5-i SUMMARY OF CURRENT RESEARCHES RELATING TO 



Myxosporidia in Spinal Cord of Trout.* — A. Schuberg and 0. 

 Schroder describe from the brook trout a new species of Mijxoholus. 

 It occurred in the peripheral nerves and spinal cord. The cysts are 

 mostly long, "9 mm. by "2 mm. and lie always between the sheath of 

 Schwann and the medullary sheath of the nerve fibres. The spores 

 measure 10-12 /a by 8/a by 6/x. In the same trout was found in the 

 connective tissue beneath the dorsal fin an example of a species of 

 Hennegnya whose spore plasma exhibited one nucleus only. 



Nosema in Shore-Crab. f—Ch. Perez finds a species of Nosema very 

 abundant throughout the musculature (excepting the heart) of Carcinus 

 mmnas. In the same animal and in the same tissues he recently found 

 the Microsporidian Theloliania mcenadls, but in several thousand crabs 

 he found only one in which the two parasites were present together. 



New Glugea in Acorn-Shell. | — Ch. Perez describes Glugea stempelJi 

 sp. n., abundant in Baki)iiis amaryUls. Its life-history is similar to 

 that of Ghigea anomaJa Mon. Very characteristic is the successive 

 sporulation in the interior of a large trophozoite with budding nuclei. 



Nucleus of Ag'greg'ata.§ — Th. Moroff discusses the peculiar digenetic 

 Gregarines belonging to Frenzel's genus Aggregata, which have their 

 asexual development in the intestine of various crabs and their sexual 

 stages in the intestine of Cephalopods. A remarkable feature is the 

 variety in the division of the nucleus, for no fewer than seven modes 

 are reported — possibly characteristic of different species. In most cases 

 the divisions of the nucleus take place below the surface of the parasite ; 

 thereafter the nuclei project on the surface covered by a thin plasmic 

 layer. 



* Arch. f. Protistenk., vi. (1905) pp. 47-60 (1 pi.), 

 t Proc. Verb. Soc. Sci. Bordeaux, 1904-5, pp. 16-18. 

 X Tom. cit., pp. 28-y. 

 § Zool. Anzeig., xxxi. (1906) pp. 72-8. 



-4-4^^ 



I 





