44 Prot. 
XVIII. PROTOZOA. 
that their “ evolutive 55 forms in the cells and tissues of the host are identical 
with the cell-inclusions in cancer and “ clavelee.” 
Ruge (325) compares syphilis with malaria, and is of the opinion that 
the cause is a parasitic Protozoan. 
Relation between malaria and cancer, and racial distinctions, Kruse 
( i82). 
Laver an (194) very much doubts a Haematozoon being the cause ot 
yellow fever. He has not found any Haematozoa in the blood of patients 
suffering only from this disease. 
A case of “ molluscum contagiosum” (an epidermal malady) caused by 
a Protozoan (?) parasite in Discoglossus , an Amphibian, Mingazzini (263). 
D. Reproduction. 
1. Asexual: fission, schizogony, etc. 
Sporangium and spore-formation in Dictydium ; the spores do not 
appear to germinate, neither amcebulae nor flagellate swarm-spores being 
known, Jahn (166).—Endogenous occurrence of embryonic Amoebae in 
Pelomyxa vivipara described by Penard (289), who is inclined to regard 
them as being formed from the “refringent bodies. 5 ’—Reproduction of 
Acanthometridce in two ways, (a) by spore-formation and (6) by budding, 
resulting in the production of two kinds of young forms:—from (a) large, 
uninuclear forms, with a well-developed skeleton, and from ( b ) small, 
multinuclear ones, with, at most, a very slightly developed skeleton, 
Porta (294). 
Peculiar colony-formation in Thalassophysa pelagica and T. sanguino- 
lenta , commencing with rapid multiple nuclear division, amoeboid changes 
in shape, and elongation of the central-capsular mass, accompanied by 
extension of the gelatinous layer; Anally the now almost filiform central 
capsule, breaks up into pieces, of which there are at length several 
hundreds, around each of which, portions of the extra-capsular plasma 
and yellow cells arrange themselves. A “polyzoic” colony thus formed 
(which greatly resembles one of Collozoum pelagicum ) may further break 
up into smaller colonies of varying size. Each individual has (usually) 
many nuclei, a central oildrop, an assortment of “ yellow cells,” and sends 
out pseudopodia on all sides which are in contact with those of other 
individuals and with the vacuolar walls. The individuals are slightlv 
dimorphic. The process is held to replace both kinds of swarm-spore 
formation, and to represent a particular adaptation to life at the surface 
of the sea, since the jelly and extra-capsular mass are retained till the 
young individuals eventually pass out, Brandt (41). 
Berndt (19), thinks that possibly Gregarines in the gut of Tenebrio 
molitor (larva), possess some method of endogenous multiplication. 
Noteworthy in the schizogony of Caryotropha mes?iilii, is the formation 
of many “ schizontocytes” each of which gives rise to a “bardlet 55 of 
merozoites; hence several bardlets are formed in one schizont, Siedlecki 
(358).—Schizogony in: Coccidium schubergi, of the rosette kind, with 
formation of indifferent merozoites, Schaudinn (334); C. faurei n. sp., 
the merozoites are far more numerous than in C. oviforme , Moussu & 
Marotel (268); C. oviforme , where two forms of merozoites described, 
probably, however, not [?] a result of precocious sexual differentiation, 
Tyzzer (395).—In Cydospora caryolytica, the schizonts are sexually differ¬ 
entiated extremely early, and give rise to male and female merozoites, 
Schaudinn (335): also in Adelea ovata , Siedlecki (359a). 
Schizogony of: Legerella testicidi, Cuenot (75); Laverania malarice, 
Maurer (250); Lankesterella minima , Hintze (159). 
Encystment in a blood-corpuscle (cytocyst) and “sporulation” [probably 
