BIOMYXA VAGANS. 89 
Proc. Linn. Soc. N. 8. Wales, (2) I (1886), p. 5U4; 
Rouiesron Forms Anim. Life, ed. 2 (1888), p. 920; 
Mesrus in Abh. K. Akad. Wiss. Berlin, 1888 (1889), 2, 
p. 23, tt. iv-v, ff. 46-51; Cas in Trans, Manch. Mier. 
Soc. 1891 (1892), p-. 99, t. ui, f. 12; Penarp Faune Rhiz. 
Léman (1902), p. 548, ff.; Ruvmsizr 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-hke 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. 
Dimensions 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 Leptophirys 
H. and L., of which no British examples, so far as we 
know, have been found. The Isle of Man examples of 
Biomyxa, which occurred in tufts of Barbula growing 
on rocks near the coast, at Perwick Bay, agreed most 
closely with Leidy’s description and figures. A study 
of Leidy’s figures on Plates xlvii and xlvin of ‘ Freshw. 
Rhiz. N. Amer.,’ leads to a suspicion that he may have 
included Gymnophrys with this genus. 
Genus 9. PENARDIA Cash, 1904. 
Penardia Casn in Journ. Linn. Soe., Zool. XXTX (1904), 
p. 223. 
