TITLES. 
Echin. 23 
198. [Ludwig, H.] Ec-hinodermen (Stachelhauter). n Klasse. Asteroidea, 
Seesterne. Bronn’s Klassen und Ordnungen des Thierreichs, ii, 
Abth. 3, Lief. 20 & 21. (Feb. 1896.) [n, B, i, d, 6, 7, 12.] 
Abstracts by Ludwig: Zool. Ccntrbl. iii, pp. 397 & 398 (June, 1896); in 
Ludwig (211). 
199. . Ueber die Exemplare des Echinaster dorice und E. tribulus 
im Turiner Museum. Boll. Mus. Torino, xi, No. 241, 3 pp. (22 
April, 1896), and SB. niederrhein. Ges. 1896, pp. 109-111. (21 Aug. 
1897.) [hi, A, ii. iv, D.] 
Abstract in Ludwig (211). 
200. . Echinodorma. Zool. Jahrcsber. for 1895 (1896), gives Lite- 
rature for 1895, and Abstracts of Chapeaux (32) in Zool. Rec. 
1893; of Crety (27), Koehler (56), Russo (106), Verrill (125) in 
Zool. Roc. 1894; of Barthels (4), Boveri (16), Bury (17), Chadwick 
(20), Chun (21), Gregorio (48), Eismond (35), Field (38), Hartlaub 
(54), Herouard (57), Hirota (60), Jaekel (67, 68), Koehler (73, 75, 
77), Leipoldt (84), Loeb (86), Ludwig (90, 92), Marenzeller (104, 
105), Morgan (120, 121, 123, 124), Reh (137), Russo (141), Schultz 
(i47), Sluiter (150-152), Vernon (163), Verrill (164), & Zittel 
(180) in Zool. Rec. 1895 ; and Ziegler (354) in present Record. 
201. . Welch o Organe sind boi den regularcn Sceigeln als Poli’scho 
Blasen zu bezeichnen? Zool. Anz. xix, pp. 517-523. (Dec. 28, 1896.) 
[ii, B, i, c, 6.] 
This is a criticism of Uexkull (331). 
Abstracts by H. Ludwig: Zool. Centrbl. iv, pp. 177 & 178 (8 March, 
1897); in Ludwig (211). 
202. . Chaetaster longipes. SB. niederrhein. Ges. 1896, pp. 52-55. 
(Jan. 12, 1897.) [iv, D.J 
Abstracts by Ludwig : Zool. Centrbl. iii, p. 429 (June); Ludwig (211). 
203. . A paper indexed independently as “Wieder einzuzichende 
Arten von Seesternen,” but originally printed as “Nachschrift boi 
der Correctur” as appendix to Ludwig (202), t. c. pp. 55 & 56. Date 
of reading, at which it was not read, Feb. 3, 1896; Date of repaged 
author’s reprint, March, 1896; Date printed on wrapper of Part, 
1896 ; Date of actual publication, kindly furnished by the Secretary, 
Dr. W. Voigt, Jan. 12, 1897. [iv, D.] 
Abstract in Ludwig (211). 
204. . Ein neuer Fall von Brutpflege bei Holothurien. Zool. Anz. 
xx, pp. 217-219. (June 28, 1897.) [ii, B, iii, a, c: F, vi, b, 4; vii.] 
Translated in Ann. Nat. Hist. (6) xx, pp. 327 & 328 (Sept. 1897). 
Abstracts: — in Nat. Sci. xi, p. 226 (Oct. 1897); in J. R,. Micr. Sci. 1897, 
p. 391 (Oct. 1897) ; by H. Ludwig, Zool. Centrbl. iv, p. 687 (18 Oct. 1897) ; 
in Ludwig, Zool. Jahresber. 1897. 
205. . Brutpflege bei P solus antarcticus. T. c. pp. 237-239. (5 July, 
1897.) [ii, B, iii, c : F, vii.] 
Translated in Ann. Nat. Hist. (6) xx, pp. 487 & 488 (Nov. 1897). 
Abstracts: — by H. Ludwig, Zool. Centrbl. iv, p. 687 (1897); by R. v. Han- 
stein, Nat. Rundschau, xii, p. 591; J. R. Micr. Soc. 1897, p. 391 (Oct.); 
in Ludwig, Zool. Jahresber. 1897. 
206. . Eine neue Schlauchschnecke aus der Leibeshohle einer ant- 
arctischen Chiridota. T. c. pp. 248 & 249. (19 July, 1897.) [n, D, viii.] 
207. . Mittheilung iiber mittelmeerische Seesterne. SB. niederrhein. 
Ges. 1896, pp. 112-114. (Aug. 21, 1897.) [n. A, iii : F, vii. iv, D.] 
Abstract in Ludwig (211). 
