I30 DISCOVERY REPORTS 



328. Rotalia soldanii, d'Orbigny (F 394 a). 



Four stations: WS 429, 521, 522, 523. 



Many large and typical specimens at WS 521 and 522, pauperate or young only at the 

 other stations. 



Family NUMMULINIDAE 



Sub-family NONIONINAE 



Genus Nonion, Montfort, 1808 



329. Nonion depressulum (Walker and Jacob) (F 399). 



Forty-five stations: 13, 16, 20, 23, 27, 30, 31, 42, 45, 123, 126, 131, 140, 144, 148, 149, 157, 660; 

 WS 20, 25, 27, 28, 33, 37, 40, 42, 43, 45, 46, 47, 48, 50, 52, 63, 63-4, 66, 113, 154, 314, 349, 357, 

 418, 522; Drygalski Fjord; MS 68. 



Generally distributed, very common at WS 50, common at Sts. 20, 45, 144, 149 and 

 MS 68, varying from frequent to rare elsewhere. The best series at Sts. 45, 149 and 

 MS 68. 



The specimens are not in agreement with the British type but do not present sufficient 

 difference to warrant specific separation. The type from South Georgia is somewhat 

 inflated with flush thick sutures and an unbroken peripheral edge. The umbilicus well 

 marked owing to the coalescence of the ends of the sutural lines, but not so pronounced 

 as in the figure which Brady gives of A^. asterizans (B. 1884, FC, pi. cix, figs, i, 2). 



330. Nonion asterizans (Fichtel and Moll) (F 400). 

 Three stations: 136; WS 79, 255. 



Very rare and pauperate. 



331. Nonion orbiculare (Brady). 



Nomonina orbicularis, Brady, 1881, HNPE, p. 105, pi. ii, fig. 5 a, h; 1884, FC, p. 727, pi. cix, 



figs. 20, 21. 



Nonion orbiculare, Cushman, 1918, etc., FAO, 1930, p. 12, pi. v, figs. 1-3. 



Two stations: 131 ; WS 37. 



A few rather doubtful specimens, which are nearer to Brady's species than any other 

 with which I am acquainted. 



332. Nonion umbilicatulum (Walker and Jacob) (F 401). 



Twenty stations: 13, 16, 45, 123, 131, 136, 140, 143, 144, 149; WS 33, 42, 63-4, 113, 349, 351, 

 418, 429, 521, 522. 



Always rare except at WS 429, where it is frequent and typical. Good specimens also 

 at Sts. 16, 123, WS 113, 521 and 522, but elsewhere always weak and far from typical. 



333. Nonion pompilioides (Fichtel and Moll) (F 402). 

 Three stations : 660 ; WS 63-4, 349. 



Very rare, only one or two specimens at each station. 



