72 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



Genus TROCHAMMINA Parker and Jones, 1860. 



Nautilus (])art) Montagu, Test. Biit., Fiippl., 1808, p. 81. 



Rotalina (part) Wili.iaaison, Rpc. Foiani. Great Britain, 1858, p. 50. 



(llobuievina (part) WILLIAM^■•oN, Rec. Foram. Great Britain, 1858, p. 56. 



Trochavimma (part) Parkkr and Jones, Quart. Journ. Geol. Soc, vol. Ifi, 18G0, 

 p. 304. — W. B. Cakpenter, Parker, and Jones, Intr. Foram., 1862, p. 141. — 

 H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 337. — Eimbr 

 and FicKERT, Zeitsehr. WiKs. Zool., vol. 65, 1899, p. 695. — Chapman, The 

 Foraminifera, 1902, p. 151 .— Cu.'^hman, Bull. 71, U. S. Nat. Miis., pt., 1910, 

 p. 120.— (Type, T. ivjlata (^'[ontagu). — Nantilvs w'/o/ws Montagu.) 



Lituola (part) Parker and Jones, Philos. Trans., vol.- 155, 1865, p. 407. 



llaplophnuimmm (pait) Siddall, Cat. 13ritish Rec. Foram., 1879, p. 4. — II. B. 

 Brady, Rep. Voy. Clwllnigcr, Zoology, vol. 9, 1884, p. 312. — Chapman, The 

 Foraminifera, 1902, p. 138. 



Ammoglohigerina Eimer and I'lt kert, Zeitsehr. \\'is8. Zool., \o\. 65, 1899, p. 704. 



Dfiscription. — Test free or sometimes adherent, spiral, trochoid, 

 chambered; all chambers visible when viewed from above, only the 

 chambers of the last formed volution visible from below; wall 

 arenaceous usually with considerable cement; aperture an arched 

 slit on the ventral side of the chamber at its contact with the pre- 

 ceding volution. 



As here considered, Trocliamniina is restricted to those species 

 like T. infata or T. squamata, which have a true spiral, trochoid test 

 with all the chambers visible only from above. 



TROCHAMMINA SQUAMATA Jones and Parker. 



Trochammina squamata Jones and Parker, Quart. Journ. Geol. Soc, vol. 16, 1860, 

 p. 304. — W. B. Carpenter, Parker, and Jones, Intr. Foram., 1862, p. 141, 

 pi. 11, fig. 1.— Parker and Jones, Philos. Trans., 1865, p. 407, pi. 15, figs. 30, 

 31o-c.— H. B. Brady, Ann. Mag, Nat. Hist., eer. 4, vol. 6, 1870, p. 288, pi. 11, 

 fig. 4; Quart. Journ. Micr. Soc., vol. 19, 1879, p. 56. — Haeusler, Neues 

 Jahrb., 1883, pt. 1, p. 60, pi. 4, fig. 8.— H. B. Brady, Rep. Voy. Challenger, 

 Zoology, vol. 9, 1884, p. 337, pi. 41, figs. 3o-f. — Haeusler, [?] Neuea Jahrb., 

 Beil., vol. 4, 1885, p. 29, pi. 3, fig. 30.— Balkwill and Wright, Trans. Roy, 

 Irish Acad., p. 65, pi. 10, figs. 27-29, 40.— Haeusler, Abh. Schweiz. Pal. 

 Ges., vol. 17, 1890, vol. 28, 1885, p. 331.— J. Wright, Proc. Roy. Irish Acad., 

 ser. 3, vol. 1, 1891, p. 469.— Egger, Abh. Bay. Akad. Wiss. Munchen, vol. 18, 

 1893, p. 264, pi. 5, figs. 4-6. — Eimer and Fickert, Zeitsehr. Wiss. Zool., vol. 

 65, 1899, p. 695, fig. 43 (in text).— Millett, Journ. Roy. Micr. Soc, 1899, 

 p. 362.— Sidebottom, Mem. and Proc. Manchester Lit. and Philos. Soc, vol. 

 49, No. 5, 1905, p. 5. — Earland, Journ. Queckett Micr. Club, ser. 2, vol. 9, 

 1905, p. 202. — Heron-Allen and Earland, Journ. Roy. Micr. Soc, 1909, 

 p. 325.— Cushman, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 120, fig. 187a-6.— 

 Heron-Allen and Earland, Proc Roy. Irish Acad., vol. 31, pt. 64, 1913, 

 p. 50, pi. 3, figs. 7-10; Trans. Zool. Soc London, vol. 20, 1915, p. 619; Trans. 

 Linn. Soc. London, vol. 11, pt. 13, 1916, p. 228.— Cushman, Proc. U. S. Nat. 

 Mus., vol. 56, 1919, p. 600 (?). 



Trochammina proieus Karrer (paH), Sitz. Akad. Wiss. Wien., vol. 52, 1865, p. 494, 

 pi. 1, fig. 6 (not 1-5, 7, 8). 



Bescnption. — Test trochoid, low spired, composed of three or fom* 

 volutions with five or more chambers in each whorl; chambers all 



