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Show 1903.] ON THE MARINE FAUNA OF ZANZIBAR. 129 five upper labials, second and third entering the eye; three labials in contact with the anterior chin-shields, which are larger than the posterior. Scales in 15 rows. Ventrals 261 ; anal entire; subcaudals 25 pairs; tail ending in a compressed, obtusely pointed scute, which is obtusely keeled above. Blackish brown above; traces of a yellowish nuchal collar; upper lip white ; two outer rows of scales white, each scale with a blackish central spot; ventrals a.rrd subcaudals white, with a black spot on each side, some of the ventrals with an interrupted blackish border. Total length 610 millim. ; tail 40. A single female specimen from Dinawa, Owen Stanley Range, 4000 feet, collected by Mr. A. E. Pratt. The genus Toxicocalamus was established by me in 1896 (Ann. & Mag. N. H. [6] xviii. p. 152), for a Snake from Woodlark Island, British New Guinea, T. longissimus, here figured (PI. XIII. fig. 2), which differs from the one now described in the numbers of scales and shields (Sc. 17; V. 299-305; A. 2; C. 30-31), in the smaller eye, in the shorter internasals and frontal, in the proportions of the upper labials, of which the third and fourth enter the eye, and in the coloration. EXPLANATION OP THE PLATES. PLATE XII. Fig. 1. Lygosoma milnense, p. 125, male, natural size. 2. Lygosoma granulatum, p. 126, natural size. 2 a. „ „ Upper view of head, X 2. 3. Lygosoma pulchrum, p. 127, natural size. 3 a. „ „ Upper view of head, X 2|. PLATE XIII. Fig. 1. Lygosoma pratti, p. 128. Figs. 2,2 a, 2 b. Toxicocalamus longissimus, p. 128. Upper, side, and lower views of head and anterior part of body. 3,3 a, 3 b. Toxicocalamus stanleyanus, p. 129. Upper, side, and lower views of head and anterior part of body. All natural size. 4. On the Marine Fauna of Zanzibar and British East Africa, from Collections made by Cyril Crossland in the Years 1901 and 1902.-Polychasta. Part II. By CYRIL CROSSLAND, B.A., B.Sc* [Received May 25,1903.J (Plates XIV. & XV.t, and Text-figures 12-15.) PART II.-THE EUNICID^E. Before beginning my examination of the typical Nereidiform (i e. Errant) Polychsetes, I investigated to some extent the variability of those characters usually employed for specific * Communicated by Prof. W . C. MCINTOSH, F.R.S., C.M.Z.S. f For explanation of the Plates, see p. 141. PROC. ZOOL. Soc-1903, VOL. II. No. IX. 9 |