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Show 28 MR. W. F. LANCHESTER ON THE [Jan. 17, instead of at the anterior border of the middle third ; in consequence of which the kidneys do not nearly reach to these origins. The individual from Pasir Panjang was, in life, coloured orange, with the tip of the tail black. 5. P hascolosoma p e l lu c id um Keferstein. Selenka, tom. cit. p. 32. Loc. Singapore. Pasir Panjang ; one specimen. Malacca. Pulau Jawi; two specimens, from under deep stones. Selenka says in regard to the kidneys in this species : " Segmen-talorgane von halber Korperlange." Keferstein, on the other hand, says : " Segmentalorgane kurz " ; and his figure accords with this description. These specimens agree with Keferstein's description in this respect; the kidneys are only one-sixth of the length of the body in the individual from Singapore, a little more than one-sixth in those from Malacca. There are no hooks on the introvert in any of these examples, and in those from Malacca the retractors are notably thicker than in the Singapore specimen. On the tails of these individuals (i. e. from both localities) is fixed a species of the Entoproctous Polyzoan Loxosoma, which Dr. Harmer has kindly undertaken to examine. III. Genus P h y sc o som a . 6. P h yscosoma scolops Sel. & de Man. Selenka, tom. cit. p. 75. Loc. Singapore. Raffles Lighthouse ; two specimens. S'alat Sinki (strait between Pulau Brani and Blakang Mati), 5 fathoms, bottom of mud and stones; one small specimen. In one example, the largest, the introvert is even longer than the body, being lg times the length of the latter. As regards the longitudinal muscle-bands, there are only 17-19, instead of 20-21 ; the retractors, moreover, do not fuse till very far forward in the introvert. 5. The Marine Fauna of Zanzibar and British East Africa, from Collections made by Cyril Crossland in the Years 1901 and 1902.- Gephyrea. By W . F. L a n c h e s t e r , M.A., Assistant Lecturer and Demonstrator in Zoology in University College, Dundee*. [Received November 1, 1904.] (Plate I.t) This collection was made by Mr. Crossland in East Africa during the years 1901-1902; it includes in all examples of 20 species, * Communicated b y the S e c r e t a r y . t For explanation of the Plate, see p. 3o. |