2 Qen. Sub, 
I. GENERAL SUBJECTS. 
[1905] 
INTRODUCTION. 
The number of titles this year is 786, being about 200 less than last year. 
This diminution is probably chiefly due to a more rigid exclusion of 
papers that are included in our special Records, and of those Plankton 
papers, the interest of which is chiefly faunistic. 
RAdl (567) gives us the first part of a history of biological theory in 
modern times. He, however, really starts with Aristotle, and the portion 
before us of the work extends only to Lamarck. It is an useful and well 
executed work. 
In text-books, we record the completion of Grobben’s edition of Claus 
(272) and the second volume of Sedgwick’s work (654). Both works are 
highly spoken of. 
The general work of Father Wasmann recorded last year [Zool. Rec, 
1904, Gen. Sub. Title 919] has given rise to a polemic in which the 
scientific position is excellently stated by Prof. Forel (229). Wasmann 
replies in (740). 
Giglio-Tos (257) has published the third part of his work dealing with 
the most difficult subjects of biology. It is devoted to fecundation and 
heredity. He considers all the cytological processes in ontogeny as forms 
of “ biomolecular addition. 55 
Crampton (147) suggests a theory of adaptation and selection. In 
Physiology we have the republication in book form of 38 memoirs by 
Prof. Jacques Loeb (419). 
The present state of the physiology of sex differentiation is lucidly 
discussed by R. Hertwig (318) and Schaudinn (615), whose decease is so 
widely regretted, has given a concise sketch of sex-processes in Protozoa 
and a diagrammatic demonstration of the nuclear changes. 
The works on heredity are again very numerous, and amongst many 
others include a hypothesis as to its nature by Hatschek (296) ; the 
relation of chromosomes to heredity, Heider (301) ; and general reviews 
of the subject by Strasburger (686) and by Ziegler (782). 
Hill (324) calls fresh attention to the extraordinary nature of the 
maturation phenomena in Alcyonium. 
Miss Stevens (680) informs us that in the parthenogenetic generation 
of Aphis reduction in the number of chromosomes is dispensed with. 
Conklin (143) finds that, in Ascidian eggs, isolated blastomeres do not 
give rise to a whole embryo but only to those parts of a larva that would 
arise from them in normal conditions. 
Wierzejski’s work (756) on the embryology of Physa appears to be of 
considerable importance as a study of the earliest organogeny. His view 
as to the light cell-lineage throws on organ-formation is opposed to that of 
Conklin for Ascidians. 
McClung has a paper (463) on the accessory chromosome of Orthoptera , 
in which he discusses the relations of chromosomes to heredity and Mendel’s 
lav\ 7 s; and Wilson’s papers (759-761) on chromosomes of other insects are 
interesting and important. 
Child (120) informs us, as the result of regeneration experiments, that 
regulation of form is a problem of development ; and that with regard to 
heredity and morphogenesis physiological conceptions must be substituted 
for morphological. 
