10 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



Some authors have attempted to separate forms from this genus 

 that are described as having a simple sHtUke aperture instead of a 

 radiate one. In our experience the median ventral slit of the radiat- 

 ing aperture is almost always enlarged and more elongate, but no 

 examples have been noted where the other shorter radiating slits were 

 absent. It is therefore questionable whether this distinction is a 

 valid one, particularly as the type species of Saracenaria normally has 

 this enlargement. 



SARACENARIA sp. (?) 



Plate 2, Figures 8a, b 



The figured specimen represents all that is known of this particular 



form in the Albatross collections, and it seems to be a distinct form 



rather well ornamented with the raised sutures and strongly developed 



keel, and worthy of record here. It is from Albatross Station 



H3876, northwest entrance of Makemo Lagoon, 1 mile SE., in 467 



fathoms. 



Genus LINGULINA d'Orbigny, 1826 



Lingulina d'Orbigny, Ann. Sci. Nat., vol. 7, p. 256, 1826. 



Synonyms: Nodosaria (Mucronina) d'Orbigny, 1826; LinguUnopsis Reuss, 1860. 



Genotype. — By designation, Lingulina carinata d'Orbigny. 



Test in the early stages, at least in the microspheric form, plani- 

 spiral, later ones in a rectilinear series, compressed; aperture becoming 

 elongate, elliptical. Permian to Recent. 



The microspheric forms often attain large size and show a number 

 of coiled chambers at the base, a fact that has been recently reaffirmed 

 by Hofker in his work on tropical Pacific material. 



LINGULINA GLANDIGENA (Schwager) 



Plate 2, Figures 9a, b 



The peculiar small form figured here seems to be referable to 

 Schwager's species. It is very small, measuring only 0.35 mm in 

 length, and has a few simple chambers, somewhat compressed, and a 

 terminal simple aperture. The sutures are slightly depressed and 

 somewhat convexly curved. The wall of the test is smooth. The 

 only specimens are the figured one from Albatross Station II3832, 

 latitude 15° 33' S., longitude 148° 45' W., in 2,267 fathoms, and one 

 from Station II3812, entrance to Avatoru Pass, Rahiroa Atoll, 7.5 

 miles S., in 819 fathoms. 



Genus DENTALINA d'Orbigny, 1826 



Dentalina d'Orbigny, Ann. Sci. Nat., vol. 7, p. 254, 1826. 



Genotype. — By designation, Nodosaria (Dentalina) obliqua d'Orbigny. 



Test arcuate, elongate, of numerous chambers in a linear series; 



sutures usually oblique, at least in the early portion; aperture radiate. 



