158 MR. H. CHARLTON BASTIAN'S MONOGRAPH 



Pharyngeal cavity somewliat globular, about 4^" in depth, svirrouuded about middle 

 by a dark band, apparently due to markings of its walls, whilst anteriorly jnore delicate 

 lines are seen converging towards the mouth. (Esophagus about \x<\. of total length. 

 Litestine densely covered with fat-particles of a dark colour, obscurely tessellate. Amis 

 sV" from posterior extremity. Vulva considerably posterior to middle of body, ybo' " ^^ 

 front of anal cleft. Vaginal gland single, brownish, pyriform, projecting backwards, •3-33' " 

 long, by -5^" wide. Excretory ventral gland tubular, not dilated at extremity, extend- 

 ing from posterior part to a little in front of middle of oesophagus, where its duct opens. 



Male, length ^", breadth xst" (Esophagus shorter than in female. Anus ^f" from 

 posterior extremity. Spicules long, rather narrow, and moderately curved, xir " i^^ length ; 

 accessory p)iece single, shield-shaped, with two grooves, along which the spicules glide, 

 rmo" long, by ttso" broad. 



Hab. Marine surface-mud from estuary, Palmouth. 



25. COMESOMA', Bastian. 



Gen. Char. j5of/?/ tapering at extremities. Caudal sucker -moderately distinct; sucker- 

 tubes none (?). Integument having transverse and longitudinal striae, spiral lateral 

 cervical markings, setae more or less vbundant about anterior and posterior ex- 

 tremities, papillse none. Pharyngeal cavity small, cup-shaped. (Esophagus muscular, 

 more or less swollen posteriorly. Intestine moderately well covered with hepatic 

 particles, mostly having a tessellate arrangement. Vulva about the middle of body. 

 Uterus bifid ; segments symmetrical. Spicules very long and narrow. Accessory 

 jrieces none, or, if present, single, small, and indistinct. Ocelli none. Anal 

 glands (?). Excretory ventral gland consisting of a slightly dilated posterior poi'tion 

 and a wide duct extending from commencement of intestine to about middle of 

 oesophagus. Lateral canals having a faintly granular appearance. 

 Movements moderately rapid, frequently forming body into a circular coil. 



1. CoMESOMA VULGARIS, n. sp. (Plate XIII. figs. 195-197.) 



Female, length \", breadth -02-2". 



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 setae, the anterior (four) 

 being very long, but those forming the posterior, from six to eight in number, being 

 mvich shorter. Other setae scattered over anterior part of body. Integument with lon- 

 gitudinal markings yxoo" apart, and more delicate transverse striae ttooo" apart; 

 lateral spiral marking at same level as second circlet of setae. 



Pharyngeal cavity small, cup-shaped. (Esoj)hagns -rr^li of total length. Intestine 

 covered with light-coloured hepatic particles, having a tessellate arrangement. Anus 

 yx" from posterior extremity. Vulva at middle of body. Excretory duct opening oppo- 

 site middle of oesophagus. 



JIalc, same size as female. Posterior extremity having setae scattered over its surface, 



' Kofxi], hair, aud iriJ/ja, body. 



