33 Mr. H. J. Carter on Freshwater Rhizopoda 



the Diatomacese) stands figured in different parts of my journal 

 since 1855^ as it is found in the island of Bombay, and now 

 copied into Plate II. fig. 15. Its diameter there does not ex- 

 ceed the -nrVrrth part of an inch, which is less than half the size 

 of the species found near Berlin by Claparede and Lachmann ; 

 but, like that, the test is hemispherical, open below, and the 

 nucleus and vesicula single; while, unlike it, the test of the 

 Bombay specimens is light- brown or fawn-coloured. Portions 

 of food were observed in it ; and I think the pseudopodia were 

 more pointed than those of Arcella vulgaris — thus more resem- 

 bling those of Amoeba. It was found abundantly in fresh water, 

 creeping over filaments of Spirogyra and Cladophora. I have 

 not yet met with it on the south coast of Devon. 



One of the figures in my journal is subspherical, apparently 

 in preparation for forming a new individual by duplicative divi- 

 sion, and thus represents the new half a little less in size, and 

 much lighter in colour, than the older one, — which not only 

 makes it resemble the Pyxidicula (c) figured by Ehrenberg under 

 a similar condition, but also the globular frustules of the chain- 

 like Diatomacese (e. g. Melosira) when, under division, their 

 hemispherical form is supplying the new half. I think, by and 

 by, much alliance will be found to exist between the Rhizopoda 

 and the Diatomacese. 



EUGLYPHA, Duj. 

 Euglypha compressa, n. sp. PI. I. fig. 13. 



Test ovate, compressed, convex, more or less expanded later- 

 ally, terminating in a sutural edge all round, except at the aper- 

 ture, which is 10-12-denticulated; composed of elongated hex- 

 agonal scales in juxtaposition, except at the aperture, where 

 their free ends are pointed; furnished with about twenty hairs or 

 spines irregularly scattered along a little more than the posterior 

 half of the sutural line. Animal occupying the whole of the 

 test, except towards the centre, where it is constricted, and thus 

 forms a line of demarcation between the anterior opake portion, 

 which contains the food, and the posterior or transparent one, 

 which contains the nucleus together with a great number of 

 colourless cells. The latter, globular in figure, with strongly de- 

 fined edge, appear to be the " granules.^' Vesicula in plurality, 

 situated opposite the constricted portion of the body. 



Hah. Heath-bog water. Progression erect, or with the aper- 

 ture downwards. Locomotion and capture of the food performed 

 by pseudopodia, which are straight, attenuated, ray-like, and of 

 variable length. 



Size, Length -rri^h, breadth -^ih, thickuess in the mid- 



