4 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



much curved, chambers about 10 in number which is several fewer 

 than in the type figure. 



NONION POMPILIOIDES (Ficbtel and Moll) 



Plate 1, figures 7-11; Plate 2, figures 1-2 



"Nautilus Melo" Soldani, Testaceographia, vol. 2, 1798, p. 38, pi. 8, figs. 



ZZ, A. B.C. 

 Nautilus pompilioides FiCHTELand Moll, Test. Micr,, 1798, p. 31, pi. 2, figs. 



a-c. 

 Nonionina pompilioides Parkeh, Jones, and H. B. Brady, Ann. Mag. Nat. 



Hist., ser. 4, vol. 8, 1871, p. 246, pi. 12, fig. 158.— Terrigi, Atti Accad. 



Pont. Nuovi Lincei, vol. 35, 1883, p. 204, pi. 4, fig. 49.— H. B. Brady, Rep. 



Voy. Challenger, Zoology, vol. 9, 1884, p. 727, pi. 109, figs. 10, 11. — 



CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 4, 1914, p. 25. pi. 17, fig. 2 a, b. 

 Melonis etruscus Montfort, Conch. Syst., 1808, p. 67, XVII« genre. 

 Polystomella etrusca Defrance, Diet. Sci. Nat., vol. 32, 1824, p. 183. 

 Nonionina umbilicatula d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 293, pi. 15, 



figs. 10-12, Modules No. 86. 

 Nonionina melo d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 293. 



Test planispiral, bilaterally symmetrical, entirely involute, except 

 that the umbilici are deeply excavated, periphery very broadly 

 rounded, entire; chambers 8 to 10 in the last-formed coil, of the same 

 general shape, not inflated; sutures flush with the surface, generally 

 limbate, fusing along the umbilicus to form a slight thickening about 

 it but not raised above the surface; wall smooth, coarsely perforate; 

 aperture slit-like between the base of the apertural face and the previ- 

 ous con, apertural face broad and low. 



This species described by Fichtel and Moll from Recent specimens 

 from the Mediterranean and Pliocene ones from Coroncina, Italy, 

 has been widely recorded. It is not common, however, in the Western 

 Atlantic, but does occur typically, especially in the Late Tertiary of 

 Italy. Joseph Wright recorded a specimen from southwest of Ireland, 

 1,020 fathoms,^ and Heron-Allen and Earland a single specimen from 

 the Clare Island region of Ireland.^ 



It occurs sparingly in deep water material. Brady records it in the 

 Challenger material from seven stations in the North Atlantic ranging 

 from 1,000 to 2,750 fathoms, and one in the South Atlantic 2,200 

 fathoms. 



The species is similar to N. umbilicatulum (Walker and Jacob) but is 

 a much broader, more globular form and the umbilicus is not usually 

 so open. 



It is probable that Nonionina soldanii d'Orbigny from the Vienna 

 Basin Miocene belongs here also. 



* Proa Roy. Irish Acad., ser. 3, vol. 1, 1891, p. 492. 



* Idem, VOL 31, pt. 64, 1913, p. 143* 



