624 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



pi. 85, figs. 1-5.— CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 5, 1915, p. 3, pi. 1, 

 figs. 1, 2.— SiDEBOTTOM, Joum. Roy. Micr., Soc, 1918, p. 250. 



There are five specimens on the shde, all of the same form and 

 general characters. The test is very thin and transparent, and 

 prominently, but finely perforate. The keels are more or less 

 irregular, occasionally somewhat angled in places. 



SPIRILLINA DECORATA H. B. Brady. 



Spirillina decorata H. B. Brady, Rep. Voy. Challenger, Zoologj^ vol. 9, 1884, 

 p. 633, pi. 85, figa. 22-25.— Cushman, Bull. 71, U. S. Nat. Mus., pt. 5, 1915, p. 7, 

 pi. 5, figs. 1, 2.— SiDEBOTTOM, Joum. Roy. Micr. Soc, 1918, p. 250. 



There is a single specimen which is evidently this species. It, 

 however, agrees with the two smaller tests mentioned by Sidebottom, 

 resembling S. limhata var. denticulata. 



SPIRILLINA LIMBATA H. B. Brady, var. DENTICULATA H. B. Brady. 



Spirillina limhata H. B. Brady, var. denticulata H. B. Brady, Rep. Voy. dial- 

 Unger, Zoology, vol. 9, 1884, p. 632, pi. 85, fig. 17.— Cushman, Bull. 71, U. S. 

 Nat. Mus., pt. 5, 1915, p. 5, pi. 3, figs. 1, 2. 



There are two specimens very clearly this species. They are 

 mounted with the typical form. Both of these specimens are 

 broadest on the ventral side which is acutely angled. 



Subfamily Rotalinae. 



Genus DISCORBIS Lamarck, 1804. 



DISCORBIS TURBO (d'Orbigny). 



Rotalia (Trochulina) turbo d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 274, No. 



39; Modules, No. 73. 

 Discorbina turbo Carpenter, Parker, andJoNES, Introd. Foram., 1862, p. 200. — 



H. B. Brady, Rep. Voy. Challenger, Zoologjs vol. 9, 1884, p. 642, pi. 87, figs. 



Sa-c. 

 Discorbis turbo Cushman, Bull. 71, U. S. Nat. Mus., pt. 5, 1915, p. 10, pi. 11, 



fig. 2. 



A single very typical specimen is mounted. This species is not 



mentioned either by Chapman or Sidebottom, but was dredged by 



the Challenger off Australia in shallow water. I had the species 



from the Hawaiian Islands and Japan, showing that it has a wide 



range in this faunal area. 



DISCORBIS ROSACEA (d'Orbigny). 



Rotalia rosacea d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 273, No. 15. 



Discorbina rosacea U. B. Brady, Trans. Linn. Soc, vol. 24, 1864, p. 473, No. 69; 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 044, pi. 87, figs. 1, 4.— Side- 

 bottom, Journ. Roy. Micr. Soc, 1918, p. 252. 



Discorbis rosacea Cushman, Bull. 71, U. S. Nat. Mus., pt. 5, 1915, p. 13, fig. 13, 

 (in text). 



There are two sets of specimens mounted, one of which evidently 

 represents dead shells without color; the other, live ones in which 



