114 BRITISH FUESHWATEE RHIZOPODA. 



species from American examples) witli an arrangement 

 of short, delicate, hair-like spicules. The latter, how- 

 ever, are rarely observed in British examples. 



Dimensions: Length 80-1 60 /a ; breadth 40-60 /a. 



In Sphagnum from Cader Idris, Towyn, Tan-y- 

 Bwlch, and near Criccieth. Also reported by Gr. S. 

 West from Llyn Llydaw, Snowdon, with spicules 

 which measured about 15 ^ in length (fig. 95). Moel 

 Siabod and above Dolgam, Capel Curig, ]S^ "Wales (./. 

 Hopldnson). Loch Ness, Scotland (./. Murray). 



It ought not to be possible to confound this species, 

 as is sometimes done, with N. lageniformis. It is much 

 more delicate, and has a longer neck in proportion to 

 the size of the body ; the neck, moreover, is of uniform 

 width, the sides being as nearly as possible parallel, 

 whilst in narrow lateral view the mouth is prominently 

 notched. Living examples seem to be rarely met with. 



10. Nebela galeata Penard. 

 (Plate XXVII, figs. 7-9.) 



Nebela collaris Leidy (pars) Freshw. Rhiz. N". Amer. (1879), 

 p. 14.5, t. xxiii, ff. 2-7. 



'Nebela collaris var. genuina Taeanek in Abli. bohm. Ges. 

 Wiss. (6) XI (1882), 8, p. 32, t. i, ff. 1, 2. 



Nebela galeata Penaed in Mem. Soc. Geneve, XXXI (1890), 

 2, p. 161, t. vi, ff. 78-84 ; and Faune Rhiz. Leman (1902), 

 p. 360, ff. 1-6 (p. 361) ; AvERiNTZEY (pars) in Trudui 

 S.-Peterb. Obshcb. XXXVI (1906), 2, p. 243; Schou- 

 TEDEN (pars) in Ann. Biol. Lacustre, I, 3 (1906), p. 355. 



A much finer species than either N. inarginata or 

 N. americana ; the test elongated, with an arched 

 crown in face view, the margin on either side descend- 

 ing without curvature to the corners of the mouth ; 

 the margin thickened all round. In narrow lateral 

 view the thickened edge of nearly uniform width from 

 the crown (where it forms a distinct protuberance) 

 downwards, in this respect presenting a contrast to 

 the knife-like edge in N. carinata or N. marginaia ; 



