10 Spong. 
XVII. SPONGIiE. 
[1904] 
D. Bionomics. 
Similarity of external appearance between certain Doris and Sponges : 
Cuenot (7) p. 4. — Actinians commensal on sponges : Duerden (9). — Mol- 
luscan eggs contained in tissues of sponges and destruction of mollusc shells 
by acid secreted by a siliceous sponge : Gruvel (15). — Pearls originated by 
boring sponges, such as Clione : Herdman (17). — Development of Cal- 
careous Sponges in water deprived of calcium salts ; Maas (31, 32). — 
Influence of local conditions on coloration of sponges, remarks on : Topsent 
(50) p. 17. — Mutual attachment of deep-sea Hexactinellids : Wilson (60) 
pp. 43, 60, 61. 
E. Reproduction and Development. 
(i) Germ-Cells , Fertilization . 
Spermatogenesis and Oogenesis in sponges : Gorich (14). — Ova and 
sperm-cells of Hexactinellids : Schulze (43) pp. 215-219. 
(ii) Embryology . 
(a) General Accounts. — Brief account of sponge embryology : 
Claus & Grobben (4) p. 253. 
(b) Early stages, larvae, metamorphosis and post-larval 
development. — Porosphcera, manner of growth : Hinde (18) pp. 11- 
14. — Larva) of Vitrollula fertilis : Ijima (24) pp. 46-55. — Larva) of 
Sycandra setosa reared in water deprived of calcium salts : Maas (32). — 
Larvie of Hexactinellids : Schulze (43) pp. 215-218. — Larva) of Thoosa 
armata T. : Topsent (50) pp. 110, 111. — Development of complex Eurete 
and Farrea colonies from simple cup-like forms : Wilson (60) pp. 64, 65. 
(iii) Asexual Reproduction. 
(a) Fission and Vegetative Budding. — Budding in Acantha- 
scince , pp. 129, 143, in ii/iabdocalyptus mollis F. E. S., pp. 258, 259, in 
Scyphidium longispina, p. 22 : Ijima (24). 
(b) Germinal budding. — Origin of the larva from archseocyte- 
congeries in Vitrollula fertilis : Ijima (24) pp. 53-55. — Gemmules of 
Tetilla longipilis , n. sp. : Topsent (50) p. 98. 
F. Miscellaneous. 
Bibliography. — Record of Sponge literature for 1903 : Bibl. Zool. ix, 
pp. 9, 57, 190, 304, 423. — Titles of 27 memoirs upon sponges, with abstracts : 
Maas (33). — List of memoirs on sponges published in the years 1901, 1902, 
with summaries under different headings of the more important additions 
to scientific knowledge of the Porifera : Weltner (58). — Abstracts of 
certain sponge memoirs (1900-1904) : Lendenfeld (30). 
Technique. — Methods of displaying spicules of fossil siliceous sponges : 
Lendenfeld (29). — Methods of preparing sponges : Marpmann (35). — 
Method of preparation of calcareous spicules : Minchin (36) p. 356. 
Economics. — Full account of the Sponge fishery of Florida in 1900: 
Cobb (5). 
