Ech. 27 
BIOLOGY. II, F. 
(e) Larva of A stericis vulgaris, water- pores and prseoral lobe ; Willey 
(171) p. 253. — Metamorphosis of Bipinnaria asterigera (pp. 65-71 ), of Bra - 
chiolaria (pp. 71-74); Bury (17). 
(g) Growth stages of Luidia sarsi ; Marenzeller (104) p. 132. — 
Brephic and rieanic stages, Asterias iomidata (p. 553), Asterina fimbriata 
(p. 594), Odontaster sp. (p. 630) ; Leifoldt (84). — Neanic stages of 
Porania insignia (p. 138), senile Poraniomorpha spinulosa (p. 139) ; 
Yebiull (164). 
(v) OPHIUROIDEA : — (c) Development of axial and aboral sinus, 
ovoid gland, lacunar system, and gonads in Ophiothrix ; Russo (142). 
(d) Breeding season of Ophioscolex purpurea ; Grieg (49) p. 10. 
(e) Early stages of Amphiura squamata not abnormal as Russo says ; 
Macbride (95) p. 335. — Metamorphosis of the Pluteus ; Bury (17) 
pp. 83-86. 
(vi) CRINOIDEA (c) Position of mature gonads in palaeozoic 
genera ; Jaekel (67) p. 101. 
(e) Popular account of Antedon larva, with original figures ; Hornell 
(62) : its metamorphosis ; Bury (17) pp 86-88. — Relations of stone-canal 
and water-pore in embryo Antedon compared with those of Cystidea ; 
Jaekel (68) pp. 117 & 118. 
(g) Young of Hapalocrinus ; Jaekel (67) p. 102. — Brephic and neanic 
stages of Dadocrinus ; Koenen (81). — Parephebic characters in Actino- 
metra robustipinna ; Koehler (73) p. 290. 
(vii) Experimental investigation : — 
General, — Criticism of Driesch’s Entwicklungsmechanische Studien ; 
Garbo wski (43). 
By Crossing, — Of Sphcerechinus granularis $ and Echinus micro- 
tuberculatus £ ; Seeliger (148). — With enucleated Echinoid ova, and 
subsequent development ; Boveri (16) and Morgan (124). 
By Fragmentation, — Of Sphcerechhms ova, and measurements of dwarfed 
larvae produced ; Morgan (121). — Of ovum [of an Echinoid ?, genus and 
species not stated] and effect on development ; Loeb (85). — Of blastulae 
aud gastrulse of Echinus and study of subsequent development ; Morgan 
(123). — Isolation of blastomeres and ensuing development ; Roux (139). 
—Ditto in Strongylocentrotus ; Zoja (181). 
By Pressure and the like, — Cleavage of ovum of Echinus microtuber - 
culatus under pressure ; Ziegler (179) : ditto for E. microtuberculatus , 
Sphairechinus granularis , and 7'oxopneustes lividus ; Reinke (137a). — 
Fusion of blastomeres during cleavage under pressure in ovum of Arba- 
cia ; Graf (46). — Production of tripartite cleavage in ova of Sphcere- 
chinus ; Morgan (120). — Fusion of blastulae of Sphcerechinus and pro- 
duction of one embryo ; Morgan (119). 
By Change of Environment, — Effect of temperature, season, salinity, 
light, nutrition, products of metabolism, dissolved gases, on development, 
