ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 975 



fission ; this is a rare mode of increase among the Suctoria, but common 

 among the Ciliata. 



The author is of opinion that the existence of this intermediate form 

 furnishes a fresh argument in support of the opinion already maintained 

 by some naturalists that the Acinetee are modified Ciliata. 



Parasitic Protozoa.* — Prof. B. Grassi communicates a number of 

 morphological and systematic notes on parasitic Protozoa which he has 

 studied. (1) What he had described as " Monere " (?), Fisch has rein- 

 vestigated and established as Grassia ranarum. (2) Against Danilewsky 

 and Biitschli, Grassi maintains the integrity of his genus Paramecioides. 

 (3) He proceeds to consider the morphological features of Monocerco- 

 monas, Cimsenomonas (Trichomonas), Trichomonas Grassi, Plagiomonas, 

 and Amoeba coli. (4) After criticizing Biitschli's classification and 

 nomenclature, the author submits his own : — 



Fam. Ceecomonadinea Kent emend. 



Gen. 1. Herpetomonas Kent emend. (Syn. Monomita Grassi.) 

 „ 2. Trypanosoma Gruby. 



„ 3. Paramecioides Grassi. (Syn. Paramecium, Wedl, 1850.) 

 „ 4. Plagiomonas Grassi, 1882. (Syn. Cystomonas E. Blanchard, 



1886.) 

 „ 5. Bodo Ehr. (Syn. Heteromita Duj.). 

 „ 6. Monocercomonas Grassi. (Syn. Trichomastix Bloch.) 

 „ 7. Cimsenomonas Grassi. (Syn. Trichomonas Donne.) 

 „ 8. Costifera Grassi, 1887. (Syn. Polymastix ? Biitschli.) 

 „ 9. Dicercomonas Grassi. (Syn. Hexamita Duj., Giardia Kiinst.) 



Fam. Megastomidea Grassi, 1882. (Syn. Poltmastigina Biitschli, 1883). 



Gen. 10. Megastoma Grassi. (Syn. Cercomonas Lambl, 1859 ; Lamhlia 

 E. Blanch., 1886.) 



Fam. LoPHOMONADiDEA Grassi. 



Gen. 11. Lophomonas Stein. 

 „ 12. Joenia Grassi. 



The author then gives a useful short summary of the diagnostic 

 characters of the above twelve genera ; and concludes his memoir with 

 some special observations on Megastoma, Trichomonas hominis Dav., and 

 Amoeba coli. 



Protozoa found in the Stomach of Euminants.t — Herr A. Schuberg 

 obtains fluid from the rumen of freshly slaughtered oxen and sheep 

 without taking any more precautions than collecting the juice in a test- 

 tube and keeping it warm in the breast pocket. On reaching home the 

 tubes are placed in an incubator at 35°-36° whereby the Protozoa were 

 kept alive for about a day, their death probably being due to the decom- 

 position of the gastric juice. The animals may be obtained still more 

 simply from particles of food taken from the mouths of ruminants. 

 Living parasites must be examined on a hot stage, and their movements 

 last longest at temperatures between 30° and 35° in filtered gastric juice. 



* Atti R. Accad. Lincei — Rend., iv. (1S8S) pp. 5-12. 

 t Zool. Jalirb. (Spengel), iii. (1888) pp. 365-418 (2 pis.). 



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