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Show 1874.] MR. R. B. SHARPE ON BIRDS FROM BULAMA. 305 Fig. 12. A fully developed sphero-stellate retentive spiculum with cylindro-sub-foliate radii, magnified 530 linear. 13. A fully developed attenuato-stellate retentive spiculum, magnified 530 linear. Geodia reticulata, Bowerbank. Fig. 14 represents the type specimen parasitical on the remains of the stem of a fucus, natural size. 15. One of the fusiformi-acerate skeleton-spicula, magnified 80 linear. 16. A well-developed attenuato-patento-ternate connecting spiculum, magnified 80 linear. 17. A portion of one of the long and rather slender recurvo-ternate con-necting- spicula, magnified 80 linear. 18. A portion of one of the porrecto-ternate connecting spicula, magnified 89 linear. 19. One of the attenuato-stellate retentive spicula, magnified 530 linear. 20. A n average-sized cylindro-stellate retentive spiculum, magnified 530 linear. PLATE XLVII. Halispongia ventriculoides, Bowerbank. Fig. 1. A small but very perfect specimen of the species, with the remarkable orifice at the base of the sponge, natural size. 2. A well-formed cup-shaped specimen of the species, with a fan-shaped offset attached to its base, natural size. Halispongia Mantelli, Bowerbank. Fig. 3 represents the type specimen of the species, natural size. 4. A section of H. Mantelli at right angles to its external and internal surfaces, exhibiting the reticular structure of the skeleton with the embedded particles of sand at both surfaces: a, the external surface ; b, the internal one: magnified 60 linear. 8. On a small Collection of Birds from Bulama, one of the Bissagos Islands, W. Africa. By R. BOWDLER SHARPE, F.L.S., F.Z.S., &c, Senior Assistant, Zoological Department, British Museum. [Received April 17, 1874.] I am indebted to Major Bulger for the opportunity of examining a small collection made by his brother Lieut. Bulger in Bulama Island; and as no one has before collected in the locality, I give a short list of the species. Major Bulger has sent me the following note on the locality whence these birds come, which I cannot do better than reproduce : - "The Bissagos or Bijuga Islands lie on the west coast of Africa, between 11° 40' and 10° 50' N. lat., and 15° 30' and 16° 30' W , long., opposite the mouth of the river Bulola or Rio Grande. They form a group of about twenty islands, enclosed by a reef. Most of them are inhabited ; but some are nearly bare rock, and only visited occasionally. The largest, Marshi, is above 15 miles long. The islands Carache, Corbele, Cazegut, Gallinas, Orango, Canyabac and Bulama are much smaller. On Bulama the English formed a settlement in 1792; but it was abandoned in 1793 on account of its un- |