NO. 1 CUSHMAN, MCCULLOCH : ARENACEOUS FORAMINIFERA 31 



Family Astrorhizidae 

 Genus ASTRORHIZA Sandahl, 1858 



Astrorhiza hancocki Cushman and McCulloch, new species 

 Plate 1, Fig. 1 



Test comparatively large, compressed, consisting of a central body 

 and numerous (10-12), somewhat irregularly conical projections from 

 the periphery; wall arenaceous, consisting of fine sand with included 

 fragments of various kinds with occasionally whole tests of small for- 

 aminifera, exterior rather rough ; apertures at the ends of the peripheral 

 projections. Diameter 3.00-4.50 mm. 



Holotype (AHF no. 1), Station 296, Agua Verde Bay, Lower 

 California, Mexico, 30 fms., type locality. 



Distribution. — Our present investigations record it only from the 

 type locality. 



This species differs from A. limicola Sandahl in the shorter, more 

 regularly conical peripheral projections and more flattened test. 



Genus RHABDAMMINA M. Sars, 1869 

 Rhabdammina abyssorum W. B. Carpenter 

 Plate 1, Figs. 2, 3 

 Rhabdammina abyssorum M. Sars, Forh. Vid. Selsk. Christiania, 



1868, p. 248 (nomen nudum). — W. B. Carpenter, Ann. Mag. Nat. 

 Hist., sen 4, vol. 4, 1869, p. 288; Proc. Roy. Soc. London, vol. 18, 



1869, p. 60.— G. O. Sars, Forh. Vid. Selsk. Christiania, 1871, pp. 250, 

 251. — Carpenter, The Microscope, ed. 6, 1881, pp. 562, 563, figs. 2>2\c, 

 d {in text). — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 266, pi. 21, figs. 1-13.— De Folin, Le Naturaliste, vol. 9, 1887, 

 p. 127, fig. \2a.—A. Agassiz, Bull. Mus. Comp. Zool., vol. 15, 1888, 

 pp. 162, 163, figs. 492, 493 (in text). — Neumayr, Stamme Thierreichs, 

 vol. 1, 1889, p. 173, fig. 17^ (in text). — Egger, Abh. Bay. Akad. Wiss. 

 Munchen, vol. 18, 1893, p. 255, pi. 4, fig. 31.— Goes, Kongl. Svensk. 

 Vet. Akad. Handl., vol. 25, no. 9, 1894, p. 19, pi. 4, figs. 67, 68.— 

 Schlumberger, Mem. Soc. Zool. France, vol. 7, 1894, p. 254. — Goes, 

 Bull. Mus. Comp. Zool., vol. 29, 1896, p. 21.— Kiaer, Norske 

 Nordhavs. Exped., no. 25, 1899, p. 4.— Flint, Rep. U. S. Nat. Mus., 

 1897 (1899), p. 271, pi. 12, fig. 2.— Rhumbler, Arch. Prot., vol. 3, 

 1903, p. 264, fig. 108 (in text).— Cushman, Bull. 71, U. S. Nat. 

 Mus., pt. 1, 1910, p. 24, figs. 8-10 (in text). — Awerinzew, Mem. 

 Acad. Imp. Sci. St. Petersburg, sen 8, vol. 29, no. 3, 1911, p. 10. — 



