28 THE PALEONTOLOGY OF MINNESOTA. 



ITrochammina. 



Foraminifern. and Iladiolavia were secured from Illinois boulder clay. Much time 

 and labor were given to the examination of material that did not add to the interest 

 or value of our collection. 



Samples of inter-glacial peat, from Blue Earth county, Minnesota, were well 

 filled with more than 100 species of fresh water Diatomacete, but did not yield 

 Foraminifera, while the boulder clay both above and below the layer of peat 

 afforded good specimens of them. 



Of Foraminifera we have noted the following genera and number of species in the 

 material submitted to us for examination: Trochamnihui. 1 sp.; Textularia, 4 sp.; 

 Spiroplectit, 1 sp.; Oatidryitia, Isp.; V<ntci<ilin<i, 1 sp.; Buliniintt, "2 sp.; Pleurosto- 

 mellct, I sp.; Bolirimi, 1 sp.; Lagenn, 8 sp.; Polymorphinrt, 1 sp.; Nodomiriti, 1 sp.; 

 Uvigerina, 2 sp.; Globigtritw, 4 sp.; Orbulina, 1 sp.; Anoimilinn. 1 sp; PulrinuUnn, 

 2 sp.; Operculinu, 2 sp.; Nonionia, 1 sp. Total, 18 genera and 30 species, most of 

 which are figured, and the original descriptions are given as nearly as possible. 



Sub-KingdOm PROTOZOA. 

 Class RHIZOPODA. 



FORAMINIFERA. 



UTUOLIDJS. 



Sub-Family TROCHAMM1N-E. 



TROCHAMMINA, Parker and Jones. 



TROOHAMMINA INFLATA Montagu, sp. 



PLATE D, FIG. 81. 



Nautilus iiijltitii* MONTAGU, 1808. Test. Brit., Suppl., p. 8J, pi. xviii. UK. :i. 



Rtrfn/imi iii./fdfn WILLIAMSON, 1S,\S. K.v. For. (Jt. Mrit.. p. 50, pi. iv, ll^>. OH, W. 



Rotalinn (ZVocAuwniiim) in.ttula TAUKKK ;iiui JUNKS, 1859 .Ann. and Majt. Nat. Hist. sor. 3, vol. iv, 



p. 347, FlKuro. F. 



Trvchammina in./ltUa CAUIM:M 1:1;, lSt!2. Introil. Koram.. p. 141, pi. xi, tlR. 5. 



Tmchammina sqiuunata var. iujlntti PADKKK and .IONK-;. ISii.. IntiMil. Furain.. Aiipi-iulix, p. ;tl(). 

 TVochiinimiiin h(H,iI,i UKADY, 1865. Nat. Hist. Trail-*. Norllul. ami nurliain. vol. i, p. ;>,"> 

 IVocAamniiiKi inituttt(f) TATK ami HI.AKK. 157t?. Yorksliiro Lias. p. ;>^ pi. xvii. Hi;. IS. 

 TVorAammiiiK inflntti HIIADY 18S4. Report on Forani.. 11. M. S. ChalliM^vr, Xool., vol. ix, p. :t:iS. 



pi. xH, flg. 4. 



"Test free ; trochoid or convex, depressed, rotaliform : consisting ot about three 

 convolutions, the outermost of which is formed of five or six very venlrirose seg- 

 ments with deeply excavated septal lines. Inferior face soiucu liat concave, with 

 sunken umbilicus; peripheral margin lobulated. Aperture small, aivhod ; situate on 

 the inferior side of the final segment close to the previous convolution. -a little 

 within the periphery. Color pale brown, the small primary segments much darker 

 than the rest. Diameter 5 ' 5 inch (0.7 mm)." BRADY. lo<\ cit. 



Locality. North.-ast Minn.(! ) l. South Chieafro. 111. 



