2 Por. 
III. Porifera or Spongida. 
[19211 
I.— TITLES. 
1. — Allemand-Martin, A. Do {’in- 
fluence des variations therm iques 
des eaux do haut-fonds sous-marins 
sur la repartition et le developpement 
des larves de Hipposponqia equina de 
Tunisie. C. R. soc. biol. Paris 85 1921 
pp. 453-455. 
2. — Bell, A. Notos on tho later 
Tertiary Invertcbrata. Ann. Rep. 
Yorkshire phil. Soc. 1920 (1921) pp. 
1-21 2 pis. 
3. — Br0ndsted, H. V. Report on the 
Porifera collected by the Denmark 
Expedition at North-East Greenland. 
Meddel. Gronland Kjobenhavn 43 1917 
pp. 473-484 pis. xxv & xxvi. 
4. — Dendy, A. The Tetraxonid 
sponge-spicule : a study in evolution. 
Acta Zool. Stockholm 2 1921 pp. 95- 
152. 
5. — George, W. C. & Wilson, H. V. 
Sponges of Beaufort (N.C.) Harbour and 
Vicinity. Bull. U.S. Bureau Fisheries 
Washington 36 1917-1918 (1921) pp. 
129-179 pis. lvi-lxvi. 
6. — Huxley, J. S. Further studies 
on restitution-bodies and free tissuo- 
culture in Sycon. Quart. Journ. Micr. 
Sci. London 65 1921 pp. 293-322 pis. 
xiii & xiv. 
7. — Huxley, J. S. Differences in 
viability in different types of regener- 
ates from dissociated sponges, with 
a note on the entry of somatic cells by 
spermatozoa. Biol. Bull. Wood’s Hole 
40 1921 pp. 127-129. 
8. — Kirkpatrick, R. Note on a fresh 
water sponge from New Zealand. 
Ann. Mag. Nat. Hist. London ser. 9 
8 1921 pp. 400 & 401. 
9. — Oppliger, F. Uber neue Jura- 
spongien. Eclogae Geol. Helvet. Bale 
1611920 pp. 133-4. 
10. — Oppliger, F. Ueber neue Jura- 
spongien. Actes Soc. Helvet. sci. nat. 
101 1920 (1921) pp. 204 & 205. ' 
11. — Stechow, E. Neue Genera und 
Species von Hydrozoen und anderen 
Evertebraten. Arch. Naturgesch. 
Berlin 87 Abth. A. H. 3 1912 pp. 248- 
265. 
12. — de Stefani, C. Silicospongie 
fossili della Liguria occidentale. Rend. 
R. Accad. Lincei Roma Ser. 5 29 Sem. 
II 1920 pp. 379-381, 30 Sem. I 1921 
pp. 103-106, 167-170, 264-268, 333- 
335, 372-375, Sem. II pp. 437-442. 
13. — Stephens, J. Sponges of the 
coast of Ireland. II. The Tetraxonida 
(concluded). Dept. Agric. Ireland 
Fisheries Branch Sci. Invest. Dublin 
1920 No. II (1921) pp. 1-75 pis. i-vi. 
14. — Top sent, E. Tethya aurantium 
(Pallas) et les fethya de Lamarck. 
Bull. Mus. Paris 1920 pp. 640-646. 
15. — Willey, A. & Huntsman, A. G. 
Faunal notes from the Atlantic bio- 
logical station (1920). Canad. Field- 
Nat. Ottawa 35 1921 pp. 1-7. 
Wilson, H. V. vide George, W. C. 
16. — Woodcock, A. M. Porifera. In : 
Zool. Rec. London 56 1919 pp. 1-4. 
II.— SUBJECT INDEX. 
GENERAL, ECONOMICS AND 
TECHNIQUE. 
Bibliography. — Woodcock, 16. 
GENERAL ANATOMY. 
Spicules. — Dendy, 4. 
PHYSIOLOGY. 
Regeneration. — Huxley, 6 & 7. 
Environmental Effects. — Allemand- 
Martin, 1. 
