42 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



SPIEOLOCULINA sp. (?) 



Plate 10, Figure 8 



There is a single small specimen here figured, rather thick but very 

 short and nearly circular in outline. It is from Albatross Station 

 H3876, 1 mile off northwest entrance to Makemo Lagoon, Paumotus. 

 No other specimens were found to give further details as to the 

 characters of this form. 



Genus HAUERINA d'Orbigny, 1839 



Hauerina d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, "Foraminiferes," 

 pp. xxxviii, xxxix, 1839. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 

 9, p. 190, 1884.— Chapman, The Foraminifera, p. 97, 1902.— Cushman, Cusb- 

 man Lab. Foram. Res. Spec. Publ. No. 1, p. 150, 1928; U. S. Nat. Mus. 

 Bull. 104, pt. 6, p. 46, 1929. 



Genoholotype. — Hauerina compressa d'Orbigny. 



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 

 that more than two chambers make a coil. With this change in 

 structure is developed a strongly cribrate aperture. 



Some of the species, especially Hauerina ornatissima, are very com- 

 mon in the shallow waters of the Indo-Pacific. 



HAUERINA FRAGILISSIMA (H. B. Brady) 



Plate 10, Figure 9 



Spiroloculina fragilissima H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 p. 149, pi. 9, figs. 12-14, 1884.— Chapman, Journ. Linn. Soc. Zool., vol. 28, 

 p. 398, 1902.— Dakin, Rep. Pearl Oyster Fisheries Ceylon, p. 230, 1906. 



Hauerina fragilissima, Millett, Journ. Roy. Micr. Soc, p. 610, pi. 13, figs. 8-10, 

 1898. — Heron-Allen and Earland, Trans. Zool. Soc. London, vol. 20, 

 p. 587, pi. 46, figs. 1, 2, 1915.— Cushman, Proc. U. S. Nat. Mus., vol. 56, p. 

 638, 1919 ; Journ. Washington Acad. Sci., vol. 10, p. 200, 1920 ; U. S. Nat. 

 Mus. Bull. 100, vol. 4, p. 451, 1921 ; U. S. Geol. Survey Prof. Paper 129-B, p. 

 103, pi. 27, fig. 3, 1922 ; Carnegie Inst. Washington Publ. 342, p. 68, pi. 25, 

 figs. 2, 3, 1924. 



Test much compressed, nearly circular ; early chambers quinqueloc- 

 uline, later ones, which make up the larger part of the adult test, 

 spiroloculine ; periphery rounded; sutures very slightly if at all de- 

 pressed ; wall very thin, opalescent ; the sutures standing out as white 

 opaque lines ; aperture cribrate. Diameter, 0.6 mm. 



