158 MR. H. CHARLTON BASTIAN’S MONOGRAPH 
Pharyngeal cavity somewhat globular, about 455" in depth, surrounded about middle 
by a dark band, apparently due to markings of its walls, whilst anteriorly more delicate 
lines are seen converging towards the mouth. Œsophagus about 4rd of total length, 
Intestine densely covered with fat-particles of a dark colour, obscurely tessellate, Anus 
sy from posterior extremity. Vulva considerably posterior to middle of body, +45” in 
front of anal cleft. Vaginal gland single, brownish, pyriform, projecting baekwards, 3h 
long, by 345 wide. Æxcretory ventral gland tubular, not dilated at extremity, extend. 
ing from posterior part to a little in front of middle of cesophagus, where its duct Opens, 
Male, length +5”, breadth 152° — G/sophagus shorter than in female. Anus 4” from 
posterior extremity. Spicules long, rather narrow, and moderately curved, 41." in length; 
accessory piece single, shield-shaped, with two grooves, along which the spicules elide, 
1000 long, by 1255 broad. 
Hab. Marine surface-mud from estuary, Falmouth. 
25. COMESOMA!, Bastian. 
GEN. CHAR. Body tapering at extremities. Caudal sucker moderately distinct; sucker- 
tubes none (?). Integument having transverse and longitudinal striæ, spiral lateral 
cervical markings, sete more or less abundant about anterior and posterior ex- 
tremities, papillæ none. Pharyngeal cavity small, cup-shaped. (Zsophagus muscular, 
more or less swollen posteriorly. Intestine moderately well covered with hepatie 
particles, mostly having a tessellate arrangement. Vulva about the middle of body. 
Uterus bifid; segments symmetrical. Spicules very long and narrow. Accessory 
pieces none, or, if present, single, small, and indistinct. Ocelli none, Anal 
glands (?). Excretory ventral gland consisting of a slightly dilated posterior portion 
and a wide duct extending from commencement of intestine to about middle of 
esophagus. Lateral canals having a faintly granular appearance. 
Movements moderately rapid, frequently forming body into a circular coil. 
l. CoMESOMA VULGARIS, n.sp. (Plate XIII, figs. 195-197.) 
Female, length +”, breadth 4 i. 
External Characters.—Body opaque white, tapering slightly towards head, but more 
considerably towards posterior extremity, which is long and narrow, but slightly swollen 
at termination. Head rounded, provided with two circlets of setze, the anterior (four) 
being very long, but those forming the posterior, from six to eight in number, being 
much shorter. Other setæ scattered over anterior part of body. Integument with lon- 
gitudinal markings + soo apart, and more delicate transverse striæ 15400 apart 
lateral spiral marking at same level as second circlet of setze. 
Pharyngeal cavity small, cup-shaped.  Œsophagus „th of total length. Intestine 
DUN with light-coloured hepatic particles, having a tessellate arrangement. Anus 
7r from posterior extremity. Vulva at middle of body. Exeretory duct opening oppo 
site middle of œsophagus, 
Mule, same size as female. Posterior extremity having setæ scattered over its surface, 
1 
xöun, hair, and ea, body. 
