BY G. I. playfAir. 659 



These are the only two nieniljers of tlie genus I have seen. 

 They are old finds, kn(j\vii to nie only as well-drawn figures, and 

 T have not been able to unearth even one specimen, from my pre- 

 serAed samples, for further information. Of the genus IJdeopera, 

 I have seen no form at all. 



Genus N e b e l a Leidy. 



Nebela MiLiTARis v. TUBULATA Brown. (PI. xxxix., f.3). 



Test lageniform, wdtli a very distinct neck having straight, 

 parallel sides, the least bit wider at the orifice, the margin of 

 which is thickened and strongly arched. Side-view as in the 

 type. Test composed of small, round plates. 



Length 60-64, breadth 26-30, orif. 9-1 4/x. 



Coogee (14); Botany (17). 



J. M. Brown, Frw. Rhiz. Eng Lake Distr., p.365, P1.50, f.9, 10. 



Cf. Penard, Faune Rhiz., p. 369, where he gives two distinct 

 forms for the type; from both of these, ours may be distinguished 

 by the parallel sides of the neck. In a specimen 64//. long, they 

 extend to 24/x from the centre of the orifice. 



Nebela caudata Leidy. (PI. xxxix., f.4). 



Length of body 76, breadth 58, orifice 21, tails 12/x lung. 



Botany (17). 



The shape of the test and the slight crenulation of the orifice 

 by a distinct series of marginal plates remind one very much of 

 X. deiitistonia. Walls* of the test composed of small, circular 

 plates. This species seems to be a great rarity. It is one of the 

 few recorded as absentees by Penard in his monumental w^ork, 

 Faune Rhizopodique du bassin du Leman, p. 57 2, f.5 (after Leidy). 

 Cash also, I.e., p. 125, f.99, could only reproduce Leidy's figures 

 An Australian example is shown in PL xxxix., f.4. 



Nebela dentistoma v. lageniformis, n.var. (PI. xxxix., f.5). 



Test broadly ovate as in the type, but drawn out and con- 

 stricted above the orifice into a short neck. Orifice minutely 

 crenulate by a regular series of marginal plates. Wall of the 

 test formed of minute, irregular, angular plates (diam. about 6/ji). 



Length 126, breadth 90, orif. 38/x. 



Auburn (149). 



