82 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



As a fossil genus Fronclicularia is very well represented from the 

 Triassic onward, being very abundant, both in number of species and 

 individuals in some horizons. In the present ocean, except in certain 

 restricted regions, it is almost unknown. There are but few living 

 species 



FRONDICULARIA BRADYI, new name. 



Plate 23, fig. 5; plate 39, fig. 5. 



Frondicularia spathulata H. B. Brady (not F. spathuLAa Willirmson) Quart. 

 Journ. Micr. Sci., vol. 19, 1879, p. 56, pi. 8, figs. 5a, b; Rep. Voy. Challenger, 

 Zoology, vol. 9, 1884, p. 519, pi. 65, fig. 18. — Sidebottom, Mem. Proc. Man- 

 chester Lit. and Philos. Soc, vol. 51, No. 9, 1907, p. 5, pi. 1, fig. 26. 



Description. — Test elongate, compressed, narrow; chambers com- 

 paratively few in number, proloculum largest, elliptical, more rotund 

 than the later chambers; chambers following the proloculum reflexed; 

 those of the later development often less so; aperture terminal, 

 elliptical; sutures slightly depressed; surface smooth. 



Length about 0.5 mm. 



Distribution. — Brady obtained material of this species from off the 

 Ki Islands, 129 fathoms, and off Raine Island, 155 fathoms. In the 

 Challenger Report, page 520, he also mentions the only North Pacific 

 record, as follows: "Mr. F. W. Millett has the same from the coast of 

 Korea, 40 fathoms." Sidebottom records the species from the coast 

 of the island of Delos (Grecian Archipelago) as very rare. His 

 specimen from the Bay of Palermo and Egger's single specimen from 

 the Gazelle expedition, both of which are referred to this species, 

 would seem best referred to F. nitida Terquem, as Millett has already 

 suggested in regard to Egger's specimen. The single specimen I 

 have had from the North Pacific and which is here figured is from 

 Nero station 990 in 859 fathoms, off Guam. 



The proloculum of this species is very interesting, with its very 

 thick wall and distinct canals. The following chambers are com- 

 paratively thin walled and lack the large canals of the proloculum. 



FRONDICULARIA ROBUSTA H. B. Brady. 



Plate 32, figs. 5, 6. 



Frondicularia robusta H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 523, pi. 66, figs. 1, 2. 



Description. — "Test elongate, compressed, stoutly built; lateral 

 margins nearly parallel, ends obtusely angular or rounded, peripheral 

 edges thick, rounded, slightly lobulated. Segments numerous; 

 nearly uniform in size after the initial stage, somewhat irregular in 

 contour, comparatively little bent. Surface furnished with closely 

 set, irregular or interrupted, longitudinal costse." 



"Length $ inch (3.6 mm.)." 



