NKIJKI.A TUBULATA. 59 



NebeJa tubulata 



BROWN in Jrn. Linn. Soc., Zool. XXXII (1911), p. 79; in Scott. 



Natur. 1911, p. 229; op. cit. 1912. p. 122; op. cit. 1913, p. 186. 

 WAILES & PENARD in Proc. R. Irish Acad. XXXI, LXV (1911), pp. 9. 



18, 49-50, pi. v, f. 27. 

 WAILES in Scott. Natur. 1912, p. 61 ; in Jrn. Linn. Soc., Zool. XXXII 



(1912), pp. 125, 127, 140, 159 ; in Naturalist, 1913, p. 147. 



Test small, yellowish-brown in colour, flask-shaped, 

 compressed, composed of circular and oval plates ; test 

 in broad view oval, terminating in a long, slender, 

 usually parallel neck ; aperture elliptical, rounded in 

 broad .side view, notched in narrow view and bordered 

 by a thickened lip ; plasma clear, colourless, contain- 

 ing food -particles and occasionally green alga? cells ; 

 nucleus not large, containing several nucleoles ; pseudo- 

 podia not observed. 



Length 55-74 /x; breadth 28-48 /x; aperture 10-15 /A; 

 thickness about two-thirds the breadth ; length of 

 neck one-third to one-half the total length of test. 



Habitat. Sphagnum. 



ENGLAND. Cumberland, Westmorland, and Lanca- 

 shire (Brown] ; N. & W. Yorkshire ; Derbyshire 

 (Brown); Bedfordshire; Isle of Wight; Devonshire. 



WALKS. North Wales. 



SCOTLAND Dumfries ; The Outer Hebrides ; Perth- 

 shire ; St. Kilda and Wigtonshire (Brown). . 



IRELAND. Mayo and the Islands off Clew Bay ; 

 Inishbofin, Gralway; Kerry. 



The typical form of this species with the parallel 

 neck is easily recognized, but there is a distinct and 

 well-marked tendency for the neck to assume a toru- 

 lose form, in which case it has the appearance of a 

 small form of -V. lagenfformi*, although usually less in 

 size than var. minor of that species ; in Ireland and 

 the Seychelles both of these species occur in associa- 

 tion, but in New York State only N. tubulata was 

 found, and in several localities in South America only 

 N. lageniformis of normal size ; this was also the case 

 in Colorado, U.S.A., where the var. minor of that 

 species occurs, but ;V. tubulata has not been recorded. 



