NBBELA BARBATA. 113 



9. Nebela barbata Leidy. 

 (Plate XXVII, figs. 5 and 6 ; and fig. 95 in text.) 



Difflugia (Nehela) harbata Leidy in Pr. Acad. Philad. 1874, 

 p. 157. 



Nebela barbata Leidy in Pr. Acad. Philad. 1876, p. 119, 

 f . 18 ; op. cit. 1879, p. 162 ; and Preshw. Rhiz. N. Amer. 

 (1879), p. 159; t. xxiv, ff. 14-17; Hitchcock Synops. 

 Freshw. Rhiz. (1881), p. 23; Schewiakoff in Mem. 

 Acad. St. Petersb. (7) XLI (1893), 8, p. 98; Scourfield 

 in Pr. Zool. Soc. 1897, p. 787 ; Eyfeeth Naturgesch. 

 mikr. Siisswass. ed. 3 (1900), p. 265; Levandbb in Acta 

 Soc. Fauna Penn. XX (1901), 8, p. 11; G. S. West in 

 Journ. Linn. Soc, Zool. XXVIII (1901), p. 323. 



fJc^'yifi^ 





1 "-> -:'^~ 

 1 -xi" ^- 



Fia. 93. — Nebela barhata. Llyn Llydaw, Snowdon. From a drawing 

 by G-. S. West (reduced), x 325. 



Test in broad view flask-shaped, witli an ovoid body 

 and cylindroid neck, the latter about equal in length 

 to the body; the mouth, in broad view, sHghtly ex- 

 panded and convex. In narrow lateral view com- 

 pressed; the sides tapering gracefully into the neck, 

 which is narrow and terminated by the notched mouth. 

 The whole structure gracefully proportioned and trans- 

 lucent, with a surfacing of comparatively large circular 

 discs, — their outlines sometimes hardly perceptible — 

 accompanied, according to. Leidy (who named the 



VOL. 11. 8 



