16 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



Soc. London, vol. 20, 1915, p. 679; Journ. Roy. Micr. Soc, 1916, p. 49; 

 Trans. Linn. Soc. London, ser. 2, vol. 11, 1916, p. 267. — Sidebottom, 

 Journ. Roy. Micr. Soc, 1918, p. 149. — Cushman, Publ. 291, Carnegie 

 Inst. Washington, 1919, p. 39; Proc. U. S. Nat. Mus., vol. 56, 1919, 

 p. 621; Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 289; Proc. U. S. 

 Nat. Mus., vol. 59, 1921, p. 55, pi. 12, fig. 6; Publ. 311, Carnegie Inst. 

 Washington, 1922, p. 36, pi. 14, figs. 1, 2. 



Description. — Test composed of several inflated chambers arranged 

 in an elongate trochoid spire of about three volutions, each with 

 three chambers; walls reticulate, with spines in pelagic specimens; 

 aperture an arched opening at the umbilical border of the chamber, 

 and in the later chambers this is supplemented by two or more 

 nearly circular openings on the upper border of the chamber near its 

 connection with the preceding chambers; color of the early chambers, 

 sometimes all the chambers, pink. 



Length about 0.75 mm.; diameter about 0.50 mm. 



Distribution. — This w^as originally described by D'Orbigny from 

 the West Indian region. In the Caribbean, the Gulf of Mexico, and 

 in the path of the Gulf Stream this species is often very abundant. 

 It has a very brightly colored test when well preserved and specimens 

 are fairly fresh. 



It becomes less well developed in more northern bottom samples, 

 and although its range extends to the western coast of Europe, it 

 was always taken in the tow nets in the Tortugas region, which is on 

 the border of the Gulf Stream. 



Outside the West Indian region the red color seems to be largely 

 wanting and it may be that the species in its typical form is confined 

 to the Atlantic. 



Pelagic specimens have a distinctly spinose test. 



Globigerina rubra — material examined. 



Station. 



D201S. 

 D2029- 

 D2034. 

 D2035. 

 D2039. 

 D2041. 

 D2042. 

 D2043. 

 D2046. 

 D2048. 

 D2050. 

 D2052. 

 D2063. 

 D2093. 

 D2097. 

 D2105. 

 D2106. 

 D2109. 

 D2111. 

 D2112. 

 D2115. 



37 12 22 N. 

 39 42 00 N. 

 39 27 10 N. 

 39 26 16 N. 



38 19 26 N. 



39 22 50 N. 

 39 33 00 N. 



39 49 00 N. 



40 02 49 N. 

 40 02 00 N. 

 39 42 50 N. 

 39 40 05 N. 

 42 23 00 N. 

 39 42 50 N. 

 37 56 20 N. 

 37 50 00 N. 

 37 41 20 N. 

 35 14 20 N. 

 .35 09 50 N. 

 35 20 50 N. 

 35 49 30 N. 



74 20 04 W. 

 70 47 00 W. 



69 56 20 W. 



70 02 37 W. 

 68 20 20 W. 

 68 25 00 W. 

 68 26 45 W. 

 68 28 30 W. 

 68 49 00 W. 



68 50 30 W. 



69 21 20 ^V. 



69 21 25 W. 

 66 23 00 W. 



71 01 20 W. 



70 57 30 W. 

 73 03 50 W. 



73 03 20 W. 



74 59 10 W. 



74 57 40 W. 



75 18 00 W. 

 74 34 45 W. 



Character of 

 bottom. 



bu. m 



glob. oz. . . 

 glob. oz. . . 

 glob. oz. . . 



glob, oz 



glob. oz. . . 

 glob. oz... 



bu. m 



crs. s 



glob. oz. . . 

 glob. oz. . . 

 s., crs. g... 



for., s 



glob. oz. . . 

 glob. oz. . . 

 glob. oz. . . 



bu. m 



gn. . m. .. 

 s., blk. sp. 

 m., fne. s.. 



Abundance. 



Rare. 



Few. 



Common. 



Few. 



Abundant. 



.Abundant. 



Abundant. 



Abimdant. 



Few. 



Rare. 



Abundant. 



Abundant. 



.\bundant. 



.\bundant. 



Abundant. 



Common. 



jVbundant. 



Abundant. 



Abundant. 



Common. 



Rare. 



