FORAMINIFERA OF THE BYRAM CALCAREOUS MARL AT BYRAM, MISS. 



105 



water. It may be that the Byram specimens 

 and the one I have figured from waters off the 

 Hawaiian Islands, together with that figured by 

 Millett, really constitute a tropical species dif- 

 ferent from that of British waters. 



Triloculina trigonula (Lamarck) D'Orbigny. 



Miliolites trigonula Lamarck, Aimales du Mus., voL 5, p. 



351, No. 3, 1804; .\nimaux sans vertelires, voL 7, p. 



612, No. 3, 1822. 

 Triloculina trigonula (Lamarck) D'Orliigny. Annales sci. 



nat., vol. 7, p. 299, No. 1, pL 16, figs. 5-9, Modoles, 



No. 93, 1826. 



A single specimen of this species was found in 

 the marl at Byram. It is a short, rather ro- 

 tund form. 



Genus BILOCITLINA D'Orbigny, 1826. 

 Biloculina sp.? 



Plate XXVIII, figures 5, (i. 



There are a very few specimens of a small ro- 

 tund Biloculina in the Byram marl. They are 

 smooth with a large aperture and a tooth very 

 small in comparison, as shown in the figure. 



