116 



BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



The early chambers of this species are not compressed as in the 

 following species, but are of nearly equal diameter to those of the 

 uncoiled portion. The species is represented by few specimens, but 

 seems to be well distributed. There is some considerable variation 

 in the color and texture of the material forming the wall. There is 

 usually a rather small amount of cement visible, so that the finish of 

 the surface of the wall depends upon the character of the material. 

 Where the wall is smooth the chambers may easily be made out, but 

 in the rougher specimens it is hard to distinguish their limits. 



AMMOBACULITES FOLIACEUS (H. B. Brady). 



Haplophragmiumfoliaceum H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, 

 p. 50; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 304, pi. 33, figs. 20-25.— 

 Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 276, pi. 19, fig. 6. 



Description. — "Test crosier-shaped, complanate, very thin, flat on 

 both sides; consisting of numerous segments, the earlier ones forming 



178 



Figs. 177-179.— Ammobaculites foliaceus. x 40 (after Brady). 177 and 17S, side views; 179, 



SPECIMEN MOUNTED IN CANADA BALSAM AND VIEWED BY TRANSMITTED LIGHT. 



two or three convolutions of a flat spire, the later ones arranged in a 

 broad, straight, linear series. Segmentation distinct; peripheral 

 edge slightly constricted at the sutures ; septal lines arched. Aperture 

 simple, terminal." 



Length fa inch (1.25 mm.). 



Distribution. — Brady records this species from a single Challenger 

 station, No. 232, in 345 fathoms, on the Hyalonema ground, south of 

 Japan. The specimens are recorded as "of poor dimensions and few 

 in number." 



