IS 72.] JO^-ES A>"D TAIIKER — CUtTACKOUS I'OEAlIIXIFEnA, 105 



G. From the Greensand of Warminster. 



1. Planorbulma Ungeriana (i)'0.). 4. Pulvinulina caracolla (i?ce;/;.). 



2. ammonoides (Bss.). 5. Tinoporus concavus ? (Lamk.)*. 



3. (Trunc.) lobatula (JF. #«/.). 6. Patelliualentieularis(i'^e<??iC«i«cA). 



Of these there are also subvarieties corresponding more or less 

 closely not onlj' with those named by 11. d'Orbignyf, but also 'with 

 many of the numerous Eotaline varieties recorded by Prof. Reuss 

 and others from the Chalk of Europe. This Tsill appear more 

 distinctly in the promised Monograph on the British Cretaceous 

 Foraminifera by ourselves and Mr. H. B. Brady. Thus, altliough 

 wonderfully constant in chief characters, the little PJcmorbulina 

 ammonoides is linked by slightly divergent subvarieties with PI. (Pla~ 

 nulhia) ariminensis on the one hand, and with PI. Ungeriana on the 

 other ; and the latter is but a feeble form of PI. Ilaidivgerii, and so ■ 

 on. So also the small forms of Planorhidina figured by D'Orbigny 

 from the Chalk of Fraucc maj^ be said to radiate from PI. ammonoi- 

 des with gentle modifications. 



§ V. — Among Dr. Ehkekbekg's figures of Foraminifera from (1) 

 the Chalk of Mden, Denmark (' Mikrogeol.' pi. 14), Ave find : — 



1. Planorbulina ammonoides (7?S5.). 4. Pulvinulina elegans ? (-D'O.). 



2. globulosa {Ehr.). .5. • Orbignyi ? (Bmn.). 



3. (Planulina) ariminensis (-Z)'0,). G. spatiosa (i'/jr.). 



(2.) From the Chalk of lliigen, in the Baltic, Ehrenberg figures 

 (•- Mikrogeol.' pi. 15):— 



1. Plcnorbulina Haidingerii (i)"0.). 4. Pulvimdina Micheliniana (J9'0.). 



2. ammonoides {Ess.). 6. squama (Ehr.), 



3. globulosa (Ehr.). 



(3.) From the Eussian Chalk of Volsk ('Mikrogeol.' pi. 16) :— 



1. Planorbulina Haidingerii (Zi' (9.). 3. Pulvinulina caracolla (2?ff»i.). 



2. — - — (Planulina) ariminensis {!)' 0.). 



(4.) From the North- American Chalk of Missouri (' Mikrogeol.' 

 pi. 17, i.) :- 

 1. Pulvinulina caracolla {limn.). 



(5.) From that of Mississippi (' Mikrogeol.' pi. 17, ii.) : — 



1. Planorbulina ammonoides (7?.s.s.). 2. Planorbulina (Planul.) ariminensis 



{D'O.). 



In these determinations from Ehrenberg's plates we cannot aim at 

 ■ catching the siibvarietal minutise very clearly ; for the figures are 



* This species and its var. globidaris (Phil.) of the Chalk-marl and Chalk are 

 usually termed OrbitoUncE ; but they belong to the Eotaline genus Tinoporus 

 (see Carpenter's ' Introd. Foram.' pp. 223 &c.). The very similar specimens, 

 however, from the Greensand of Haldon and Milberdown, Devonshire, and some 

 of those from Warminster, are PafelliiKB, also of the Eotalin.e family. 



t Prof. Morris's ' Catalogue of British Fossils,' 2nd edit. 1854, 



