TITLES. 
Echin. 33 
Review: by J. Lambert, Rev. paleozool. viii, pp. 53-55 (Jan. 
1904). 
284. SCHAPIRO, J. Ueber den Anfcagonismus zwischen Hermaphrodi- 
tismus und Differenzierung, sowie ueber einige, dieses Thema 
beriihrende Fragen. Biol. Centrbl. xxiii, pp. 370-387, 500-510. 
(15 May, 15 July.) [n, A, i.] 
285. SCHARDT, H. & DUBOIS, A : Description geologique de la region 
des Gorges de l’Areuse (Jura neuchfltelois). Eclog. geol. Helvet. 
vii, pp. 307-476, pis. xi-xv, 20 text-figg. (April.) 
[in, B, iii, b, 2 ; e, 1, 2, 8.] 
SCHLUETER, C. (252) Zool. Rec. 1902. Abstract by [A.] Torn- 
quist, N. Jahrb. Min. 1903, i, p. -530-. 
286. SCHNEE, — . Einige Bemerkungen ueber die Tierwelt der Litoral- 
region von Jaluit. Zeitschr. Naturw. lxxv, pp. 373-384. [hi, A, iv.] 
287. SCHUCHERT, C. On the Lower Devonic and Ontario formations 
of Maryland. P. U. S. Mus. xxvi, pp. 413-424. (Feb.) [hi, b, iv, g.] 
288. . The I. H. Harris Collection of invertebrate fossils in the 
Uni, ted States National Museum. Amer. Geol. xxxi, pp. 131-135, 
pi. xi. (March.) [n, e, i, c.] 
289. . On new Siluric Cystoidea, and a new Gamarocrinus. Amer. 
Geol. xxxii, pp. 230-240. (Oct.) [hi, b, iv, g. iv, f, g.] 
Abstract: by J. Lambert in Rev. paleozool. viii, p. 127 (April, 
1904). 
290. SCHUECKING, A. Zur Physiologie der Befruchtung, Partheno- 
genese und Entwicklung. Arch. ges. Physiol, xcvii, pp. 58-97, pi. i. 
(16 June.) (Also Zentrlbl. Gynak. xxvii, pp. 597-600.) 
[n, f, iv, viii.] 
Abstracts: J. R. Micr. Soc. 1904, p. 311 (June); in Ludwig (205). 
291. . Zur Erwiderung auf die Bemerkungen von E. von Dungern. 
Arch. ges. Physiol, xcix, pp. 634-636. (11 Nov.) [ii, f, iv; viii.] 
292. SllGUIN, [C.] Description de l’apex du Cidaris elegans (Munster in 
Goldfuss). Feuille Natural, xxxiii, pp. 199, 200, 1 text-fig. (1 Aug.) 
[ii, b> b c, 5.) 
SHERBORN, C. D. See Rowe (276). 
SIEDLECKI, M. See Caullery (28). 
293. SIEMIRADZKI, J. v. Geologia ziem Polskich. Tom i. Formacye 
Starsze do Jurajskiej wlgicznie (Geology of Poland. I. Account of 
the formations to the top of the Jurassic). 8vo, 472 pp. Lemberg : 
Muzeum Dzieduszyckich. [hi, b, iii, c, e; iv, d, f, g.] 
Abstract by Author, Yerh. geol. Reichsanst. 1904, pp. 119-122. 
294. SIMPSON, J. Catalogue of echinoderms found at Aberdeen and 
neighbourhood. Tr. Aberdeen Working Men’s Nat. Hist. Soc. 
1901-1902, No. 1, pp. 39-43. 
[ii, b, ii, a ; c ; d, 1 : D, iii, e, f. ill, a, ii.] 
295. SKEATS, E. W. The chemical composition of limestones from 
upraised coral islands, with notes on their microscopical structures. 
Bull. Mus. Harvard, xlii ( = Geol. Ser. vi), pp. 53-126, 10 text-figg. 
(June.) [ii, d, x.] 
296. SOLLAS, W. J. A method for the investigation of fossils by serial 
sections. Phil. Trans. (B) cxcvi, pp. 259-265. (14 Nov.) [n, E, i, b.] 
For prelim, notice, see (263) Zool. Rec. 1902. 
SPRINGER, F. (290) Zool. Rec. 1901. Abstract : by T. W. 
Stanton, Geol. Centrbl. iv, p. 124 (15 Sept. 1903). 
