b BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



depressed, not limbate; wall smooth, finely perforate; aperture, a 

 small opening at the base of the apertural face next to the preceding 

 coil. 



Both Nautilus scapJia and N. jaba of Fichtel and Moll seem to 

 represent the same species, and d'Orbigny's Nonionina communis 

 from the Vienna Basin is apparently the same from material exam- 

 ined. 



There are a great many records for Nonion .scapha in the literature, 

 but as very few of them are accompanied by illustrations, they can 

 not be definitely placed here until the material representing them can 

 be examined and checked. 



As already noted, there is a tendency toward N. asterizans especially 

 in the Italian region. 



NONION ASTERIZANS (Fichtel and Moll) 



Plate 2, figures 5-7 



Nautilus asterizans Fichtel and Moll, Test. Micr., 1798, p. 37, pi. 3, figs. 



e-h. 

 Nonionina asterizans Tebrigi, Atti Accad. Pont. Nuovl Lincei, vol. 33, 1880, 



p. 95, pi. 4, fig. 78. 

 Nonionina boueana d'Orbigny, Foram. Foss. Bass. Tert. Vienne, 1846, p. 108, 



pi. 5, figs. 11, 12. — Reusb, Bull. Acad. Roy. Sci. Belg., ser. 2, vol. 15, 



1863, p. 156, pi. 3, figs. 47, 48.— Terrigi, Mem. Com, Geol. Ital., vol. 



4, pt. 1, 1891, p. 110, pi. 4, fig. 17; Atti Accad. Lincei, ser. 4, Mem., 



vol. 6, 1893, p. 119, pi. 10, fig. 5.— Goes, Kongl. Svensk. Vet. Akad. 



Handl., vol. 25, No. 9, 1894, p. 104, pi. 17, fig. 829.— Fornasini, Mem. 



Accad. Sci. Istit. Bologna, ser. 5, vol. 8, 1900, p. 46, fig. 49 (in text). 

 Nonionina communis Terrigi (not d'Orbigny), Atti Accad. Pont. Nuovi 



Lincei, vol. 35, 1883, p. 205, pi. 4, fig. 51. 



Test planispiral, bilaterally symmetrical, completely involute or 

 very slightly evolute, periphery angular, umbUici depressed, often 

 with a few very small beads; chambers numerous, usually about 12 

 in the last-formed coil, broad and low, of uniform shape throughout; 

 sutures distinct, depressed, usually somewhat limbate, the broadest 

 part toward the inner end thence thinning toward the peripherj^, 

 evenly curved; wall smooth, except for the umbilical region which 

 occasionally has a few small beads, finely perforate; apertural face 

 convex, in peripheral view with the sides convex, aperture itself at 

 the base of the face next to the previous coil, short and narrow or 

 sometimes rounded. 



The originals of Fichtel and Moll came from the Mediterranean. 

 The species is common in the Pliocene of Italy and in the Pliocene and 

 Miocene of many parts of Europe. Many species have been placed 

 under this name that obviously do not belong here. d'Orbigny's 

 Nonionina houeana from the Vienna Basin Miocene does not differ 

 essentially from Fichtel and Moll's species. In fact, the figure 

 given by Fornasini from the "planches in^dites" has the umbilical 

 region slightly beaded. 



