52 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



those of the adult uniserial, broad, extending across the width of the 

 test, sHghtly curved backward at the ends; sutures somewhat Hm- 

 bate, wall thin and translucent, finely perforate ; apertures numerous 

 on the terminal wall of the last-formed chamber. 



Length up to 0.5 mm. 



Distribution. — Type-specimen (U.S.N.M. No. 17272) from off Sand 

 Key, Florida, in 92 fathoms (169 meters). Specimens have also 

 occurred off Ragged Key, Florida., in 75 fathoms (137 meters), off 

 Fowey Rocks, 55 fathoms (99 meters), and in shallow water of the 

 Tortugas lagoon. Brady records P. fiahelliformis from Challenger 

 station 24, in 390 fathoms (713 meters), off Culebra Island in the 

 West Indies. This is probably the same as this species here de- 

 scribed, as all the Florida material I have seen appears to be of this 

 new species, not showing at all the embracing character of P. 

 jldbelliformis. 



Pavonina atlantica — material examined. 



Genus CUNEOLINA d'Orbigny, 1839. 



Cuneolina d'Orbigny (tj'-pe, Cuneolina pavonina d'Orbigny), in De la Sagra. 

 Hist. Fia. Pol. Nat. Cuba, 1839, " Foraminifferes, " p. 150; Foram. Foss. Base. 

 Tert. Vienne, 1846, p. 253.— Chapman, The Foraminifera, 1902, p. 166. 



Description. — Test biserial, tapering, broadest near the apertural 

 end, compressed so that the two alternating series of chambers form 

 a zigzag line on the narrow sides of the test; chambers numerous, 

 low, and very broad, wall arenaceous, composed of very thin material, 

 smooth, chamber wall labyrinthic, composed of numerous openings, 

 the smaller near the exterior; aperture elongate, narrow, either 

 simple or a row of pores. 



This genus was erected by d'Orbigny for certain Cretaceous spe- 

 cies. There are certain species in the West Indies which occur in the 

 late Tertiary which seem close to this genus in several ways. They 

 have been referred to d'Orbigny's type species, but are evidently 

 different, as will be noted later. 



