The microscope and its revelations . the instrumenta-lity of the sto-lons of sarcodewhich occupythese canals, andwhose remainsmay often be distinctly traced in the dried shell.* Nowthis, the highest type of Eoraminiferous structure, is notonly presented by such spiral forms as Nummulite, but isfound also in a genus that is conformable, in its concentricplan of growth, to Orbitolite. Hence it is obvious that noarrangement founded, as is that of M. DOrbigny, upon acharacter of such secondary importance as the diicction ofgemmation, is likely to be in accordance with physiologicalfeatures which a
The microscope and its revelations . the instrumenta-lity of the sto-lons of sarcodewhich occupythese canals, andwhose remainsmay often be distinctly traced in the dried shell.* Nowthis, the highest type of Eoraminiferous structure, is notonly presented by such spiral forms as Nummulite, but isfound also in a genus that is conformable, in its concentricplan of growth, to Orbitolite. Hence it is obvious that noarrangement founded, as is that of M. DOrbigny, upon acharacter of such secondary importance as the diicction ofgemmation, is likely to be in accordance with physiologicalfeatures which a perfect knowledge of the animal might be * The Author has been enabled to make-out this curious point completely,in the Calcarina, a little body resembling a spur-rowel. For he has ob-tained ample evidence that the spire with its segments, andthe interstitial skeleton extending itself into radiating spmes, may grow quiteindependently of one another. The proof will be submitted in future Memoirsto the Royal Section of Faujasina near its base and parallel toit:—showing, a a, the radiating intersepfal canals;J, their internal bifurcations; e, a transverse branch;d, tubular wall of the chambers. COLLECTIOX A2sD SELECTION OF EOEA^EIXIEERA. 517 expected to afFord; and as these can be partly judged-of from thestructure of the shell, it seems obvious that tMs ought to bemade the first consideration. To carry-out a classification onsuch a basis, however, will involve a large amount of patientinvestigation.* 292. Many of the Foraminifera attach themselves in theliving state to Sea-weeds, Zoophytes, &c.; and they should,therefore, be carefuLLy looked-for on such bodies, especiallywhen it is desii-ed to observe their internal organisation andtheir habits of life. They are often to be collected in muchlarger numbers, however, from the sand or mud dredged-upfrom the sea-bottom, or even from that taken from betweenthe tide-marks. In a paper containing some valuab
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