spicules curved, somewhat wedge-shaped, 5-^" 

 long ; accessory pieces four ; principal pair rather long, narrow, and united in middle 

 line ; external pair rounded. 



JSab. About Cladophora rupestris from tide-pools, Falmouth. 



2. C. c^cus, n. sp. (Plate XIII. figs. 213, 214.) 

 Female, length ^5-", breadth 3^". 



External Characters. — Body tapering slightly forwards, but gradually narrowing to a 

 point posteriorly. Head broad, truncate, having a circlet of four small setae. Integu- 

 ment with almost imperceptible transverse striae, about 30000 " apart. 



Pharyngeal cavity cup-shaped. (Esophagus about yth of total length. Intestine 

 ' sparsely covered with large, coloured hepatic particles. Anus -^ts" from posterior ex- 

 tremity. Vulva anterior to middle of body. Ocelli wanting. Subcutaneous gland-cells 

 round or oval, granular, about go^oo " i^ diameter. 



Male, not seen. 



Eab. Marine surface-mud from estuary, Falmouth. 



3. C. OENATUS, n. sp. (Plate XIII. figs. 216, 216.) 

 Female, length ^t") breadth 3^". 



External Characters. — Body stout, light fawn-coloured, tapering sUghtly forwards, 



but gradually to a point posteriorly, where it terminates in an elongated sucker ; sucker- 



y 2 



