FORAMINIFERA OF THE ATLANTIC OCEAN 99 



Globorotalia truncatulinoides — Material examined — Continued 



GLOBOROTAUA HIRSUTA (d'Orbfgny) 



Plate 17, figures 6 a-c 



Rotalina hirsuta d'Orbigny, in Barker-Webb and Berthelot, Hist. Nat. 

 lies Canaries, vol. 2, pt. 2, "Foraminifdres," 1839, p. 131, pi. 1, figs. 37-39. 



Test trochoid, biconvex, the spire distinct in the middle but the 

 last-formed whorl much compressed, periphery lobulated, not cari- 

 nate; chambers usually only four in the last-formed whorl, elongate, 

 greatly increasing in size, the last-formed one in the adult making up 

 half the test on the ventral side; sutures depressed, not limbate, 

 strongly curved on the dorsal side, nearly radial ventrally; wall 

 roughened with minute papillae; aperture ventral, a low arch on the. 

 border of the chamber. 



Diameter up to 0.85 mm. 



This species has been entirely neglected. It was described by 

 d'Orbign}^ from the Canaries. Rotalina canariensis of the same report 

 was taken up by other authors, and the form belonging to G. hirsuta 

 was assigned to G. canariensis by Brady and well figured in the 

 Challenger Report (pi. 105, figs. 8, 9). From the original figure of 

 Rotalina canariensis d'Orbigny, it is close to if not identical with 

 Globorotalia menardii, although d'Orbigny speaks of it as distinctly 



