38 BULLETIN 10 4, UNITED STATES NATIONAL MUSEUM 



This is a very common species in the material from off the coasts 

 of western Europe and in the Mediterranean. It evidently extends 

 into the Indo-Pacific but does not seem to be present in the western 

 Atlantic, although Whiteaves recorded it from the Gulf of St. 

 Lawrence; but the record without confirmation is to be questioned. 



MASSILINA SECANS d'Orbigny, var. TENUISTRIATA Earland 



Massilina secans d'Orbigny, var. tenuistriata Earland, Journ. Quekett Micr. 

 Club, ser. 2, vol. 9, 1905, p. 198, pi. 11, fig. 5.— Heron-Allen and 

 Earland, Journ. Roy. Micr. Soc, 1909, p. 317; Proc. Roy. Irish Acad., 

 vol. 31, pt. 64, 1913, p. 34; Trans. Zool. Soc. London, vol. 20, 1915, p. 582, 

 pi. 44, figs. 28-31.— CusHMAN, Bull. 100, U. S. Nat. Mus., vol. 4,1921, 

 p. 445. — Heron-Allen and Earland, Bull. Soc. Sci. Hist. Nat. Corse, 

 1922, p. 122. 



Variety with the entire surface of the test covered with fine longi- 

 tudinal striae roughly parallel with the periphery but varying in 

 coarseness in different specimens. 



This variety is found on the eastern side of the Atlantic and in the 

 Mediterranean and Indo-Pacific but is not known from the western 

 Atlantic. 



The localities include: shore sand, Bognor, Sussex, England 

 (Earland); Selsey Bill, Sussex; Clare Island region of Ireland; 

 Corsica; Kerimba Archipelago (Heron-Allen and Earland), and the 

 Philippines (Cushman). 



MASSILINA CRENATA (Karrer) 



Plate 7, Figure 5 



Spiroloculina crenata Karrer, Sitz. Akad. Wiss. Wien, vol. 57, 1868, p. 135, 

 pi. 1, fig. 9. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 156, pi. 10, figs. 24-26. 



Massilina crenata Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, p. 57, pi. 

 20, fig. 2; Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 445; Publ. 311, Car- 

 negie Instit. Washington, 1922, p. 69, pi. 11, fig. 6; Publ. 342, 1924, p. 

 66, pi. 25, fig. 4. 



Test in its early development quinqueloculine, adult chambers in a 

 single plane, in front view subelliptical, nearly as broad as long, com- 

 pressed; chambers long and narrow, margin crenulate, due to the 

 regular contractions or plications of the chamber in the adult; aper- 

 ture rounded. 



Length, 0.65 mm.; breadth, 0.50 mm.; thickness, 0.20 mm. 



This is one of the species that is widely distributed in the Indo- 

 Pacific but only appears in the Atlantic in the West Indian region. 

 The only specimens are from the Tortugas region where the species 

 occurred at three stations. 



MASSIUNA INAEQUALIS Cushman 



Plate 7, Figures 6 a-c 



Massilina inaequalis Cushman, Proc. U. S. Nat. Mus., vol. 59, 1921, p. 72, 

 pi. 17, figs. 12, 13. 



