TITLES. Ech. 21 
170. Whitney, N. S. A siliceous specimen of fossil Sea-urchin. Tr. 
Eastbourne Soc. iii, pp. 49-51. 
A popular account of fossilisation. 
171. Willey, A. Amphioxus and the ancestry of the Vertebrates. 
Columbia University Biological Series. ii., xiv & 316 pp., i pi. 
8vo, New York, 1894. [ Echinoderma on pp. 250-256 & 267-271. 
II, A : F, i, e : iv, b.] 
172. Wilson, E. B. Karyokinesis and the fertilization of the ovum. 
P. Boston Soc. xxvi, pp. 469-473. [Title supplied from Contents. 
II, F, iii, d. IV, 0.] 
Apparently a preliminary abstract of (183 & 184). 
173. . Archoplasm, centrosome, and chromatin in the Sea-urchin 
egg. J. Morphol. xi, pp. 443-472 & 473-478, iii pis. [II, F, iii, d.] 
Abstract by R. Fick, Zool. Centralbl. iii, pp. 191-193 (March, 1896). 
174. & Leaming, E. An atlas of the fertilization and karyokinesis 
of the ovum, viii & 32 pp., x pis. New York, 4to (Oct.). 
[il, f, iii, a.] 
Reviews, — by C. S. Minot, Science, ii, p. 695 (Nov.); Amer. 
Natural, xxix, pp. 1075 & 1076 (Dec.). 
175. & Mathews, A. P. Maturation, fertilization, and polarity in 
the Echinoderm egg. New light on the “ Quadrille of the Centers.” 
J. Morphol. x, pp. 319-342. [II, F, i, d. IV, C : D.] 
Abstract by R. Fick, Zool. Centralbl. ii, p. 265 (July). 
176. Woodward, H. B. The Jurassic rocks of Britain. Vol. v. The 
Middle and Upper Oolitic rocks of England (Yorkshire excepted). 
Mem. geol. Surv. U. K. (Dec.). [Lists of horizons and localities, 
pp. 77, 99, 102, 110, 113, 115, 137, 143, 211 & 396. Ill, B, iii, c.] 
Woodworth, W. McM. See Korschelt (82). 
ZahAlka, C. Anledon ppropa, n. sp., z pyropeveho sterku [pyrope- 
yielding gravels] u Chodoulic. Rozpr. Ceske Ak. Class II, 
vol. i, pp. 717-726, pi. i (1892). 
[This hitherto unseen publication having come to Brit. Mus. 
(Nat. Hist.) the reference 277 in Zool. Rec. 1893 can be 
corrected ; and it may be added that the paper contains a 
bibliographic list of fossil species of Antedon .] 
177. . Pasmo IX utvaru kridov^ho v okoli itipu. SB. 
Bohmisch. Ges. 1895, Nos. 8, 18, 21,43. [Ill, B, iii, b.] 
178. . Prispevek ku pozn&m kridov^ho utvaru u Jicma. SB. 
Bohmisch. Ges. 1895, No. 23. [Ill, B, iii, b.] 
