44 Ed tin. 
XIV. ECHINODEEMA. 
7. Alleged schizocoels in mesenchyme of Asterias pallida ; Mac- 
Bride (164) p. 50. 
e. Ophiuroidea :—Vacant. 
f. Crinoidea :— 
12. Origin and relations to aboral [? axial] sinus and axial organ of 
genital rachis in Antedon ; Russo (204). 
g. b. Vacant. 
vii. Post-larval Growth-stages :— 
b. Holothurioidea :—Difference in colour between young and adult 
Synapta godefroyi ; Bedford (29) p. 847. 
c. Echinoidea :—Differences of form and apical system according to 
age in Hemiaster cubicus; Fourtau (96) p. 628.—Addition and 
development of interambulacrals in Strongylocentrotus. Arbacia , 
Melonites , and Oligoporus (pp. 129-131, figg. 110-116), non¬ 
imbrication of morpko-brephic interambulacrals in Lepidechinus 
proves simplicity of all interambulacrals in ancestor (p. 132); 
Jackson (127). 
d. Asteroidea :—Rate of growth of Asterias up to sexual maturity 
(pp. 58, 66), brephic Asterias on sea-weed in Narragansett B. 
(p. 47); Mead (174).—Neanic Astropecten zebra ; Loriol (154) p. 9. 
e. Ophiuroidea :—Study of post-larval growifh-stages in Ophiactis 
aspemda and comparison with other 0phiolepididce and Amphiuridce , 
also in Ophiactis kroyeri , Amphiura magellanica , A. patagonica , 
and Ophiacantha vivipara\ Ludwig (159).-—Young stages of Oph. 
compared with Ophiotypa simplex ; Koehler (142) p. 3.—Brephic 
Ophiothrix angulata (pp. 19, 20), brephic and neanic Astrogomphus 
vallatus (p. 81), neanic Astrophyton muricatum (p. 84);. Verrill 
( 244).—Neanic Amphiura eugenice , A. patagonica , A. chilensis , 
differences from adult; Ludwig (157) pp. 9, 11, 12. — Young 
specimens of Ophioglypha tumulosa (p. 122), 0. plana (p. 124), 
0. divisa (p. 129), Ophiomusiurn glabrum (p. 134), 0. diomedece 
(p. 135), 0. lymani (p. 139), Amphiura diomedece (152), Ophiacantha 
inconspicua (p. 169), Asteronyx excavcita (p. 186); Lutken & 
Mortensen (162). 
f. Crinoidea :—Neanic Actinometra belli, brachia; Doederlein (77) 
p. 479.—Pentagonal and cirriferous morpho-brephic columnals in 
Metacr. rotundus and Pentacr. ( Isocr .) decorus correlated with 
morphepliebic characters of [alleged] “ancient fossil representa¬ 
tives/’ e.g. Pentacr. ( Extracr.) briareus : morpkepkebic columnals of 
Platycr. are circular, as w T ere all columnals of ancestor: morpho- 
brephic brachials of Encrinus are uniserial, but morphepliebic are 
biserial; Jackson (127) pp. 127, 128, figg. 124-127. 
g. Cystidea :—Young stages of Thecoidea (= Edrioas ter oidea ); Jaekel 
( 130) p. 28. 
viii. Developmental mechanics and Experimental Embry¬ 
ology :—Summary of 1896 papers; Endres (82). 
General discussion of segmentation and early organogeny in 
Echinoderma from fragmentary or other ova and blastulse; Driesch 
( 79).—No interaction betwuen first two blastomeres, but number of 
blastuloe derived from-a single ovum depends on the geometrical form 
impressed on the protoplasm, as experimentally shown in Ech. ovum; 
Loeb (151). — Merogonic fertilisation and hybridisation of ova of 
Echinus , Strongylocentrotus , and Sphaerechinus , with discussion of 
conclusions; Delage (67).—Discussion of Boveri and Delage; Giard 
( 104) pp. 663-665.—Criticism of Delage’s conclusions as to merogony 
(see 43, Zool. Rec. 1898, and 67, this Record); Giard (103).— 
4 Ovulase/ i.e. extract of spermatozoa of Strongylocentrotus lividus and 
