368 W, ARCHER. 



in a radial direction as regards the inner body, and 

 through which he supposes the pseudopodia^ which seem 

 very hue and delicate, to project, if the dotted appearance 

 presented by the plates be really due to the presence of 

 actual foramina, probably this should remain geiierically dis- 

 distinct from the foregoing. They may possibly not be per- 

 forate, but merely indications of differences of density in 

 the plates, and the pseudopodia pass between, not through 

 them ; at least the supposed foramina are greatly more 

 numerous than the pseudopodia. But they certainly have 

 the aspect of perforations. In any case the form of the plates 

 is very distinct from those of Hertwig and Lesser's species. 

 There is, no doubt, strong enough resemblance to justify the 

 idea that this and the foregoing are congeneric ; and in case of 

 such view being adopted the name Pinaciophora has the 

 precedence, as Greeff would appear to have already briefly 

 described his form in 1871,^ considerably prior to the publi- 

 cation of Hertwig and Lesser's memoir. 



The plates, like those of Hertwig and Lesser's marine form, 

 are not firmly connected together, although when in sitiiSLve in 

 contact and overlapped, but they can readily be separated and 

 isolated by pressure. Immediately below the hollow-globular 

 skeleton formed by them, the author describes " a narrow 

 clear sarcode-layer surrounding the reddish-brown coloured 

 body-mass. Ecto- and endosarc are not sharply distinguish- 

 able. In the middle there lies a comparatively large hyaline 

 capsule-like spherical body, which again contains a second 

 likewise globular and centrally posed structure, enclosing 

 finely granular contents." The latter is doubtless the 

 nucleus, with nucleolus. 



Raphidiophrys, Archer.^ 



In this genus, as in the preceding, Hertwig and Lesser 

 are equally disinclined to admit that the rhizopod possesses 

 external to the central body-mass any special sarcodic 

 stratum. They call this region here, as in Heterophrys, 

 simply " skeleton." Without doubt we have here to do 

 with a true (chalarothoracous) " skeleton," and this consists 

 of elongate, nearly straight, or gently curved and acutely 

 pointed, or (in the author's new species, R. elegans) con- 

 siderably curved and somewhat bluntly pointed spicules, 

 but to me such " skeleton " parts seem to be immersed in an 

 outer mobile matrix of some kind. That, to a great extent, 



' " Sitzungsberichte der Gesellschaft zur Beforderung der gesaramten 

 Naturwisseiischaften zu Marburg," June, 1871. 



' ' Quart. Journ. Microsc. Sci.,' n. s., vol. ix, p. 255. 



