TEXTULARIIDAE 117 



Genus Bigenerina, d'Orbigny, 1826 



233. Bigenerina minutissima, Earland (SG 158) (Plate IV, fig, 48). 

 Six stations; 360, 362, 373 ; WS 199, 471, 472. 



Very rare everywhere. 



By an oversight the description and figures of this new species were included in the 

 South Georgia report (SG 158). The error was discovered too late for correction in the 

 proofs, and in the circumstances the description is repeated for convenience: 



"Test very minute, rod-shaped, consisting of a large proloculus followed by three to 

 four pairs of long narrow chambers increasing rapidly in size, but very little in width, 

 ending with three cyHndrical moniliform chambers and a terminal orifice. Sutures 

 depressed. Constructed of small sand grains, rather large for the size of the organism, 

 embedded in cement on a chitinous membrane. Colour pale brown. Length 0-35 mm., 

 width 0-04 mm. . . . The organism is so small that it might easily have been overlooked 

 at other stations. Its structure is not easily seen, unless the specimens are mounted in 

 balsam." 



The only stations at which the species has been found lie outside the South Georgia 

 area in the very deep water of the Scotia Sea, the depths lying between 2515 m. at 

 St. 373 and 3580 m. at WS 472. 



References to the two stations mentioned in the South Georgia report, viz. Sts. 

 WS 199, 472, have also crept into that report under Ammobaciilites aggliitinans (SG 116) 

 recorded as occurring at St. WS 472, Ammomarginulina ensis (SG 122) and Clavulina 

 communis (SG 165), both recorded from St. WS 199. These errors are of less import- 

 ance, as the three species concerned were found elsewhere in the South Georgia area. 



I am indebted to Mr M. E. Challen who drew my attention to the error (see Nature, 

 p. 562, April 14, 1934), for the information that this is a southern record for the genus 

 Bigenerina. This appears to be the case. 



As a result of the examination of additional specimens it may be added that the 

 textularian series may have as few as two pairs of chambers, and the moniliform series 

 up to six chambers. 



Sub-family VERNEUILININAE 

 Genus Verneuilina, d'Orbigny, 1840 



234. Verneuilina bradyi, Cushman (SG 160) (Plate V, figs. 17, 18). 



Nineteen stations: 360, 362, 369, 385-7; WS 204, 377, 403, 468, 469, 471, 474, 505, 506, 507B, 

 516. 517. 555- 



Frequent at Sts. 360, 362, 385 and 386, rare or very rare elsewhere. All the records 

 are in deep water, 1500-4773 m., except Sts. WS 506 and 507 b in the Bellingshausen 

 Sea, where the depths were 584-580 m. Several other deep-water species also occur in 

 comparatively shallow water in this sea. 



At many stations the species occurs together with a distinctive variety characterized 

 by a very low spire, the breadth sometimes exceeding the height. The shell wall is also 

 darker owing to the incorporation of dark mineral grains. It has been separated by 

 Wiesner as V. bradyi var. nitetis. 



