titles, biological. Verm. 21 
264. •Willach, — . Distomenbrufc in den Lungen des Pferdes. Arch, 
f. Tierheilk. xviii, p. 118 
265. . Monostoma hepaticum suis. Arch. f. wiss. u. prakt Tierheilk. 
1893, Heft 1 & 2, pp. 40-42. Criticised by Braun in Centrbl. 
Parasit. xv (1894), p. 874. 
New subspecies, shown by Braun to be stage in development of Cysti- 
cercus tenuicollis. 
266. Wilson, E. B. Amphioxus and the Mosaic theory of development. 
J. Morphol. viii, pp. 579-617. 
Comparison of cleavage and germ-layers in Annelids and Chordates. 
267. Woodward, M. F. Further Observations on Yariations in the 
Genitalia of British Earthworms. P. Zool. Soc. London, 1893, 
pp. 319-324, pi. xxiv. 
268. Zaciiarias, 0. Fauna des grossen Ploner S?es. Forschungs- 
berichte aus der Biologischen Station zu Plon, i. Berlin (Fried- 
lander & Sohn) : 1893, pp. 25 & 26, and Biol. Centralbl. xiii, 
pp. 377-382. 
269. Zoja, R. Contribuzione alio studio delle sostanze cromatofile 
nucleari di Auerbach. I. In alcuni ciliati ; n. nella ovogenesi e 
nella fecondazione dell’ Ascaris megalocephala ; ill. nelle uova 
partengenetiche dell’ Aphis rosce. Boll, scient. xv, pp. 50-60, & 
65-69. 
L— BIOLOGICAL. 
1. General. 
Spengel’s monograph on the Enteropneusta (231) deals with the mor- 
phology and ontogeny of the group. 
Anatomy aud histology of Sipunculus indicus ; Fischer (87), 
Shipley (222): of Ophryotrocha puerilis ; Korschelt (136), Braem 
(39) : of Syllids ; Malaquin (162). Preliminary account of a new and 
aberrant SahellUl ; Giard ^94). Anatomy of Enchytrceids ; Hesse (116): 
of new genera and species of Oligocholia ; Beddard (7, 8), Eisen (83, 
84), and Beniiam (11, 12) : of Sutroa ; Beddard (9) : of Leeches ; 
Leuckart (143), pp. 535-73 1. 
Anatomy and histology of Scandinavian Cestodes ; LOnnberg (153) : 
of Tcenia ursina , n. sp. ; V. Linstow (149) : of OaryophylUcus mutabilis ; 
Will (263): of Trematodes (3 species of Monostomum) ; Walter (253): 
of Distomum clavigerum ; Noack (186). Anatomy and physiology of 
Bilharzia\ Brock (47). Anatomy of Exotic Nemertines ; BurgeR (55). 
Anatomy and histology of Emea lacustris ; DU Plessis (196). Anatomy 
of Turbellarians of Black Sea ; P^iieyaslawzewa (193) : of a curious 
Turbellarian which cannot be classed decidedly with either Dendrocoels 
or Rhabdocoels ; C ha pit is (66). 
