188 .SUMMARY OF CI'KKKNT KKSKAKi IIKS RELATING TO 



Leucocytozoon of Red Grouse.* — C. G. Seligmanrj and Louis W. 

 Sambon publish a preliminary note on Leucocytozoon lovati sp. n. from 

 the blood of Lagopus scoticm. Only the fully grown sexually differen- 

 tiated sporonts have been observed, and these are briefly described. 

 They are contained in oval or spindle-shaped elements, with the ex- 

 tremities usually drawn out into fine long threads not unlike flagella. 

 These elements appear to be blood-cells greatly altered by the parasites 

 they inclose. The infected bird was not considered to have suffered 

 from " grouse disease." 



New Sporozoon in Toad.f — Helen Dean King describes Bertramin 

 oufonis sp. n. from Bidder's organ in the common American toad Bufo 

 lentiginosiis, and points out that the bodies Knappe described in 1880 

 as spermatozoa in this organ are probably stages in the life-cycle of 

 Bertramia. Bidder's organ is undoubtedly a rudimentary ovary, and in 

 the light of our present knowledge regarding the origin and develop- 

 ment of germ-cells, it is inconceivable that functional spermatozoa could 

 be formed in and from the cytoplasm of rudimentary ova that are 

 destined to undergo degeneration. 



Sporozoan Parasites of Fishes. J — James Johnstone records a heavy 

 infection of the skin of the sole with Lymphocystis johnstoni. The 

 cysts are colourless, very opaque, and easily discernible to the naked eye. 

 and of average diameter 0'32 mm. An account is also given of a 

 Myxosporidian invasion of the cartilaginous layer of the sclerotic in 

 Gadus esmarlrii, H. M. Woodock has examined preparations of the 

 cysts, and describes the spores ; he concludes that there is here a new 

 species of Myxobolus, distinguished by the size of the spores. It is 

 the first Myxosporidian recorded for the Gadidas. He proposes the 

 name Myxobolus esmarhii sp. n. 



Sarcosporidian in Parakeets. §— G. S. Graham-Smith describes the 

 cysts and spores of a presumed Protozoon parasite from the heart, 

 gizzard, and other muscles of young parakeets (Psittacus undulatus). 

 Injection of cyst material into the abdominal cavity, and feeding 

 experiments failed to infect adults, although naturally infected young 

 forms died. The parasite, though differing in many respects, more 

 closely resembles Bhinosporidium kinecdyi than any other cyst-producing 

 protozoon. 



Sarcosporidial Infection in Mice.|| — L. Negre has experimented 

 on this subject. He finds that young mice are more easily infected 

 than old ; 45 days elapse between ingestion of spores and the appear- 

 ance of the parasites in the muscles ; 80 to 90 days elapse from the time 

 of infection until the spores possess maximum infecting power. At the 

 beginning of infection the parasites in the abdominal muscles are more 

 developed than those elsewhere ; when the infection is slight they are 

 most numerous in the abdominal muscles. Inoculation by skin or 



* Lancet, 1907, ii. pp. 829-30 (3 figs.) 

 t Proc. Acad. Nat. Sci. Philadelphia, 1907, pp. 273-8. 



% Proc. and Trans. Liverpool Biol. Soc, xxi. (1907) pp. 295-8, 304-8 (1 pi. and 

 1 fig.). § Journ. Hygiene, vii. (1907) pp. 552-7 (2 pis.). 



|l O.R. Soc. Biol. Paris, lxiii. (1907) pp. 374-5. 



