biological* Verm. 23 
gasler ; Zaciiarias (266). Early development of an acoelous Turbel- 
larian, showiug that there is no tra<5B an alimentary canal at any time ; 
Gardiner. Achromatic figure in ovule of Thysanozoon ; Stricht. 
Metamorphoses and migrations of Tetrarhynchus riificollis ; Vaulle- 
Geard. Migrations of Distomum cylindraceum ; Rhumbler. Interme- 
diate hosts of liver fluke; Fielder. 
Influence of male and female pronucleus in development of Nematodes; 
Ziegler, Spemann. Variations in mitosis in Ascaris megalocephala ; 
Herla. Experimental observations on early development of Nematodes; 
Sala, zuit Strassen. Development and life history of Filaria uncinata ; 
II AM ANN. 
15. Metamerism, Variations therein, and other 
Variations. 
A study of metamerism ; Morgan. On the various theories of 
metamerism ; Cattaneo. Ratio of variability to the length of time 
an organ is acted upon in development ; Montgomery (149). Individu- 
ality of Cestodes; Braun (33) pp. 1167-1182. 
Asymmetry of sacs of alimentary canal in hepatic region of a 
Balaiioglossus ( Ptychodera ) ; Hill, J. P. 
Asymmetrical intercalation of segments and supernumary branchiae 
in Eunice ; Pruvot & Racovitza, p. 339 : in Maclovia ; Saint- Joseph, 
p. 209 : in Cestodes ; Stossich (239). 
Formation of buds from intercalated segments and in the place of 
thrown off parapodia in Syllis ramosa ; Oka (166). 
Exhibition of a bifurcated specimen of Glycera alba , Rep. Guernsey 
Soc. 1894, p. 316. Syllis alternosetosa with forked posterior end ; Saint- 
Joseph, p. 187. Double buds in Syllis ramosa , formed by injury to an 
ordinary bud ; Oka (166). Duplication of operculum in Serpala , and 
variation in its shape, and as to the side of the body on which it occurs 
when single ; Horn ell (100). Bifurcated Cestodes ; Stossich (239), 
Blanchard (22). Budding in a Nemertine ; Burger (38) p. 484. 
Duplication of proboscis in a Nemertine ; Burger (38) p. 484. Abnor- 
malities in number of marginal stylet sacs in proboscis of Nemertines ; 
Beaumont. 
Headless Cestodes ; Braun (32). Cestodes attenuated in the middle ; 
Stossich (239). Other abnormalities in Strobila ; Cholodkowsky 
(52) No. 3, Setti. Variations in number and position of genital pores 
in successive proglottids ; Stiles (237) No. 36, Cholodkowsky (52) 
No. 4, Riggenbach (188). Individual variation in number of 
ducts to the exterior of nephridia in a Nemertine ( Lineus ) ; Coe (54). 
Variations in alimentary canal of a Triclad ; Vejdovsky (252) pt. vii, 
pp. 203-205. 
Variations in formation of polar bodies ; Sala : in segmentation, of 
Nematodes ; Herla. 
