the Nomenclature of the Foraminifera. 267 



PI. VI. Lower Silurian green sand of Petersburg. Fig. i. a 

 (p. 173), Textilaria glohulosa'} J in a piece of brownish siliceo- 

 calcareous green sandrock (treated with acid), from under 

 the Orthoceratite Limestone, Narwa, and fig. 5, Outtidina^ 

 are both small TextilaricB. Fig. c, Rotalia^ from the same ; 

 a Rotaline or Endothyran form. Fig. ii. (p. 174), a thin slice 

 of the same rock (green), showing minute shaped bodies ; 

 19, Solenolithis simjjlex] 20, Dermatolithis subtilis', 21, D. 

 granulatus : said to be brownish calcareous and microscopic, 

 belonging to the structure of Obolus, and abundantly scattered 

 throughout the green sandstone of Narwa. 



PI. VII. Yellow, red, and brown sand casts of the yellowish 

 Chalk of Alabama, equivalent to that of the Mississippi. 

 Figs. 1, 2 (p. 175), Textilaria americana. Fig. 3, T. striata. 

 Figs. 4, 5, Guttulina turrita a, /3, are Verneuilina pygmcea. Fig. 

 6, Spiroplecta americana'? Fig. 7, Textilaria americana'? 

 Fig. 8, T. eury conns ?, is T. agglutinans. Fig. 9, T. glohidosa ? 

 Fig. 10 (p. 176), Dimo7'phina (Text.?) saxipara, is Text, glo- 

 hidosa. Fig. 11, Phanerostomum hispididum^ and fig. 12^ Ph.?j 

 are Glohigerina cretacea. Fig. 13, Rotalial^ is a young lim- 

 bate Planorhidina. Fig. 14, Phanerostomum senarium ?, fig. 

 15, Ph. poridosum?^ and figs. 16, 17, Ph. dilatatum^ are Glo- 

 higerina cretacea. Figs. 11 & 12 have more chambers than 

 figs. \4r-n^ but belong to the same species. 



Foraminifera from the Chalk j Alabama. 



1. Textilaria agglutinans, D'' Orb. 



2. globulosa, Ehr. 



3. striata, Ehr. 



4. americana, Ehr. 



5. Spiroplecta americana (?), Ehr. 



6. Verneuilina pygmaja (Egger). 



7. Globigerina cretacea, i)'()rZ). 



8. Planorbulina, young. 



§ 14. " On organic siliceous sand, and Herr Ignatz BeisseVs 

 observations on such beds near Aix-la-Chapelle^'' (Monatsber. 

 1858, pp. 118-128). See also 'Literary Gazette,' 1857, 

 p. 1220, for a notice of Herr Beissel's researches on the Glau- 

 coniferous sand-grains of Aix-la-Chapelle. 



§ 15. I. "On the progress of hnoioledge of important micro- 

 scopic organic forms in the loivest Silurian clay-beds near St. 

 Petersburg'' (Monatsber, 1858, pp. 295-311). See also ' Neues 

 Jahrb. fiir Min.' &c., 1858, 5. Heft ; Murchison's ' Siluria/ 



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