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Mr. T. Goodey. A Contribution to our [May 19, 



(b) Systematic. — The following list of organisms includes all that it has 

 been possible to classify and name up to date. The scheme adopted is 

 simple, all the different families, sub-families, etc., to which any particular 

 organism belongs are not given. 



It must not be supposed that all the forms have been found in any one 

 culture ; some cultures may yield a large number of different species, whilst 

 others give only a few. Some species, e.g., Cercomonas and Colpoda cucullus 

 and Col. steinii, are very commonly met with, whilst others only occasionally 

 occur. Notes have been added to the different species tabulated, indicating 

 their abundance, etc. 



Class. — Mastigophora (Dies). 



Order. — Protomonadina (Blochmann). 



1. Cercomonas sp.? (Duj. em. Biitschli). (PL 4, fig. 1.) 



2. Dimorpha radiata (Klebs). 1 



These forms have two flagella arising from the nuclear area ; they ingest food by 

 amoeboid movement and are very common, occurring in practically all cultures and from 

 all soils. 



3. Oicomonas (Kent), two species, one much larger than the other, occasionally found. 



4. Bodo lens (Ehrb.), has occurred in a few cultures, from a pasture soil. 



Order. — Euglenoidena. 



5. Anisonema sulcatum (Duj.), found in culture from one particular soil. 



Family. — Choanoflagellidse (Stein). 



6. Codosiga botrytis (Ehrb.), only seen on one occasion, in a culture from a pasture soil. 

 Two other flagellates have been encountered, but so far it has not been possible to 



classify them. 



Class. — Bhizopoda (von Siebold). 

 Order. — Lobosa. 



7. Amoeba " Umax" (PL 4, fig. 2). 



The amoebae found are all placed provisionally in the " Umax" group on account of their 

 size, and lobose pseudopodia. They are of frequent occurrence and vary considerably in 

 size ; some are 8 — 10 /n in diameter, others 20 — 40 p, whilst one form reached 100 /t in 

 length. Before these can be definitely named according to their particular species, it 

 will be necessary to work out the structure of the nucleus and to follow the nuclear 

 changes in division, etc. The recent work of Nagler (loc. cit.) and others on different 

 amoebae of the "limax" group shows this to be essential. 

 Order. — Monothalamia (M. Schultze). 



8. Arcella vulgaris (Ehrb.), in an old culture of sewage soil. 



9. Dijflugia globulosa (Duj.), shell built up of cells of dead algas, in an old culture of 



sewage soil. 



10. Trinema enchelys (Ehrb.), in an old culture of a manured arable soil. 



11. Order. — Mycetozoa ; numerous active zoospores have been encountered in a few 



cultures, from arable, pasture, and garden soils. 

 Class.— Ciliata. 

 Order.— Holotricha (Stein.). 



12. Spathidium spatkula, only occasionally found, from manured arable soil. 



