AMONG SIMPLK SAKCODE OBQANISMS. 



295 



zone is composed of a soft hyaline substance, and, according to 

 Greeff, is bounded externally by a very delicate siliceous capsule, 

 perforated by minute openings, througb which the pseudopodia 

 are emitted, and through which Grreef believes he has seen nu- 

 tritive corpuscles pass. The existence of a perforated siliceous 

 capsule, however, has not been accepted by other observers ; and 

 Hertwig and Lesser think it probable that all the species referred 

 by Grreeff to his genus Astrodisculus would with more justice go 

 into G-reeff's genus Hyalolampe, identical with the Fompholyjco- 

 phrys of Archer. 



Fig. 14. 



Hi/cdolampe fenestrata — the protoplasm body, with its nearly central nucleus, 

 surrounded by its siliceous test, between whose component spherules the pseu- 

 dopodia are emitted. (After Greeff.) 



Greeff describes*, under the name oi Hyalolampe fenestrata (fig. 

 14), a most interesting and characteristic form, in which the sarcode 

 body is surrounded by a very elegant siliceous shell, which has 

 the appearance of being formed of little glass spheres laid one on 

 the other. He believes the shell to be perforated for the emission 

 of the pseudopodia. 



Nearly simultaneously with Greeff, but claiming the priority 

 by some days, Archer had described, under the name of PompJlo- 

 lyxophrys punicea, the same rhizopod, which he found not unfre- 

 quently in moor-pools in various parts of Ireland. It has been 

 more recently examined by Hertwig and Lesserf, who have supple- 

 mented and corrected the descriptions given by Greeff and Archer. 



* Loc. ei(. t Loo. cit. 



25* 



