TROPICAL PACIFIC FORAMINIFERA OF ALBATROSS 67 



Earland) ; Hongkong Harbor, Philippines, and Samoa (Cushman). 

 The only specimens found in all the samples examined in the present 

 collections are from Levuka, Fiji, in 12 fathoms, but these are very 

 typical. 



Family OPHTHALMIDIIDAE 



Test calcareous, imperforate, early chambers at least planispiral, 

 except in degenerate forms; wall without an arenaceous coating; 

 aperture typically open, without a tooth. 



Subfamily Cornuspirinae 



Test made up of a proloculum and an elongate, planispiral, tubular 

 second chamber. 



Genus CORNUSPIRA Schultze, 1854 



Comuspira Schui/tze, Organismus Polythal., p. 40, 1854. — H. B. Brady, Rep. 

 Voy. Challenger, Zoology, vol. 9, p. 198, 1884. — Chapman, The Foraminifera, 

 p. 99, 1902.— Cushman, Cushinan Lab. Foram. Res. Spec. Publ. No. 1, p. 160, 

 1928 ; U. S. Nat. Mus. Bull. 104, pt. 6, p. 78, 1929. 



Orbis (part) Philippi, Enurn. Moll. Siciliae, vol. 2, p. 147, 1844. 



Operculina (part) Czjzek, Haidinger's Nat. Abb.., vol. 2, p. 146, 1848. 



Spirillina (part) Williamson, Rec. Foram. Great Britain, p. 91, 1858. 



Genotype. — By designation, Comuspira planorbis Schultze. 



Test consisting of a proloculum followed by a long planispirally 

 coiled second chamber, rounded or complanate; wall calcareous, im- 

 perforate; aperture formed by the open end of the chamber, some- 

 times constricted and with a thickened lip. 



This genus is represented in the South Pacific by but a single 

 species in our collections. 



CORNUSPIRA INVOLVENS Rensg 



Plate 16, Figures 2 a, b 



For complete references to this species see Cushman, U. S. Nat. Mus. Bull. 104, 

 pt. 6, pp. 80-81, 1929. 



Test nearly circular in side view, consisting of a proloculum and a 

 long closely coiled, planispiral second chamber of nearly equal diame- 

 ter throughout, slightly involute; suture distinct, somewhat de- 

 pressed; wall smooth and polished, occasionally showing slight lines 

 of growth; aperture nearly the size of the open end of the tube. 

 Diameter of our South Pacific specimen, not exceeding 0.35 mm. 



This is a common and widely distributed species, but in our mate- 

 rial never reaches any considerable size. Specimens are common off 

 Fiji near Nairai, 12 and 24 fathoms; off Levuka, 12 fathoms; off 



