OCR Text |
Show The uteri are crowded with eggs (PI. LII. fig. 1, ut.). The ovaries lie dorsally to the gut-branches and to some extent between them, whilst the testes are on the ventral side. The affinities of the genus are doubtful, but seem to me to be most probably with the Leptoplanidse, though perhaps some affinity with Stylochocestus may be suggested. Zygantroplana may be defined as follows:- An Acotylean genus in which the body is of an elongate-oval shape, without tentacles. The terminal genital ducts open into a small common antrum situated at the extreme hinder end of the body. Penis small, without stylet, no definite prostate gland. Pharynx subcentral. No marginal eye-groups. The species bears some resemblance to Leptoplana angusta Verrill [1888] pp. 485-486, pi. xl. fig. 8, pi. xliv. figs. 2, 2 «, 3, but the latter has, according to Verrill's figure, more distinct traces of a tentacle eye-group. L. angusta may perhaps prove to be congeneric with the present species. LATOCESTIDiE. L atocestus p l e h n i , sp. n. (Text-fig. 1 1 2 .) Several specimens " found in deep crevices of nullipore, or in shells, never in the open. The worm will crawl out of its hiding-place at night if kept in a basin of sea-water, and will even leave the water and reach out over the edge of the basin, holding the anterior half of its body horizontally in the air. 1 9 0 6 . ] TURBELLARIA OF THE CAPE YERDE ISLANDS. 711 Text-fig. 112. " Uniformly opaque and rather dark brown in colour. Central line darker. The margins are kept applied to surface on which |