222 F. W. GAMBLE, B.SC. 



Habitat.— In 4—18 fms., Plymouth and Port Erin (F. W. G) 

 Distribution. — Trieste (v. Graff). 



45. Enterostomy fingalianum Claparede (35). 



Length 1 mm. Body elongate, cylindrical, rounded at both ends. 

 Colour white ; the short, almost central gut reddish. The epidermis 

 contains small fusiform rhabdites, figured by Hallez (50, pi. ii, fig. 25). 

 Mouth at the commencement of the posterior third. Pharynx 

 cylindrical at the hinder margin of the intestine. Brain bilobed. 

 Eyes fairly large, arranged as in Ent. austriacum. Genital pore 

 between the mouth and the hinder end. Testes numerous, surrounding 

 the brain. Vasa deferentia exhibit dilatations along their course. 

 Penis pyriform, containing masses of accessory secretion in its basal 

 portiou ; provided at its tip with small papillae. Claparede's original 

 description and figures are not sufficiently distinctive to enable us to 

 determine whether the germ- and yolk-glands are distinct or not. In 

 my specimen the yolk-glands form lateral masses uniting behind the 

 brain, and again posteriorly behind the genital aperture. The germ- 

 glands lie at the sides of the pharynx, and appear to be separate from 

 the yolk-glands. As, however, only a single specimen was available, 

 further observations are greatly needed on this and other points, such 

 as the presence of a ciliated " head-furrow " (which Bohmig has 

 demonstrated in other forms by the use of methylene-blue in cases 

 where superficial observation had previously failed) and the possible 

 connection of genital and oral apertures. 



Habitat. — Skye (Claparede) ; among Balanus, 10 fms., Plymouth 

 Sound (F. W. G). 



Distribution. — Wimmereux (Hallez). 



46. Enterostomy coicum, v. Graff. 



Length 1 *7 mm. Body gradually tapering forwards from the hinder 

 end. Beneath the epidermis are yellowish-green granules, especially 

 abundant at the sides. The pharynx is cylindrical, muscular, placed 

 far posteriorly. The spermatozoa consist of a central rib bearing 

 lateral membranes, and produced into a fine flagellum in front and 



