Ill 



therein more or less numerous cell-like structures, and giving 

 forth slender marginal pseudopodia. 



The generic type souojht to be established here would be 

 unnecessary if the two forms it is destined to contain pos- 

 sessed " central capsules," for in that case they would 

 seemingly fitly enough fall under the genus Thallasolampe 

 (Haeckel), which is destitute of " skeleton/' admitting, 

 indeed, that the contained cells might be assumed as homo- 

 logous with the " yellow cells" of that genus. But, as 

 before alluded to, the absence of the " central capsule" 

 would altogether exclude our forms from the true " Radio- 

 laria." There appears a certain resemblance to Strethill 

 Wright's genvis Bodcria^ [B. Turneri, Strethill Wright), and 

 this suj)position favoured rather by his figure than by his 

 description. That form is described as consisting of " a 

 simple mass of brown or orange sarcode, enclosed in a very 

 delicate and colourless membranous envelope, from openings 

 in which protrude long pseudopodial branches, generally 

 three or four in number, but sometimes more numerous, 

 especially in larger sjjecimens." It is, I think, quite certain 

 that in my forms there is no " membranous envelope" 

 (however delicate), though, indeed, this character is not 

 seemingly expressed in his figures, whilst his fig. 2 is sup- 

 posed to show two examples "conjugated," and this indeed not 

 prevented by the assumed outer " membrane." Further, 

 the rounded bodies, superficially bearing some resemblance to 

 those of my forms, are represented as " nuclei," or rather 

 " ova," not as themselves nucleus-containing, outwardly 

 bounded homologues (.'') of " yellow cells." Judging from 

 Strethill Wright's description, it is, I think, only possible, 

 but not very probable, that either of my forms can be con- 

 generic with his. Perhaj^s, should these lines ever meet his 

 eye, he may, however, be able to throw a further light on the 

 question. 



If, as is probable, such truly cellular structures as those cha- 

 racteristic, for instance, of Cystophrys Haeckeliana, are to be 

 considered as the representatives of the " yellow cells" of the 

 typical " Hadiolaria," then I think that Wallich's view that 

 the homologiies of those structures pervade all the Rhizo^ioda 

 cannot be maintained. "^ I am unable to folloAV him in re- 

 cognising the representatives of " yellow cells'^ in freshwater 

 rhizopoda in general, for the granular and quasi-cellular 



1 "Observations on British Zoophytes and Protozoa," by T. Strethill 

 Wriglit, M.D., in 'Journal of Anatomy and Physiology,' vol. i, page 335, 



J)l. XV. 



^ Loc. cit., p. 70. 



