98 BRITISH TRESHWATER RHIZOPODA. 



driven to the conclusion that they were parasitic. It 

 is difficult to see how the eggs could have found their 

 way through the narrow orifice of the test if they were 

 "laid" hj the parent rotifer in any external position. 



Under the name of Difflagla bijies, Carter (' Ann. & 

 Mag. Nat. Hist.,' Ser. 4, Vol. V) described a,.rhizopod 

 which, from the figures given, appears to be a mal- 

 formed example of Nehela collaris. If the test were 

 perfect it would not be distinguishable from that 

 species, but the crown, instead of forming a regular 

 arch, is bulged in at the apex, producing a deep 

 concavity, the cusps of which (as the test lies on its 

 broad side) are convergent. 



[As, however, it is possible that this may be a good 

 species. Carter's description and three of his figures 

 are here reproduced, his dimensions in fractions of an 

 inch being converted into micromillimetres, and a small 

 figure showing the circular scales slightly overlapping 

 each other being omitted. 



? Nebela bipes (Carter) Murray. 

 (Figs. 87-89.) 



Difflugia bipes Caetee in Ann. Nat. Hist. (4) V (1870), p. 



'623, t. V, ff. 6-9 ; BuTSCHLi in Bronn's Thier-Eeichs, I, 1 



(1880), t. iii, f. 10. 

 Nebela hipes Mueeay in Pr. R. Soc. Bdinb. XXV, 8 (1905), 



p, 609. 



Test oblong, somewhat compressed, expanded pos- 

 teriorly, narrowed anteriorly ; lateral view lageniform, 

 with the body somewhat inflated ; posterior extremity 

 obtuse, convex, accompanied on each side by a cruri- 

 form conical extension of the test ; anterior extremity 

 narrow, terminating in a contracted oral orifice 

 bordered by pointed scales, which, in a circular form, 

 slightly overlapping each other, cover the whole of the 

 test in great uniformity. 



Animal composed of colourless granular sarcode, 



