For. 3 
[1921] III. Porifera or Spongida. 
DEVELOPMENT AND REPRO- 
DUCTION. 
Regeneration, etc. — Huxley, 6 & 7. 
Larval Development. — Allemand- 
Martin, 1. 
ETHOLOGY. 
[Vacant.] 
VARIATION, PHYLOGENY. 
Evolution. — Dendy, 4. 
DISTRIBUTION (GEOGRAPHY). 
1. Recent (Geographical.) 
Europe. — Stephens, 13. 
Atlantic. — George & Wilson, 5 ; 
Willey & Huntsman, 15. 
Arctic. — Brondsted, 3. 
2. Fossil (Geological.) 
Tertiary. — Bell, 2 ; he Stefani, 12. 
Secondary. — Oppliger, 9 & 10. 
III.— SYSTEMATIC. 
CALCAREA. 
[Vacant.] 
NON-CALCAREA. 
Sponges, Beaufort Harbour (N. Caro- 
lina) and vicinity, George & Wilson 
Bull. U.S. Fisheries Bureau 36 pp. 129- 
179 pis. lvi-lxvi. 
(a) Myxospongida. 
[Vacant.] 
(b) Hexactinellida. 
t Craticularia rugatum sp. n., Jura, 
Oppliger Actes Soc. Helvet. sci. nat. 
101 p. 204. 
f Discophyma radiata sp. n., Jura, 
Oppliger T.c. p. 204. 
Polya nom. nov. for Polylophus F. E. 
Sch. praeocc., Stechow Ardh. Natur- 
gesch. 87 Abth. A. H. 3 p. 263. 
Rhabdocalyptus arcticus sp. n., Green- 
land, Brondsted Meddel. Gronland 43 
p. 477 pi. xxv, pi. xxvi figs. 1-7. 
(c) Tetraxonida. 
(i) Homosclerophora. 
[Vacant.] 
(ii) Astrotetraxonida. 
Poterion allantica sp. n., George & 
Wilson Bull. U.S. Fish. Bureau 36 
p. 139 pi. lvi fig. 1, pi. lxvi fig. 51. 
Spirastrella andrewsii sp. n., George 
& Wilson T.c. p. 135 id. lvi figs. 3, 6, 7, 
pi. lxvi fig. 49. 
Suberites undulatus sp. n., p. 140 
pi. lvii figs. 8-11, pi. lxvi fig. 52, 
George & Wilson T.c. 
fiii) Siomatotetraxonida. 
Sigmatomonaxonellida, from Irish 
coasts, described, Stephens Dept. 
Agric. Ireland, Fisheries Branch Sci. 
Invest. 1920 No. II 75 pp. 6 pis. 
Acanthella corrugata sp. n. p. 161 pi. 
lxiii fig. 37, pi. lxv figs 46, 47, pi. lxvi 
fig. 56, George & Wilson Bull. U.S. 
Fish. Bureau 36. 
Axinella acanthifcra sp. n. p. 159, 
pi. lxii fig. 34, pi. lxiii figs. 38, 39, 
pi. lxvi fig. 59, George & Wilson 
T.c. 
' \Chonophiyma gen. n. perforata sp. n. 
Jura, Oppliger Actes. Soc. Helvet. sci. 
nat. 101 p. 204. 
f Cnemidiastrum expansum, lingui- 
formis spp. n. Jura, Oppliger T.c. 
p. 205. 
Esperiopsis obliqua sp. n. p. 148 pi. lx 
figs. 20-23, pi. lxvi fig. 58, George & 
Wilson Bull. U.S. Fish. Bureau 36. 
Ephydatia kalcahuensis from New 
Zealand, note on, Kirkpatrick Ann. 
Mag. Nat. Hist. ser. 9 8 p. 400 1 text- 
fig- 
Halichondna tenuispiculata sp. n., 
Greenland, Brondsted Meddel. Gron- 
land 43 p. 479, pi. xxvi fig. 8. 
liigginsia pyriformis sp. n. Green- 
land, Brondsted T.c. p. 481 pi. xxvi 
figs. 9 & 10. 
t Hyaloderma gen. n. porata sp. n., 
Jura, Oppliger Actes Soc. Helvet. sci. 
nat. 101 p. 204. 
t Hyalotragos nodosa sp. n., Jura, 
Oppliger T.c. p. 205. 
