Identifier: foraminiferaintr00chap (find matches)
Title: The foraminifera: an introduction to the study of the protozoa
Year: 1902 (1900s)
Authors: Chapman, Frederick, 1864-1943
Subjects: Foraminifera
Publisher: London, New York (etc.) Longmans, Green and Co.
Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

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er of Textularia, but veryirregularly, the general plan being a moniliformseries of segments. Aperture usually crescent-shaped,sometimes gaping, but more often having a valvularflap, formed by a prolongation of the superior surfaceof the test, which nearly closes up the orifice, as inValviilina and certain of the Miliolince. Recent.(Plate 7, fig. K.) 144 THE FOEAMINIFERA EXPLANATION OF PLATE 7. Pig. A. Beophax difflugiformis, Brady, x 50. B. B. scorinurus, Montfort (after Brady), x 15. C. Haplophragmium Humboldti, Reuss (after Haiitken). x 18. D. H. nonioninoides, Reuss (after Chapman), x 30. E. Placopsilina cenomana, DOrbigny (after Brady), x 30.F,/. Crithionina mammilla, Goes, x 11. G. Verrucina rudis, Goes, x 7.H, h. Hajjlostiche Soldanii, Jones and Parker (after Brady), x 10.I. Lituola placenhila, Chapman, x 14. J. Bdelloidina aggregata, Carter (after M. Wrights drawmg). x 5.K. Haddo7iia torresiensis, Chapman, x 5.L, I. Polijiihragma cribrosuvi, Reuss (after Perner). x 8. PLATE 7.
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Family IV. LITUOLID.E. THE FAMILY LITUOLID^ 147 Genus Pohjpliragiiia, Eeuss. Test cylindrical, growing attached by the basalextremity; consisting of a line of very short cylin-drical segments placed one above the other. Interiorof the chambers labyrinthic; aperture terminal, cri-brate (sieve-like). Cretaceous. Example. — P. crihruHinii, Reuss (LicJienopora), Versteinerungen der bohm. Kreideformation, pt. ii.1846, pp. 60, 123, pi. xiv. fig. 10, pi. xxiv. figs. 3-5. The above species was found in the chalk forma-tion of Bohemia by Reuss, and later by Perner inthe Cenomanian of that country. The afiinities ofthe genus towards the semi-labyrinthic forms ofHcifJoplircujininm are seen in the internal structureof the segments as revealed by thin sections of thetest, as well as by the nature of the septal face, whichis cribrate, as in IIa))Joplira(j)niuiii irregidare. Thespecies is found adherent to shells and Gidcvris spines.Steinmann has referred this genus to the group ofthe pharetrone s

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