46 BULLETIN 10 4, UNITED STATES NATIONAL MUSEUM 



35, 36 (expl. of plates). — A. Silvestri, Mem. Accad. Pont. Nuovi Lincei, 

 vol. 9, 1893, p. 190. — MiLLETT, Journ. Roy. Micr. Soc, 1898, p. 611, pi. 

 13, fig. 12.— Pearcey, Trans. Roy. Soc. Edinburgh, vol. 49, 1914, p. 996.— 

 Mestayer, Trans. New Zealand Instit., vol. 48, 1916, p. 128 (list). — Cush- 

 MAN, Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 412, pi. 85, figs. 1 a, b. 



Test generally lenticular, periphery rounded, the early chambers 

 arranged in a quinqueloculine manner, later ones in a single plane, 

 the number in a coil increasing until in the adult as many as six may 

 make up a complete coil; sutures indistinct; wall entirely calcareous, 

 imperforate, smooth, dull; aperture at the peripheral margin, arched, 

 with a flat, rounded tooth. 



Diameter, 2 mm.; thickness, 0.75 mm. 



This species was orginally described from the Miocene of the 

 Vienna Basin and has been recorded from the Miocene of adjacent 

 regions. As a living species it is known from several stations in the 

 north Atlantic, especially off Ireland and the Faroe Channel, from 

 the Mediterranean and the Indo-Pacific. 



NUMMOLOCUUNA IRREGULARIS (d'Orbigny) 



Plate 10, Figures 2, 3 



Biloculina irregularis d'Orbigny, Voy. Anier. Merid. Foraminiferes, 1839, p. 

 67, pi. 8, figs. 22-24. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 

 9, 1884, p. 140, pi. 1, figs. 17, 18. 



There are numerous records in the present oceans for this species 

 but a glance at the figures given will show that many of them do not 

 refer to the species as figured by d'Orbigny and by Brady. The 

 Challenger specimens figured by Brady show three chambers in the 

 adult in a single plane and may probably fit better into Nummolo- 

 culina than elsewhere. The apertural characters also are very 

 similar. 



There are a few Atlantic records for the species in fairly deep 

 water. 



Genus HAUERINA d'Orbigny, 1839 



Hauerina d'Orbigny (Genoholotype, Hauerina compressa d'Orbigny), in De 

 la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, " Foraminiferes," pp. xxxviii, 

 XXXIX. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 

 190. — Chapman, The Foraminifera, 1902, p. 97. — Cushman, Special Publ. 

 No. 1, Cushman Lab. Foram. Res., 1928, p. 150. 



Heierillina Munier-Chalmas and Schlumberger, Bull. Soc. Geol. France, 

 ser. 4, vol. 5, 1905, p. 131. 



Test with the early chambers quinqueloculine, later ones more or 

 less in one plane, making a half coil, later in some species gradually 

 shortening so that more than two make up one coil; aperture cribrate. 



Tertiary and Recent. 



This genus has developed from a quinqueloculine ancestry adding 

 the later chambers in a single plane and then reducing the length so 



