358 W. AliCHER. 



GreefF to describe the outer border as " eingebuehtet." At 

 the time I described this form 1 hardly thought it was essen- 

 tial to distinguish it generically from that with the fim- 

 briated border, but possibly it Avould be as well that they 

 should stand asunder in a generic point of view, yet side by 

 side. If so, Greeffs generic name is very appropriate ; but 

 should the species not stand, according to the understood laws 

 of nomenclature, as Spharastrum Fockii (Archer), Greeff? 

 My impression at the time and still is that it is highly probable 

 that this Rhizopod may be one and the same with that 

 figured but not named or described by Dr. Focke,i and. re- 

 ferred to by him in his paper as " No. 1," and hence I called 

 it after the name of that observer. 



I have found this form in an encysted state, the inner body- 

 mass becoming covered by a thickened wall, the outer region 

 excluded therefrom, and the latter now looking like a 

 delicate, much contorted and crumpled hyaline membrane, 

 and destitute of granules ; but this appearance is seemingly 

 due to the manifold peculiar lines, already alluded to, which 

 permeate it, and which are so difficult to be properly under- 

 stood or interpreted. For a good representation of the 

 appearance of this cast-off outer envelope see Greeff's figures 

 in ' Schultze's Archiv,' Bd. xi, t. ii, ff. 25, 26. 



Chondropus viridis, Greeff.^ (PI. XXII, fig. 20.) 



• Whether the very distinct-looking form named as above 

 by GreefF should really fall in here, or along with the truly 

 naked Heliozoan forms is not as yet clear. It is undeter- 

 mined, 1 think, whether the marginal region shown in his 

 figure (PI. xxii, fig. 20) as of a yellow colour may represent 

 an outer envelope comparable to the colourless and hyaline 

 one of Astrodisculus, or the granular one of Heterophrys, or 

 whether the whole basic substance of the body may have this 

 tint. 



The author himself only shortly describes it as *' possessing 

 a globular body filled with green, solid capsules, which upon 

 compression under a high amplification presents an irregular 

 considerably-fissured surface. Between the green capsules, 

 mostly, as it appears, at the outer region of the body, there 

 lie minute, sharply contoured, bacillar bodies (' Stabchen '), 

 and other more or less irregular particles, of likewise sharp 

 contour. The sarcode surrounding these structures has a 



' Siebold aud Kolliker's 'Zeitschrift fiir wiss. Zool.,' Bd. xviii, lleft 3, 

 1868. 



- Greeff, "Ueber Radiolarien und Radiolarienartinje Rliizopodcn dcs 

 Siissea Wassers," in 'Schultze's Archiv,' Bd. xi, p. 27, t. ii, f. 18. 



