TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 7 



Rare specimens of this distinctive form of Spirillina vivipara are 

 found in the shallow water around several of the islands and atolls. 



Specimens are characterized by their smaller-than-average size for 

 this genus, their nearly transparent wall, and their concavo-convex 

 shape with the end of the coil turned inward onto the concave side. 



Their relationship to the typical form of S. vivipara seems to be sub- 

 specific rather than varietal. 



Genus CONICOSPIRILLINA Cushman, 1927 



CONICOSPIBILLINA SEMIINVOLUTA Cushman 



Conicospirillina semi-involuta Cushman, 1933, Contr. Cushman Lab. Foram. Res., 

 vol. 9, p. 86, pi. 8, fig. 19.— Cushman, Todd, and Post, 1954, U.S. Geol. 

 Surv. Prof. Paper 260-H, p. 357, pi. 88, fig. 38. 



This rare and distinctively ornamented species has thus far been 

 recorded only from off Fiji and from inside the lagoon at Rongerik 

 Atoll in the Marshalls. 



Rare specimens were found at 269 fathoms, Albatross station H3875, 

 in the Paumotu Islands. 



CONICOSPIRILLINA sp. 



Conicospirillina sp. Cushman, Todd, and Post, 1954, U.S. Geol. Surv. Prof. 

 Paper 260-H, p. 357, pi. 88, fig. 39. 



Two single specimens, one each from 21 fathoms at Guam Anchorage 

 in the Ladrone [Marianas] Islands and from Albatross station H3807 

 (112 fathoms, entrance Avatoru Pass, Rahiroa Atoll, S. Y 2 mi.), are identi- 

 cal with this apparently undescribed species known from a short core 

 inside Bikini Atoll. It is a simple unornamented coil, with the flat- 

 tened whorls considerably overlapping on the dorsal side, resulting in a 

 flat-domed test, depressed in the center of the opposite side and very 

 thin along the periphery. 



Family DISCORBIDAE 



Genus PATELLINA Williamson, 1858 



PATELLINA ADVENA Cushman 



Plate 1, Figure 2 



Patellina advena Cushman, 1922, U.S. Geol. Surv. Prof. Paper 129-F, p. 135, 

 pi. 31, fig. 9; 1924, Carnegie Instit. Washington, Publ. 342, p. 32. — Cushman 

 and Heerick, 1945, Contr. Cushman Lab. Foram. Res., vol. 21, p. 67, 

 pi. 11, fig. 1. 



Patellina corrugata Williamson var. formosa Heron-Allen and Earland, 

 1932, Discovery Reps., vol. 4, p. 406, pi. 13, figs. 23-25. 



Although it is probably not true that the distinction between 

 Patellina advena and P. corrugata coincides with the distinction between 

 Pacific and Atlantic specimens, as was suggested by Cushman (1930, 

 p. 16), P. advena appears to be more characteristic of the Pacific than 

 does P. corrugata. Moreover, the only records of P. advena from the 



