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Show 1897.J ON THE PLANKTON OF THE FAEROE CHANNEL. 803 HYLAMBATES JOHNSTONI, sp. n. (Plate XLVI. fig. 4.) Vomerine teeth in two small groups between the choanae. Head much broader than long; snout rounded, as long as the diameter of the eye; interorbital space as broad as the upper eyelid ; tympanum two thirds the diameter of the eye. Fingers with a slight rudiment of web; toes half-webbed; disks well developed ; inner metatarsal tubercle large, compressed, crescentic, very prominent. The tibio-tarsal articulation reaches the eye. Skin smooth above, granulate on the throat, belly, and lower surface of thighs. Purplish or brown above, with a more or less distinct dark triangular marking on the back, the apex reaching tbe occiput; white dots usually scattered on the back; limbs with very indistinct dark cross-bars ; a white streak borders the upper lip, the outer side of the forearm and hand, the anal region, the heel, and the outer side of the foot; hinder side of thighs dark brown ; lower parts white. From snout to vent 42 millim. Closely allied to H. anchietce, Bocage, from Angola. Three specimens from Kondowe-Karonga, and one from the Nyika Plateau. EXPLANATION OF PLATE XLVI. Fig. 1. Lygosoma johnstoni, Blgr. Side views of head and anterior portion of body and pelvic region, and upper view of head (p. 801). 2. Glypholycus whytii, Blgr. Upper, lower, and side views of head (p. 802). 3. Arthroleptis whytii, Blgr (p. 802). 4. Hylambates johnstoni, Blgr (p. 803). 9. Contributions to our Knowledge of the Plankton of the Faeroe Channel.-No. III.1 The Later Development of Arachnactis albida (M. Sars), with Notes on Arachn-actis bournei (sp. n.). By G. H E R B E R T FOWLER, B.A., Ph.D., Assistant Professor of Zoology, University College, London. [Received June 15, 1897.] (Plate XLVII.) ARACHNACTIS ALBIDA (M. Sars). This beautiful floating Actinian was originally described by Michael Sars in 1846 (loc. cit. infra); it has since been taken on several occasions, and has received quite a large amount of attention. The recorded occurrences and the references to descriptions are most simply put in tabular form. They all refer to surface captures, often in company with shoals of Salpce. 1 For Part I. see P. Z. S. 1896, p. 991; Part II, antea, p. 523, |
