NEBELA LAGENIFOEMIS. 103 



Lacustre, I, 3 (1906), pp. 354, 355; MURRAY in Ann. 



Scott. Nat. Hist. 1907, p. 95. 

 Nebela ambiyua CASH in Tr. Manch. Micr. Soc. 1891 (1892), 



p. 50, t. ii, f. 17. 

 Nebela collar is vav. lageniformis (I. S. WEST in Jrn. Linn. 



Soc., Zool. XXVIII (1901), p. 321. 



Body of the test elliptic in broad view, compressed, 

 with a prominent tubular neck which is swollen mid- 

 way between its junction with the body and the oral 

 extremity ; the mouth convex or arcuate. In lateral 

 vieAV also elliptic, but one half narrower ; the neck 

 compressed, slightly convex on the lateral margins. 

 Structure of the test very similar to that of the allied 

 species, being of clear transparent substance and 

 covered with circular discs, which adhere at their 

 edges but do not overlap ; sometimes polygonal scales 

 form the surfacing, with a small proportion of longi- 

 tudinal rods or plates intermingled. Plasma and 

 pseudopodia not differing from those of other members 

 of the genus ; the nucleus normally situated, one or 

 more contractile vacuoles frequently visible. 



Dimensions: Length 120-125 /x ; breadth of body 

 65-70 p ; of mouth about 20 //.. 



In boggy ground., amongst Sphagnum, Dunham and 

 Knutsford, Cheshire ; more abundant in sub-alpine 

 districts in Wales and Scotland as at Capel Curig and 

 Llyn Idwal, in Carnarvonshire, and Towyn, Merioneth- 

 shire. Near Sutton Broad, Norfolk (E. Gurney). 

 Epping Forest, Essex (D. J. Scorn-field). Penvghent, 

 W. Yorks (G. S. West). Moel Siabod, N. Wales, at 

 2500 ft. (J. HopJcinson). Loch Ness, Scotland (D. J. 

 Scourfield). 



This species is very distinct; its neck, with the swollen 

 margins, sufficiently differentiating it from other Nebela?. 

 It occurs very frequently in Sphagnum from the Welsh 

 localities above named. But little variation can be 

 noted in size or structure. Leidy was of opinion that 

 this was an intermediate form connecting N. collaris 

 with X. larlata, but we have sought in vain for any 



