206 FORAMINIFERA 



Pelorus MONTFORT, 1. c, p. 23 (genoholotype, Nautilus ambiguus 



FiCHTEi. and Moll (part)). 

 Andromedcff Montfort, 1. c, p. 39 (genoholotype, Nautilus strigillatus 



FiCHTEL and Moll (part)). 

 Sporilus Montfort, 1. c, p. 43 (genoholotype, Nautilus strigillatus 



FiCHTEL and Moll (part)). 

 Themeon Montfort, 1. c, p. 203 (genoholotype, Themeon rigatus Mont-' 



FORT = Nautilus crispus Linne). 

 Cella7ithiis Montfort, 1. c, p. 207 (genoholotype. Nautilus craticulatus 



FiCHTEL and Moll). 

 Vorticialis Lamarck, Extrait Cours Zool., 1812, p. 122 (genotype, by 



designation, Naiitilus craticulatus Fichtel and MoLl;). 

 Pohjstomella Lamarck, Hist. Anim. sans Vert., vol. 7, 1822, p. 625 (geno- 

 type, by designation. Nautilus crispus Linne). 

 Robulina (part) Munster, 1838. 

 Geoponus Ehrenberg, Abhandl. k. Akad. Wiss. Berlin, for 1839 (1841), 



p. 132 (genoholotype, Geopomis steUa-borealis Ehrenberg). 

 Nonionina (part) Boll, 1846. 

 Helicozoa MoEBlus, Beitr. Meeresfauna- Insel. Mauritius, 1880, p. 103 



(genoholotype, Nautilus craticulatus Fichtel and Moll). 



Test typically planispiral, bilaterally symmetrical, mostly in- 

 volute; chambers numerous with distinct sutures either 

 depressed or raised and limbate, with septal bridges and depres- 

 sions; wall calcareous, perforate; apertures one or more at the 

 base of the apertural face. 



Jurassic to Recent. 



EXPLANATION OF PLATE 28 



Nonionidae 

 Fig. 



1. Nunion incisits Cushman. a, side view; b, apertural view. 



2. Cribrospira pander i Moller. (Adapted fi'oni Moller). a, apertural 



view; b, side view. 



3. Nonionella auris (d'Orbigny). a, b, opposite sides; c, apertural view. 



4. Br adyina nautili formis Moller. (Adapted from Moller). a, apertural 



view; b, side view. 



5. Elphidium macelhis (Fichtel and Moll), a, side view; b, apertural 



view. 



6. Polystomellina discorbinoides Yabe and Hanzawa. (After Yabe and 



Hanzawa). a, dorsal view; b, ventral view; c, peripheral view. 



7. Faujasina carinafa d'Orbigny. (After d'Orbigny). a, ventral view; 



6, dorsal view; c, peripheral view. 



