BIOMYXA VAKAXS. 89 



Proc. Linn. Soc. X. S. Wales, (2) I (1886), p. 504; 

 ROLLESTON Forms Aiiim. Life, eel. 2 (1888), p. 920 ; 

 AI.KBIIS in Abh. K. Akacl. Wiss. Berlin, 1888 (1889), 2, 

 p. 23, tt. iv-v, ft'. 46-51 ; CASH in Trans. Manch. Micr. 

 Soc. 1891 (1892), p. 55, t. ii, f. 12; PENARD Faune Rhiz. 

 Leman (1902), p. 548, if. ; RHUMBLER in Arch, f. Protis- 

 ten-Kunde, III (1903), p. 187, f. 2. 



Body when contracted roundish or roughly ovoid ; 

 at other times mobile, throwing out branching and 

 inosculating pseudopodia which form ultimately an 

 intricate net-work, " often," to quote Leidy's descrip- 

 tion, " expanding into perforated patches." Pro- 

 toplasmic substance pale, finely granular, rarely 

 containing chlorophyllous matter ; but numerous minute 

 vesicles and oil-like molecules are usually present, the 

 former occurring near the margin of the body and 

 along the pseudopodal extensions. The nuclear struc- 

 ture is undetermined. A circulation of minute granules 

 is perceptible along the filamentous pseudopodia. 



Diinvnxions extremely variable. 



In swampy ground, amongst Sphagnum; also in 

 tufts of moss on moist rocks. Dunham, Cheshire ; 

 Isle of Man. 



The pale colourless protoplasm and its finely and 

 uniformly granular structure are distinctive of this 

 organism, separating it at once from Leptophrys 

 H. and L., of which no British examples, so far as we 

 know, have been found. The Isle of Man examples of 

 Itianit/.i-ci, which occurred in tufts of Barbuhi growing 

 on rocks near the coast, at Per wick Bay, agreed most 

 closely with Leidy's description and figures. A study 

 of Leidy's figures on Plates xlvii and xlviii of ' Fresh w. 

 Ehiz. N. Amer.,' leads to a suspicion that he may have 

 included Oymnophrys with this genus. 



Genus 9. PENARDIA Cash, 1904. 



Peuardia CASH in Journ. Linn, Soc., Zool. XXIX (1904), 

 p. 223. 



