102 BULLETIN 104^ UNITED STATES NATIONAL MUSEUM. 



Description. — Test free, consisting of a proloculum and long, 

 undivided second chamber, coiled in an elongate, close spiral, wall 

 composed of sand grains and much cement, smooth; aperture, the 

 open end of the tubular chamber. 



Recognizing the considerable differences between these and the 

 other species included under Ammodiscus, Rhumbler proposed 

 Tumtellella for the species following. It seems very distinctive and 

 may include T. spedahilis (H. B. Brady). 



TURRITELLELLA SHONEANA (Siddall). 



Plate 38, figs. 5-7. 



Trochammina shoneana Siddall, Proc. Chester Soc. Nat. Sci., pt. 2, 1878, p. 46, 

 figs. 1, 2. 



Ammodiscus shoneaniis Siddall, Cat. Brit. For., 1879, p. 5. — Balkwill and 

 Wright, Proc. Roy. Irish Acad., vol. 3, 1882, p. 546; Journ. Micr., vol. 3, 

 1884, p. 25, pi. 1, fig. 4. — H. B. Brady, Pvep. Voy. Challenger, Zoology, 

 vol. 9, 1884, p. 335, pi. 38, figs. 17-19. — Heron-Allen and Earland, 

 Proc. Roy. Irish Acad., vol. 31, No. 64, 1913, p. 49, pi. 3, fig. 6; Trans. Linn. 

 Soc. London, vol. 11, pt. 13, 1916, p. 227. 



Turritellopsis shoneanus Rhumbler, Nachr. Ges. Wiss. Gottingen, 1895, p. 84; 

 Zeitschr. allg. Phys., vol. 2, 1902, p. 284, fig. 103. 



Tiirntella shoneana Rhumbler, Arch. Prot., vol. 3, 1903, p. 283, fig. 135 (in 

 text).— CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 79, figs. 107-109 

 (in text). 



Description. — ^Test free, composed of a proloculum and a long 

 undivided tubular second chamber, in a close coiled, elongate spiral, 

 of nearly uniform diameter, waU finely arenaceous, with much 

 cement, rounded open end of the tubular chamber serving as the 

 aperture, color reddish brown. 



Length, 0.25-0.5 mm. 



Distrihuiion. — In the North Sea and about the British Isles this 

 species has been recorded a number of times in comparatively shallow 

 water. Rhumbler records it from comparatively shallow water off 

 the Cape Verde Islands. The Challenger obtained it from compara- 

 tively shallow water off Kerguelen Island and again in very deep 

 water of the North Pacific, 3,950 fathoms. I have material kindly 

 sent me by Mr. Joseph Wright, of Belfast, Ireland, from Rockport, 

 Belfast Lough, between tides, but I have found no specimens in the 

 material I have examined from this side of the Atlantic. 



Heron-Allen and Earland mention the finding of the megalospheric 

 form only in the Clare Island region and the fact that the material 

 figured in part by Brady seems to be microspheric. 



TURRITELLELLA SPECTABILIS (H. B. Brady). 



Plate 38, figs. 1-4. 



Ammodiscus spcclabilis H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 51; 



Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 336, pi. 38, figs. 20-22. 

 Turritcllclla spectabilis Rhumbler, Arch. Prot., vol. 3, 1903, p. 283, fig. 134 



(in text). 



