FORAMINIFERA OF THE ATLANTIC OCEAN. 89 



Ammodiscus and its allies Glomospira, Ammodiscoides, and Tur- 

 ritellella form a rather unijfied group in that they are all close coiled 

 and are of fine material, v>'ith an abundance of reddish cement. 

 All the tests seem to be free except in the genera Ammolagena and 

 GirvaneUa. In some of the species both microspheric and mega- 

 lospheric forms are known. 



Genus AMMOLAGENA Eimer and Fickert, 1899. 



Trochanimina Jones and Parker (part) (type Trochammina inegularis, var. 



clavata Parker and Jones), Quart. Journ. Geol. Soc, vol. 16, 1860, p. 304. — 



W. B.. Carpenter, Parker, and Jones, Introduction to the Study of the 



Foraminifera, 1862, p. 142. 

 Webbina H. B. Brady (part), Proc. Roy. Soc. Edinburgh, vol. 11, 1882, p. 711 



(not Webbina d'Ovhigny, 1839); Rep. Voy. Challenger, Zoology, vol. 9, 1884, 



p. 349. 

 Ammolagena Eimek and Fickert, Zeitschr. Wiss. Zool., vol. 65, 1899, p. 673. — 



CusHMAN, Bull. 71, U. S. Nat. Mua., pt. 1, 1910, p. 67. — Rhcmbler, Foram. 



Plankton Exped., Teil 2, 1913, pp. 346, 371.— Pearcey, Trans. Roy. Soc. 



Edinburgh, vol. 49, 1914, p. 1003. 

 Webbinella Rhumbler (part), Arch. Prot., vol. 3, 1903, pp. 228, 229. 



Description. — Test fii-mly attached, composed of an oval prolo- 

 culum flattened on the under side and a second tubular chamber of 

 variable length but of nearly uniform diameter, the open end serving 

 as the aperture; wall finely arenaceous, the cement in excess of the 

 sandy particles. 



There seems to be no question of the correctness of the use of 

 Ammolagena for this genus. Some authors still persist in the use of 

 Wehhina although its use for this species by Brady is not at all the 

 sense in which d'Orbigny used the name. 



AMMOLAGENA CLAVATA (Parker and Jones). 



Plate 34, figs. 2-5; plate 35, figs. 1-3. 



Trocliammina irregularis, var. clavala Parker and Jones, Quart. Journ. Geol. Soc, 

 vol. 16, 1860, p. 304. 



Trochammina irregularis (part) W. B. Carpenter, Parker, and Jones, Introd. 

 Foram., 1862, p. 142, pi. 11, fig. 6. 



Webbina clavata H. B. Brady, Proc. Roy. Soc. Edinburgh, vol. 11, 1882, p. 711; 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 349, pi. 41, figs. 12-16.— 

 H. B. Brady, Parker, and Jones, Trans. Zool. Soc, vol. 12, pt. 7, 1888, 

 p. 218, pi. 42, fig. 21.— J. Wright, Proc. Roy. Irish Acad., vol. 1, 1891, p. 470, 

 pi. 20, figs. 2, 3.— Goes, Kongl. Svensk. Vet. Akad. Ilandl., vol. 25, No. 9, 

 1894, p. 32, pi. 6, figs. 245, 246.— Chapman, Proc. Zool. Soc. London, 1895, 

 p. 18.— GiiES, Bull. Mus. Comp, Zool., vol. 29, 1896, p. 35.— Flint, Rep. 

 U. S. Nat. Mus., 1897 (1899j, p. 279, pi. 24, fig. 3.— Kiaer, Norske Nordhavs 

 Expedition, No. 25, 1899, p. 4.— Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 

 129. 

 20173—18 7 



