18 



BUIXETIN 104, UNITED STATES NATIONAL MUSEUM. 



These forms all agree in one important detail, that of the form of 

 the apertural end of the chambers, which are tapering with straight 

 sides and the end broadly truncate, giving a large aperture. The 

 figures given by Goes show an entirely different form and I do not 

 think belong to this species, even in a broad sense. Egger's figures 

 are very greatly lacking in character, but none of them represent any- 

 thing that seems to me to belong here. 



Reophax nodulosits — material examined. 



REOPHAX DENTALINIFORMIS H. B. Brady. 



Plate 5, figs. 4, 5. 



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

 p. 49; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 293, pi. 30, figs. 21, 22.— 

 Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 25, No. 9, 1894, p. 25, pi. 6, 

 figs. 172-175.— ScHLUMBERGER, Mem. Soc. Zool. France, vol. 7, 1894, p. 239. — 

 Chapman, Proc. Zool. Soc. London, 1895, p. 15. — Goes, Bull. Mus. Comp. 

 Zool., vol. 29, 1896, p. 27.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 274, 

 pi. 18, fig. 2. — ^IVIiLLETT, Journ. Roy. Micr. Soc, 1899, p. 254. — Cushman, Bull. 

 71, U. S. Nat. Mus., pt. 1, 1910, p. 87, fig. 121.— Awerinzew, Mem. Acad. 

 Imp. Sci. St. Petersbourg, ser. 8, vol. 29, No. 3, 1911, p. 15. — Rhumbler, 

 Foram. Plankton Exped., teil 1, 1911, pi. 8, figs. 21, 22; teil 2, 1913, p. 473.— 

 Pearcey, Trans. Roy. Soc. Edinburgh, vol. 49, 1914, p. 1006. — Chapman, 

 Zool. Results "Endeavour," vol. 1, pt. 3, 1915, p. 310. 



Reophax nodulosa Bagg (not H. B. Brady), Proc. U. S. Nat. Mus., vol. 34, 1908, 

 p. 23. 



Description. — Test slender, tapering, composed of a few (5-6) 

 chambers, increasing progressively in length as added, slightly tumid 

 in the middle, contracted slightly at the ends ; arranged in a straight 

 or slightly curved line ; wall of rather coarse sand grains but cemented 

 to give a smooth even surface, apertural end tapering rather abruptly 

 to a short c^dindrical neck; aperture circular, color gray. 



Length up to 2 mm. 



Distribution. — This is a species of wide distribution unless as may 

 be suspected more than one species has been included under this name. 

 I have tried to restrict it to those rather small and delicate specimens 

 with the tapering form and elongate last chamber figured by Brady. In 



