76 



BULLETIN 11, UNITED STATES NATIONAL MUSEUM. 



*^%»asi# 



Type-specimen.— Cat. No. 8260, U.S.N.M., from Albatross D4979, 

 in 943 fathoms, off the south coast of Honshu Island, Japan. 



The specimen figured by Brady a 

 has a similar form, but less developed. 



Genus GORDIAMMINA 

 Rhumbler, 189S. 

 Trochammina (part) Jones and Parker, 



Quart. Journ. Geol. Soc, vol. 61, 



1860, p. 304. 

 Ammodiscus (part) Siddall and H. B. 



Brady, Cat. Brit. Rec. Foram., 1879, 



p. 5; Rep. Voy. Challenger, Zoology, 



vol. 9, 1884, p. 333. 

 Gordiammina Rhumbler, Nachr. kon. 



Ges. wiss. Gottingen, 1895, p. 84; 



Arch. Protistk., vol. 3, 1903, p. 281. 



Type, G. charoides (Jones and Par- 



ker)= Trochammina charoides Jones 



and Parker. 



Description. — Test composed of 

 a proloculum and long, undivided 

 second chamber, winding upon itself 

 in various planes, not completely 

 spiral throughout, wall finely arena- 

 ceous, with much cement, smooth 

 both without and within, color reddish or yellowish brown. 



Rhumbler has proposed a new generic name to include the two 

 species which have the coiled chamber winding in varying planes but 

 not in a regular spire. The method of growth is certainly very 

 different from the planospiral one of Ammodiscus, and the generic 

 name used by Rhumbler has been adopted here. 



GORDIAMMINA GORDIALIS (Jones and Parker). 



Trochammina squamata, var. gordialis Jones and Parker, Quart. Journ. Geol. 

 Soc, vol. 16, 1860, p. 304. — Parker and Jones, Trans. Roy. Soc. Lon- 

 don, vol. 155, 1865, p. 408, pi. 15, fig. 32. 



Trochammina gordialis W. B. Carpenter, Parker, and Jones, Intr. Study 

 Foram., 1862, p. 141, pi. 11, fig. 4. — Jones, Parker, and Kirkby, Ann. Mag. 

 Nat. Hist., ser. 4, vol. 4, 1869, p. 390, pi. 13, figs 7, 8.— Wright, Proc. Belfast 

 Field Club, 1876-77 (App.), pi. 4, fig. 3.— Haeusler, Ann. Mag. Nat Hist., 

 ser. 5, vol. 10, 1882, p. 55, pis. 3 and 4, figs. 8-20. 



Trochammina (Ammodiscus) gordialis Haeusler, Neues Jahrb., 18S3, p. 59, pi. 4, 

 figs. 2, 3. 



Ammodiscus gordialis Siddall and H. B. Brady, Cat. Brit. Rec. Foram., 1879, 

 p. 5. — Butschli, in Bronns Klassen und Ordnungen des Thierreichs, vol. 1, 

 1880, p. 196, pi. 5, fig. 22.— H.B.Brady, Denkschr. kais. Akad. Wiss.Wien, 

 vol.42, 1881, p. 100; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 333, pi. 38, 

 figs. 7-9. — Haeusler, Neues Jahrb., Beil., vol. 4, 1885, p. 24, pi. 3, figs. 



Fig. 97.— Ammodiscus exsertus. X 100. 



a, APERTURAL VIEW; b, FRONT VIEW. 



"Rep. Voy. Challenger, Zoology, vol. 9, 1884, pi. 38, fig. 4. 



