BIONOMICS, REPRODUCTION. 
ProL 43 
Different behaviour (as regards immobilization and agglomeration) of 
various Mammalian ana Avian sera on Trypanosoma paddce , Levaditi & 
Sevin (261). 
Cytolytic action of serum of white rat on T. paddce , Sevin (441). — 
Natural immunity of certain animals (guinea-pig, mouse) to T. paddce is 
not due to the active, cytolytic properties of their sera, but to rapid 
phagocytic digestion : of others (white rats) due in part to both causes, 
Levaditi & Sevin (262). 
Protozoa in reference to other diseases: — 
Intestinal Flagellates ( Lamblia . , Trichomonas) and diarrhoea, Castellani 
(65). 
Occurrence of “ Spirochceta ” pallida n. sp. (later Treponema n. g. 
pallidum) in true syphilitic lesions and products, probably the cause of 
this disease, Schaudinn & Hoffmann (406). — Thesing (481) apparently 
doubts not only whether “ Spirochceta ” pallida is a Protozoan, but also 
whether it is etiologically connected with syphilis. 
Siegel (445) considers that “ Guarnieri’s bodies,” as they occur in 
small-pox and vaccinia ( Cytoryctes variolce and C. vaccince) are the cause of 
those diseases ; he gives aquite different account of them, however, from that 
of Calkins (Zool. Rec. 1904, No. 58). Further, he has found similar 
parasites in foot and mouth disease (C, aphtharum n. sp,), scarlet-fever, 
C. scarlatince n. sp. (446), and also in syphilis, C. luis n. sp. (447), this last 
result being very different from those obtained by other workers. — 
“Bryocytic” maladies ; small-pox and “ Plasmodium ” variolce , Bose (32). 
Prowazek, on the other hand (364 & 365), concludes that Guarnieri’s 
bodies ( Cytoryctes ), as seen in vaccinia, are certainly not parasites. — 
Riccioli (377) also comes to the conclusion that the bodies taken by 
Siegel to represent Protozoa, and the cause of vaccinia (Guarnieri’s 
corpuscles), are really artificial products ; R. regards other bodies, found 
in the kidneys of infected rabbits, as Protozoa. 
Bodies found in, and cultivated from carcinomatous tumours, which are 
thought to be Plasmodiophorce , and dignified with a new specific name, 
P. carcinomatis , Robertson & Wade (381). — No comparison can be rightly 
made between the cell-inclusions of cancerous growths (“ Plimmer’s bodies,” 
etc.) and the Mvxamoeban parasites, Plasmodiophora brassicce, Prowazek 
( 363). — The cells of carcinoma are to be regarded as parasites “of the 
lowest animal nature,” Butlin (59). 
Occurrence of sickle-shaped formations, thought to be parasitic 
(“ Hcemamceba ” leuccemice magna), in myelsemia and leucaemia, Lowry 
(271). t ... 
The organisms known as Coccidioides immitis and C. pyogenes , causing a 
disease of man in America, and thought by Rixford and Gilchrist to be a 
kind of Sporozoan, are really pathogenic moulds (Fungi), Ophuls (327). 
D. Reproduction. 
1. Asexual: fission, schizogony, etc. 
Varieties of division of protoplasm in a multinucleate condition (i.e. 
with regard to the concurrent division of cytoplasm and nuclei), exemplified 
by Amoeba proteusy Stole (475). 
Vegetative multiplication, by plasmotomy, of Mycetosporidium n. g., 
L£ger & Hesse (251). 
Schizogony in Cocddium subepithelialis ; 8-11 merozoites, Moroff & 
Fiebiger (302); 
Schizogony described in a new Mammalian Hsemogregarine (ff. balfouri\ 
Balfour (7).— Endogenous multiplication of H . balfoilri (really schizogony ?) 
