ON THE ANGUILLULIDÆ. 163 
generally dark fawn-coloured hepatic particles. Vulva about the middle of body. 
Uterus bifid; segments symmetrical. Spicules rather thick and solid, of a yellowish 
colour. Accessory pieces four, in two pairs, the longer being somewhat lamelli- 
form, whilst the external pair are thick and quadrilateral. Ocelli, two aggregations 
of brownish pigment on dorsum of cesophagus; not present in some species. Glan- 
dular system well developed; subcutaneous, glandular, cell-like bodies numerous; 
anal glands three, occasional. Zxeretory ventral gland terminating in moderate- 
sized duct, opening opposite middle of cesophagus. Lateral canals . . . . 
Movements moderately active. 
* Caudal sucker well marked, cylindrical. 
1. C. OCELLATUS, n. sp. (Plate XIII. figs. 210-2124.) 
Female, length 15", breadth 415". 
External Characters.—Body tapering slightly forwards, but much more towards 
posterior extremity. Head rounded, provided with a circlet of four small setæ. Integu- 
ment with delicate transverse striæ, faintly visible, 55555 apart; shreds easily peeling 
off under pressure. 
Pharyngeal cavity 5555 deep, Œsophagus rather less than 3th of total length. Intes- 
line thinly covered with fat-particles, non-tessellated. Anus 415" from posterior ex- 
tremity. Vulva slightly anterior to middle of body. Ocelli, two small greenish-brown 
masses of pigment, gg from anterior extremity. Subcutaneous gland-cells numerous, 
rounded, granular, giving the animal a peculiar maculated appearance. 
Male, length 24” breadth 14”. 
Anus 335” from posterior extremity. Spicules curved, somewhat wedge-shaped, 545” 
long; accessory pieces four ; principal pair rather long, narrow, and united in middle 
line; external pair rounded. 
Hab. About Cladophora rupestris from tide-pools, Falmouth, 
2. C. cæcus, n. sp. (Plate XIII. figs. 213, 214.) 
Female, length 4s", breadth 435. 
External Characters.—Body tapering slightly forwards, but gradually narrowing to a 
point posteriorly. Head broad, truncate, having a circlet of four small sete. Integu- 
ment with almost imperceptible transverse striæ, about 35000 apart. 
Pharyngeal cavity cup-shaped. Œsophagus about 4th of total length. Intestine 
sparsely covered with large, coloured hepatic particles. Anus 533$" from posterior ex- 
tremity. Vulva anterior to middle of body. Ocelli wanting. Subcutaneous gland-cells 
round or oval, granular, about 5000 in diameter. 
Male, not seen. 
Hab. Marine surface-mud from estuary, Falmouth. 
3. O. onnarvs, n.sp. (Plate XIII. figs. 215, 216.) 
Female, length 37 , breadth 417". 
External Characters.—Body stout, light fawn-coloured, tapering slightly forwards, 
but gradually to a point posteriorly, where it terminates in an elongated -— À sucker- 
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