138 MR. G. H. WAILES ON FRESHWATER RHIZOPODA 



The test is composed of plates of various shapes and sizes ; sometimes they 

 are large, circular and imbricated, or they may be small and separated from 

 each other. Some were found with tests largely composed of the scales of 

 Euglyplia cremdata var. minor, which were quite perfect and easily recog- 

 nisable, as they differ slightly in shape from the scales of E. cremdata, a 

 species not recorded from Good Ground {vide PL 12. fig. 38). 



Nebela GRACILIS, Penard (37, 1910). 

 N. coUaris pars, Leidy, pi. 23. figs. 4-6 (30). 

 N.galeata pars, Penard, p. 351, figs. 4, 5 (36). 



Described only recently by Penard, this species is not uncommon at Lake- 

 hurst and Good Ground. Leidy represents it very faithfully in figs. 4 and 5 

 (leno-th 110 /Lt), but in the end view fig. 6 the sides appear to have been crushed, 

 usually they are flattened but not concave. At Lakehurst it is found in a 

 very handsome form up to 130 fju in length ; at Good Ground it is of normal 

 size, 97-110 /z in length. 



Dimensions. Length 97-130 /x; bi-eadth 42-65 /i ; aperture 14-23 /jl ; 

 thickness 25-40 //-. 



Habitat. Submerged sphagnum. 



Distribution. Absecom (Leidy) and Lakehurst, N.J. ; Pcnney's Pond, 

 Good Ground, L.I. ; Switzerland (Penard). 



N. GRISEOLA, Penard (39). 



Clare Island Survey, figs. 2o a-ff (45). 



This species, recently described by Penard from Australia and from 

 L'eland, is found at Lakehurst in association with the two other species of 

 JSfehela possessing beaded apertures^ N. tenella, Pen., and A", cratera, sp. nov.; 

 usually larger than the former, at Lakehurst they are of nearly equal size, 

 but can be distinguished from one another by the greater compression of the' 

 test of N. tenella. 



Length 80-85 yu, ; breadth 53-60 /x : a[)erture 16-1 8 /it in diameter ; thick- 

 ness 43-50 //,. 



Distribution. Lakehurst, N.J. ; Australia (39) : Ireland (45). 



N. LONGiCOLLis, Penard (34). 



This species is distinguished from A", americana by the slight compression 

 of the test and the elongated neck. It is much smaller than N. tubulosa 

 and of slighter proportions. 



Length 133-140 jx ; breadth 45-52 yu. ; aperture 20 /x ; thickness 40-48 jju. 



Distribution. Colorado (35); New Jersey; Switzerland (36); Australi;i, 

 New Zealand (39) . 



At Lakehurst it is rare; it has a resemblance to jV. harhata. Leidy, but is 

 glabrous, more robust, and has a shorter neck. 



