222 ALLANT HANCOCK PACIFIC EXPEDITIONS VOL. 6 



often in longitudinal rows ; aperture in the adult terminal, oval or ellipti- 

 cal, with a marginal lip and a tubular internal structure connecting the 

 aperture with the opening into the previous chamber. Length 0.65-1.10 

 mm. ; breadth 0.25-0.30 mm. ; thickness 0.10 mm. 



Holotype (AHF no. 47) from Station 2070. 



This species differs from L. mayori (Cushman) in the much com- 

 pressed adult portion, the keeled and spinose adult chambers, and the 

 more conical early stage. 



There is a great amount of variation in this species as will be seen by 

 our figures, the microspheric form often having the spinose and com- 

 pressed chambers at the very end, while the megalospheric form has them 

 reaching nearly to the base. From the localities this seems to have a rather 

 restricted distribution. 



Stations: 56, 76, 82, 144, 215, 226, 227, 540, 1010, 1078, 2070. 



Type locality. — Off Guadalupe Island, latitude 29° 8'; longitude 

 115° 10', in 250 fms. 



Distribution. — Off San Nicolas and Catalina islands in 147 fms.; off 

 Guadalupe Island in 12 to 250 fms.; off Gorgona Island, Ecuador, in 20 

 fms. 



Loxostoma limbatum (H. B. Brady) 

 Plate 28, Fig. 8 



Bolivina limhata H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 

 1881, p. 27; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 419, pi. 52, 

 figs. 26-28; Quart. Journ. Geol. Soc, vol. 44, 1888, p. 8 (table).— How- 

 chin, Trans. Proc. Roy. Soc. So. Australia, vol. 12, 1889, p. 8. — Chap- 

 man, Proc. Zool. Soc. London, 1895, p. 23. — Millett, Journ. Roy. Micr. 

 Soc, 1900, p. 543. — Chapman, Journ. Linn. Soc. Zool., vol. 28, 1900- 

 1902, pp. 187, 382.— Sidebottom, Mem. Proc. Manchester Lit. Philos. 

 Soc, vol. 48, pt. 2, 1904, p. 15; l.c, vol. 49, no. 5, 1905, p. 15.— Dakin, 

 Rep't Ceylon Pearl Oyster Fish., vol. 5, 1906, p. 234. — Chapman, Journ. 

 Linn. Soc. Zool., vol. 30, 1907, p. 32, pi. 4, fig. 83.— Bagg, Proc. U.S. 

 Nat. Mus., vol. 34, 1908, p. 138.— Sidebottom, Mem. Proc. Manchester 

 Lit. Philos. Soc, vol. 54, pt. 3, 1910, p. 13. — Chapman, Journ. Linn. Soc. 

 Zool., vol. 30, 1910, p. 404; Proc Roy. Soc. Victoria, vol. 22, 1910, 

 p. 275.— Cushman, Bull. 71, U.S. Nat. Mus., pt. 2, 1911, p. 47, text fig. 

 78; Publ. 291, Carnegie Instit. Washington, 1919, p. 33; Bull. 100, U.S. 

 Nat. Mus., vol. 4, 1921, p. 135, pi. 19, fig. 5.— Heron-Allen and Ear- 

 land, British Antarctic Exped., Zoology, vol. 6, 1922, p. 137. — Cushman, 



