84 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



GENERIC TABLE OF MEMBRANIPORAE. 



Section I. No ovicell. 



Ci-nera repivsi'iit.-il. Family presumed. (Jeuera unrepresented. Family presumed. 



Noniuai, 1903. l>i*r<ifi<ixt>-cllaria D'Orbigny, 1851. 



Levim-en. 1909. Crepis Jullien, 1882. 



Adi.-nifi-ru Ciiuu and Bassler, 1017. Helivduma Calvet, 1907. 



Viipiilndriii, new wuus. 

 Aciintlioili'xia, new genus. 

 Trochopora D'Orbiguy. 1852. 

 utiiiiicUn Ciiuu and Bassler, 1017. 



Section II. Ovicell endozooecial. 



HiHckxinii Norman, I'.iti:!. Flustridae ( Norman >. St'togclliita Calvet, 1907. 

 Mcnilircndoccium Cann and Bassler. 1917, F:ir- 



ciiuinariidae. 

 (ii/i riiliiiii Ciuiu anil I'.assler. 1917. OnyclioceV- 



lidae. 

 Vilii-iKTlliiia Cnnu ami F.assler. 11)17. Lnnnla- 



riidae. 



Section III. Ovicell hyperstomial, closed by the opercular valve. 



rri-iiini-finflln Canu and Bassler, 1917. special Treinmifini Ortnian, 1S90. I'.irrllariidae (Levin- 



family. sen i. 



EllixiiKi Norman. 1903. Lnrinn-iiin Norman, 1903, special family. 



f!i'(iiiini(llii Cann, 1917. 

 Mriiilirniiiiinriflni ("'aim and Rassler. 1917. 



Section IV. Ovicell hyperstoraial, not closed by the opercular valve. 



Aldtriiiii Norman. 1903. AnniintapJiora Norman, 1903. 



Cullopora Gray, 1S48. Murxxoimpura Lang, 1914. 



Tctirlla Li-vinseii, 1909. 

 Aiiipliililcxtnini Cray, 184S. 

 h'liiiipliiiiintiix Norman, 1894. 

 si/'iui'iKii-i-llii ("'Mini and Bassler. 1917. Bicel- 

 lariidne. 



Section V. Miscellaneous. 



f'liiiliii-nttiphus Norman. 1903. Forrnlnrin Busk, 1883. 



Mrnitinixti-iHj Jullien, 1903. 

 Antrnpnrn Norman. 1903. 



Tho dorsal of some Meinhrnninorne present Certain thinninfr or thickening, ns in 

 A nti'o/Kii'ii granulifera Xorman (fi<j;. 23). This phenomenon manifests itself on the 

 fossils by little cavities or impressions. AVe have found them in Alderina nodulosa, 

 new species (fig. 23). Their physiological significance is unknown. 



The dorsal of the Memliraniporae U!M> -lio\\x the dietellae visihle by transpar- 

 ency. On well-preserved fossils they can be best revealed by abrading the surface 

 slightly. Beissel employed a quite complex but very instructive method of casting 

 in order to show these structures (fig. 23). 



