116 MR. H. CHARLTON BASTIAN’S MONOGRAPH 
4? 
rounded; no papillæ. Integument thick; transverse striæ very distinct, +; apart, 
having lateral pores and three larger equidistant. channels opening through anterior part 
of ventral region. 
(Esophagus about ith of total length; constricted portion 1758 long. Intestine 
sparsely covered with light-coloured fat-particles. Anus gg from posterior extremity, 
Spicules cuneiform, slightly curved, 333" long. Accessory piece small and indistinct, 
somewhat triangular. 
Female, not seen. 
Hab. Mud from freshwater ponds, Falmouth ; and Easthampstead, Berks. 
2. T. SALSA, n. sp. (Plate IX. figs. 18, 19.) 
Female, length 4”, breadth ys . 
External Characters.—Body cylindrical, tapering much the same as last. Head more 
rounded, provided with two papilla, lateral (?). Integument thinner; transverse strie 
not so well marked. 
Esophagus Mh of total length; constricted portion large, s55” long. Intestine 
covered with rather large, light-coloured fat-particles. Anus s's” from posterior ex- 
tremity. Vulva posterior to the middle of body. Uterus bifid. Lateral canals in- 
distinct, 5555 broad. 
Male, not seen. 
Hab. About the roots of Rüppia maritima, brackish water, Swanpool, Falmouth. 
8. DIPLOGASTER, Max Schultze. 
GEN. CHAR.— Body tapering at extremities, especially at posterior. Caudal sucker very 
small, scarcely recognizable. Integument having longitudinal and also delicate 
transverse markings; setæ none (?); papillæ none (?); small lateral cervical mark- 
ings. Pharynx cup-shaped, having two horny valvular plates at the bottom. (Es 
phagus having a well-marked muscular swelling about its middle; canal of anterior 
half indicated by three bright lines; not so, however, posterior to muscular swelling. 
Intestine moderately covered with fat-particles, having a more or less tessellated ap- 
pearance. Vulva about the middle of body. Uterus bifid, segments symmetrical. 
Spicules two, curved, barbed. Accessory piece single, posterior, easily recognizable. 
Ventral excretory gland wanting. Lateral canals . . . | 
Movements very active. 
1. D. Ficror, n. sp. (Plate X. figs. 71-73.) 
Female, length 45", breadth 415". | 
External Characters.—Body white, slender, tapering very slightly anteriorly, but cot- 
siderably posteriorly, where it gradually tapers to a fine point; sucker not recognizable. 
Head truncate, unarmed. Integument with longitudinal striæ 55,459 apart, and 
imperceptible transverse strie 45155" apart. | 
Pharyngeal cavity z553 deep. Esophagus 4-1th of total length, swelling in th 
middle, 747” long. Intestinal cells containing a moderate number of light-coloured p" 
