IXFCSORIA. 



INFUSORIA. 



1. Artiiuryclu, <narM. 3. CUrfnorfucw radial, u. 

 4. TrUtrmltmm fmrut. t. GtUlantllt nlrata. 



And far companion the following outline* of mixed marine and 

 fraab-water species common in the Polienchiefer of Bilin and the 

 P*U md KMselguhr of Franienbad, Egra, San Flora, &c. 





. C a illutla dattuu. . 



a, XMrab nrMu. J. KmrilUri, rulfarit. 

 /* tmfUflm. 10. Ou* n lo4una rlyprat*,. 



Theft are tertiary forma, and below in a specimen of a group 

 r'iTd to the reesot gentu A'anMidivm. and frequent in the flint 

 ooduUs which occur in chalk. 



"f* * "T*" rf //* from the Kieselguhr of Frantenbad :- 

 wr(ntartiflX -V. ITiWo, AT. fulra, ff. KMU, Oompho- 

 i (froth-wa 



-. , . , . 



paiWm, (7. ctera/wi (froth-water specie* now 



, . - 



"^.Wite,* "*"*' (DOW 

 Brw in UM OarUad water). OaMmtU 



_If'.' li . J ' '"/* fa h * I'^ 



near 







( f) 



of Frantenbad: 



AM. 



of Mauritius- - 

 Ita ( f ), A', gibba, A", bifront 



In the Bergmehl of Santa Fiora -.Synedra capitals (plentiful) ; with, 

 this are S. ulna (living both in fresh-water and the sea), A'oru-u/a t'n- 

 tr./Ko/u, A'. capilala, \.riridit, A'. yi'tia (fresh-water species) ; AT. riridula, 

 (living in the Baltic), iVnofta yranWa/a, A'atncWa /oHu (extinct). 

 C'OCCOMU undulata (marine), (rompAotwnm paradojcum, Q. claralvtn, 

 O. acuminalum (living near Berlin), Cocnntma cymliifurme (fresh- 



iter), Qaillondla ilafica, Spicula of S/ujnyiir, or Sponytlla. 



In the Polienchiefer of Bilin : Podatphenia nana (plentiful). 

 Oaillonella dittant, A'un'cu^a traljirum, BaciUaria itdyarii ? (probably 

 all marine !) 



In the Leaf Tripoli -.GaiUonella dutant (plentiful), Podotpkati* 



ma, BaciUaria vulgarit ? (probably marine.) 



At Bann, in the county of Down, Captain Portlock found under 

 Peat Xaricultc, Bacillaruc, Eunotitr, with fragments of AchnantJict 

 and Conferva;. (' Microscopical Journal,' 1841.) At Gainsborough Mr. 

 Binney found under Peat abundance of GaiUonella. At Bridlington. 

 in white and brown Marls, Eunotia terra (f), BaciUaria rulyaru, 

 .\aricula iiuryualu, A', viridit, N. phtenicenitro*, Cocconema laiiceolata, 

 CampiloditcHt tonala, to. 



The North American localities have yielded to Bailey and Ehrenbcrg 

 a large catalogue of Diatomaceous Inftuoria. EhreubiTg enumerates 



Amphiphora one species. 

 Cocconrma. two species. 

 Eunotia seven species. 

 PrayiUaria ^three species. 

 Oomphonema four species. 

 Jfimantidium one species. 

 A'orfcWa eighteen species. 

 Xtaurotira two species. 

 TaMlaria three species. 



With these are three forms of Spongoid Spicula and two species of 

 Thy'.acium. 



These are mostly derived from beds lying under Peat 

 The Richmond earth (of miocene date) yields 



CoKineditctu radiatut and other 



species (fig. 8) . . . . I Mr. Quekett has found several of 



Aclinocycltu tcnariut and others these recent in the North Sea. 



(fig. 2) > Mr. Lee has discovered Cotcino- 



Ifavicvla, several species . ditci and Dictyodue in the liar- 



CaMondlce .... iiacle and Scallop. 

 Dictyocha fibula (ftg. 1) 



In the chalky marls of Oran, S cily, Greece, Ac., occur many living 

 forms, as 



Actinocylut ten species. 

 Amphilrtra two species. 

 Biddulpkia one species. 

 Cocconema one species. 

 Catcinoditcvt seven species. 

 Didyocha four species. 

 unotia two species. 

 GaiUoneUa one species. 

 (frammatophora four species. 

 Jlaliomma one species. 

 A'un'cuia six species. 

 Striatdlaone species. 

 Smedra one species. 

 TeueUa catena one species. 

 Triceraiium one species. 



In the white chalk and flint of Europe, and also living 



Frayillaria rhabdotoma. Gravesend. 

 P. tlrioiala. Oravesend. 

 GaiUonella awichateea. Rugen. 

 Ptridinium pyrophorum. Oravesend. 

 Xantliidiumfurcatum. Oraveaend. 

 X himUum. Oravesend. 



Dr. Mantell has been unable to discover Fragillaria in the chalk of 

 Oraveaend, but Xanthulia occur in the chalk of Dover. ( Ann. Nat. 

 Hist,' Aug., 11*45.) (railloneUa aurichalcea has been regarded as an 

 OfdUaloria ; and it appears doubtful whether the so called Xanlliidia. 

 of the flints and chalk are really to be referred to that fresh-water 

 genus. 



From the preceding notices we may gather as general facts the 

 occurrence of the remains of siliceous /n/moria in the following 

 stratifications : 



f Recent Fluviatile and other sediments. 



Lncustrine deposits of the Klk period. 

 Csinoroic period J Depots of the ' Lehm ' period. 



Miocene Tertinries. 

 I Eocene Tertiaries. 



Mesozoic period 



J Chalk deposits. 

 I Oolitic deposits. 



The relative abundance of the Infusoria in these several deposits is 

 inversely as their antiquity ; they are rare in the oolitic and cretaceous 



