BY G. I. PLAYFAIR. 



635 



Genus Dactylosph^rium Hertw. & f.ess. 



D. RADIOSUM var. MINUTISSIMUM Playf. 

 Syn., Amoeba radiosa v. minutissima Playf., Biol. Richm. R., 

 p. 144, PI. viii., f.20. The diameter of the body, which Cash 

 gives as "usually about 30/a" for the type, is only 4-8/x in this 

 minute form, with pseudopodia extending to 20-30//. 

 Var. STELLATUM Playf. 

 Syn., Amoeba radiosa v. stellata Playf., I.e., p. 145, PI. viii., f.21. 

 Diam. of the body about 50, pseudopodia to 150/a. With the type. 



Genus M a s t i g a m ge b a Schulze. 

 Mastigamceba longifilum Stokes. 

 Length of body, 10-30, flagellum about 40//. 

 Stokes, Proc. Amer. Phil. Soc, xxiii., No.l24, 1886; Infus. 

 U.S., p.72, Pl.i., f.1-4. C^jSyn., M. reptans Stokes, New Frw. 

 Infus., I.e., 1890, p. 74, f.1-5. A minute, smooth form, generally 

 with relatively long flagellum, the body irregularly amceboid. 

 Botany; Lismore, Richmond R. 



Genus P e l o m y x a Greeff. 

 Pelomyxa echinulata Playf. 

 The entire body is clothed all over with short, slightly curved 

 spines. Syn., P. palustris v. echinulata Playf., Plankt. Syd. 

 Water Supply, p.548, P1.57, f.l6, 17. 



Length of body about 100, spines 8-20/x. 

 Pott's Hill, pond; Botanic Gardens, tank; Lismore, swamp. 

 Pelomyxa hirsuta, n.sp. 

 Ill',, Body densely clothed all 



,\< III//////'/' v^4i/ over with fine, bristle-like 



hairs. The hairs are blunt, 

 straight or very slightly 

 curved, a mere line in thick- 

 ness even under a high 

 magnification; nor could I, 

 even with a yV oil imm. 

 obj., detect any bacillar 

 structure. As in all forms 

 of Pelomyxa, the margin 

 showed a double line in 



Fig.l. — Pdomy.va hirsuta, n.sp.; ( x 500). 



