3 Par. 
Systematic. 
PHYSIOLOGY. 0611 
Environmental Effects. 
Dendy & Nicholson, 4. 
DEVELOPMENT AND GROWTH. 
0615 
Reproduction. 
Jorgensen, 8. 
ETHOLOGY. 0619 
Symbiosis. 
Gravier, 5. 
VARIATION, PHYLOGENY. 0623 
Origin of specific Characters. 
Dendy, 3. 
Phylogeny. 
Jorgensen, 8. 
DISTRIBUTION (GEOGRAPHY). 
0627 
Geographical (Recent). 
Europe. 
Carr, 2 ; Stephens, 16. 
America. 
Kindle, 9 ; Smith & Green, 15. 
Africa. 
Schouteden, 14. 
Australia. 
Hallmann, 6 & 7. 
Antarctic. 
Topsent, 17. 
Geological (Fossil). 
Primary. 
Mather, 12 ; Walcott, 18. 
III.— S YSTEMATIC. 0631 
PORIFERA, GENERAL. 
Sponges, from the 2nd French Ant- 
arctic Expedition (Charcot), with new 
forms, described ; Topsent 1917 pp. 
1-88 6 pis. 
CALC AREA. 
Grantia compressa, germ-cells, de- 
velopment, affinities of Calcarea with 
Choanoflagellates ; Jorgensen Rep- 
Dove Marine Lab. 6 pp. 26-32 1 pi. 
NON-CALCAREA. 
(a) Myxospongida. 
[Vacant.] 
(b) Ilexactinellida. 
Aulorossella rjaini Tops. p. 18 pi. v 
fig. 2, aperta Tops. p. 20 pi. iv fig. 4, 
pi. v fig. 3, Antarctic described ; Top- 
sent 2me Exped. frang. 1917. 
Gymnorossella inermis Tops., Ant- 
arctic, p. 22 pi. i fig. 1 and pi, v fig. 4 ; 
Topsent T.c. 
Bossella podagrosa Kirkp. subsp. n. 
tenuis ; p. 15; Topsent T.c. — R. raco- 
vitzae microdiscina Tops. ; Topsent T.c. 
p. 12 pi. iv fig. 10, pi. v fig. 5. 
Sarostegia oculata, Cape Verde Isles, 
symbiotic association with an Actinian 
and a Polychaete ; Gravier C.R. Acad. 
Sci. 164 pp. 333-336. 
Scolymastra joubini Tops. p. 27 pi. ii 
fig. 4, pi. v fig. 1 ; Topsent 2tne. Exped. 
frang. 1917. 
(c) Tetraxonida. 
(i) Homosclerophora, 
[Vacant.] 
(ii) AstPvOTetraxonida. 
Geodia japonica, note on spicules ; 
Bryce J. Quek. Micro'sc. Cl. (2) 13 
pp. 193 and 194. 
(iii) SlGMATOTETRAXONIDA. 
Allantella gen. n. for Trachyledania 
arbor ea, Keller ; Hallmann Proc. Linn. 
Soc. N.S.W. 41 p. 675. 
Anchinoe loxifera subsp. antarctica 
Tops. p. 43 pi. iv. fig. 5 pi. vi. fig. 5 ; 
Topsent 2me Exped. fran^. 1917. 
Axidragma gen. n. for Axinella 
padina Tops., Hallmann Proc. Linn. 
Soc. N.S.W. 41 p. 638. 
Axinetlidae, revision of genera with 
microscleres in ; Australian species 
described ; Hallmann Proc. Linn. Soc. 
N.S.W. 41 pp. 634-675 pis. xxix, xxxii, 
xxxvii, and xxxix-xliv, p.p. 
