26 BULLETIN 10 4, UNITED STATES NATIONAL MUSEUM 



in one plane, inflated ; sutures distinct, slightly depressed ; wall smooth ; 

 aperture usually with a simple tooth. 



Diameter, 0.50 mm.; thickness, 0.25 mm. 



This species is recorded from numerous stations, especially about 

 the British Isles, but I have not found specimens which could be 

 referred to it from the western Atlantic. 



QUINQUELOCULINA DILATATA d'Orbigny 



Plate 2, Figures 5a,b 



Quinquelocidina dilatata d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. 

 Cuba, 1839, " Foraminiferes," p. 192, pi. 11, figs. 28-30. — Schlumberger, 

 M6m. Soc. Zool. France, vol. 6, 1893, p. 217, text figs. 29, 30; pi. 3, figs. 

 70-74; pi. 4, figs. 87-90.— Cushman, Proc. U. S. Nat. Mus., vol. 59, 1921, 

 p. 67, pi. 16, fig. 5; Publ. 311, Carnegie Instit. Washington, 1922, p. 69, 

 pi. 12, fig. 2. 



Test in front view broader than long; chambers compressed; periph- 

 ery rounded; sutures distinct, depressed; chambers with rounded 

 periphery, in the adult the last-formed chambers failing to make a 

 complete coil; surface smooth; aperture elongate, oval, with a tooth 

 some distance back from the aperture itself. 



Length, 0.45 mm.; breadth, 0.40 mm.; thickness, 0.25 mm. 



D'Orbigny first described this species from Cuba and St. Thomas. 

 I have it from Jamaica and the Tortugas, but it does not appear to 

 be anywhere common. There are records from the Mediterranean. 



SPECIES WITH SMOOTH SURFACE AND ACUTELY ANGLED 



PERIPHERY 



QUINQUELOCUUNA LAMARCKIANA d'Orbigny 



Plate 2, Figures 6 a-c 



Quinqueloculina laraarckiana d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat 

 Cuba, 1839, "Foraminiferes," p. 189, pi. 11, figs. 14, 15. — Cushman, Proc. 

 U. S. Nat. Mus., vol. 59, 1921, p. 65, pi. 15, figs. 13, 14; Publ. 311, Car- 

 negie Instit. Washington, 1922, p. 64; Publ. 342, 1924, p. 63; Publ. 344, 

 1926, p. 81. 



Quinqueloculina auberiana d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. 

 Cuba, 1839, "Foraminiferes," p. 193, pi. 12, figs. 1-3. 



Quinqueloculina cuvieriana H. B. Brady (not d'Orbigny), Rep. Voy. 

 Challenger, Zoology, vol. 9, 1884, p. 162, pi. 5, figs. 12 a-c. 



Test nearly as broad as long; chambers distinct; sutures slightly 

 depressed; chambers generally triangular in transverse section, the 

 angles subacute but not carinate; wall smooth and shiny; apertural 

 end of the chamber slightly extended, forming an elliptical neck with- 

 out a definite lip, but with a narrow elongate tooth. 



Maximum length, 1 mm.; breadth, 0.80 mm.; thickness, 0.50 mm. 



D'Orbigny described this species from shore sands of Cuba and 

 Jamaica, and Q. auberiana which is evidently the same is from Cuba 



