2 Gen. Sub. 
I. GENERAL SUBJECTS. 
INTRODUCTION. 
Following the order of the subject-index we may first note the continua¬ 
tion of Bronx’s “Thierreich” (78), a further instalment of Ray Lankester’s 
Treatise on Zoology (365), ;1fid the second volume of the revised edition of 
Gegenbaur’s Comparative Anatomy (237). 
Important general essays are those of Bateson (34), Pearson (508), 
Radl (549), Driesch (144), Reinke (576), and there are many others. 
Sir Michael Foster’s history of physiology in the 16th, 17th, and 18th 
centuries (201) occupies a foremost place among the historical studies, but 
we would also note Mrs Ogilvie-Gordon’s translation of Zittel’s history 
of palaeontology and geology (726), and Packard’s account of Lamarck 
and his work (499). 
Concerning distribution, we may especially mention the works of 
Kobelt (349), Newbigin (477), Ferronni^re (180), and Voigt (686). 
General morphological memoirs are well represented by those of Dohrn 
(142), and Rabl (547) ; and general physiological works by D’Arsonval 
and others (128), Driesch (144), Dubois & Couvreur (159). 
Butschli (84 & 85) continues his study of the intricacies of plasmic 
structure, and there are several other interesting investigations of the 
same general character by Golgi (256) and others. Papers dealing with 
the centrosome continue to be numerous. Gallardo (219) offers a new 
interpretation of karyokinetic figures. 
The section on germ-cells includes Boveri’s study on the polarity of the 
sea-urchin ovum (72), a theory of the corpus luteum, Fraenkel & Cohn 
(211), many studies on spermatozoa by Prowazek (537), Broman (77), 
McClung (408), Loisel (395), Regaud (569), and others. Noteworthy 
are the researches on artificial parthenogenesis by Loeb (385), Delage (133), 
Matthews (427), Wilson (711), and others. 
Theoretical embryology is represented by such essays as those of 
Driesch (144). Herbst (288), and Roux (592). The co-operative treatise 
on embryology, edited by Oscar Hertwig (293a), promises to be a monu¬ 
mental work. A neat piece of concrete research will be found in Rosner’s 
paper on the origin of monochorial twins (590). The number of papers 
describing embryological experiments is again large, and reference may be 
made to those of Delage (134), Morgan (462), and Wilson (712). 
In the section Reproduction and Sex, we note Ewart’s experiments (175), 
the new edition of ‘ The Evolution of Sex ’ (236), Rorig’s study of antlers 
(583), and the re-discovery of Mendel’s law (436). Recent work on 
regeneration is summed up in Morgan’s treatise (457), and there are 
important special studies by Przibram (540), Herbst (287), Tornier (659), 
Wolff (718), and several others. 
Among the contributions to the theory of heredity, we may notice 
especially those of Adami (1), Bateson (34), Ewart (175), Pearson (510, 
etc.) ; and among more special investigations Kennel’s story of a 
curtailed cat is particularly interesting (338). The Lamarckian position 
is well represented by Costantin’s book (112). 
In the year’s evolution-literature, the foremost place must be given to 
the work of De Vries (137), and to the re-discovery of Mendel’s paper 
(436) of 1865. The number of variation-statistic papers is on the increase, 
e.g. Browne (80), Camerano (92), Pearson (506, etc.), Ludwig (403a). 
Ewart’s work (175-177) also claims attention, and the appearance of 
Biometrika (735) is an event in itself. In regard to Natural Selection the 
most important papers are those by Weldon (704a) and Beeton & 
Pearson (40a). 
