FORAMINIFERA OF THE ATLANTIC OCEAN 39 



Test much elongate, in the adult spiroloculine, from one side very- 

 much excavate, the other nearly plane, early chambers quinquelocu- 

 line, later ones spiroloculine, chambers very elongate, irregularly 

 quadrate in transverse section, the peripheral side broader than the 

 inner ones, one of the sides angled, the other straight; surface pol- 

 ished, shiny, but with numerous fine, Hnear depressions breaking the 

 evenness of the surface; aperture rounded, apertural end of the test 

 somewhat projecting; color glistening white. 



Length, 1.5 mm.; breadth, 0.65 mm.; thickness, 0.30 mm. 



This species was originally described from the north coast of 

 Jamaica at Montego Bay where it occurred at several stations. It 

 has not occurred elsewhere. 



MASSILINA ALVEOLINIFORMIS Millett 



Massilina alveoliniformis Millett, Journ. Roy. Micr. Soc, 1898, p. 609, pi. 



13, figs. 5-7. — Heron-Allen and Earland, Trans. Zool. Soc. London, 



vol. 20, 1915, p. 584, pi. 45, fig. 15.— Cushman, Publ. 311, Carnegie Instit. 



Washington, 1922, p. 69; Publ. 342, 1924, p. 64. 

 Spiroloculina asperula H. B. Brady (not Karrer), Rep. Voy. Challenger, 



Zoology, vol. 9, 1884, p. 152, pi. 8, figs. 13, 14 (11?).— Cushman, Proc. 



U. S. Nat. Mus., vol. 59, 1921, p. 72. 

 Massilina asperula Cushman, Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 



447. 



Test much compressed, nearly circular; early chambers quinque- 

 loculine, later ones in a single plane, periphery rounded, chambers 

 distinct; wall of sand grains with a porcellanous lining to the cham- 

 bers; aperture very slightly exserted. 



Length up to 1 mm.; breadth, 0.90 mm.; thickness, 0.25 mm. 



This species is rather widely distributed in the Indo-Pacific but in 

 the Atlantic appears only in the West Indian region. It may be 

 more common in the West Indies than the records seem to indicate 

 but the only known localities are three stations in the Tortugas 

 region. 



MASSILINA ANNECTENS Schlumberger 



Massilina anneciens Schlumberger, Mem. Soc. Zool. France, vol. 6, 1893, 

 p. 220, pi. 3, figs. 77-79, text figs. 35-37. — Sidebottom, Mem. Proc. Man- 

 chester Lit. Philos. Soc, vol. 48, No. 5, 1904, p. 18, pi. 5, figs. 2-4.— 

 Heron-Allen and Earland, Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, 

 p. 34, pi. 1, figs. 9-11.— Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, 

 p. 57, pi. 20, figs. 3a-c. — Martinotti, Atti Soc. Ital. Sci. Nat., vol. 59, 

 1920, p. 320, text fig. 148.— Cushman, Publ. 342, Carnegie Instit. Wash- 

 ington, 1924, p. 66. 



The only Atlantic record for this species is that of Heron-Allen 

 and Earland from a single station in the Clare Island region of Ireland. 

 The other records are from the Mediterranean and Indo-Pacific. 



The species is apparently just taking on its Massilina stage as only 

 the last chambers are in a single plane. The chambers are angled 

 with a broad, often concave, peripheral face. 



