598 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



This is a peculiar species in the few coils of the test ; especially in 

 the megalospheric form, and with its very protuberant center it is 

 nearly one-third again as wide in the center as in the outer portion. 

 In the microspheric form the whole test is of even color except the 

 border of each coil and the end of the last-formed coil, which are 

 lighter colored. In the megalospheric form the proloculum and the 

 begimiing of the first coil are dark reddish brown. This does not seem 

 at all like any of the other species of Ammodiscus that I have seen 

 from any part of the world. It is probably a species limited to the 

 Australian or Indo-Pacific region. Chapman ^ records Ammodiscus 

 tenuis H. B. Brady, from his station off New Zealand, which may 

 possibly be the same as this described here. 



Type.— C&t. No. 14745, U.S.N.M. 



Family LITUOLIDAE. 

 Subfamily Reophacinae. 



Genus REOPHAX Montfort, 1808. 



BEOPHAX SPICULIFERA H. B. Brady. 



Reophax spiculifera H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 1879, p. 54, 

 pi. 4, figs. 10, 11; Rep. Voy. Challenger, Zoology vol. 9, 1884, p. 295, pi. 31, 

 figs. 16, 17.— CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 92. 



There are numerous specimens in the material which can be 

 referred to this species. They are made entirely of elongate sponge 

 spicules, very neatly cemented; occasionally the end of the spicules 

 extends backward from the chamber, as in Brady's figure. The 

 specimens, however, are much larger. 



REOPHAX SPICULIFERA H. B. Brady, var. PSEUDODISTANS. new variety. 



Plate 75, fig. 1. 



Description. — Among the material are specimens in shape very 

 close to R. distans, but the entire test is made up of sponge spicules 

 and are evidently related to R. spiculifera H. B. Brady. The test is 

 easily broken and numerous single chambers are found in the mate- 

 rial. 



Type.—Cat. No. 14743, U.S.N.M. 



REOPHAX SCORPIURUS (7) Montfort. 



Reophax scorpiurus Montfort, Conch. Syst., vol. 1, 1808, p. 330, 83me genre. — 

 H. B. Brady, Rep. Voy. ChalUiiger, Zoology, vol. 9, 1884, p. 291, pi. 30, figs. 

 12-17.— CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 83, figs. 114, and 

 116 (in text). 



Some specimens in the material have the general form of this 

 species as figured by Brady. They are made up of sponge spicules 



> Trans. New Zealand Instit., vol. 38, 1905, p. 85. 



