MILIOLININAE 311 



Sub-family MILIOLININAE 

 Genus Biloculina, d'Orbigny, 1826 



2. Biloculina depressa, d'Orbigny. 



Biloculina depressa, d'Orbigny, 1826, TMC, p. 298, No. 7, Modele no. 91. 

 Biloculina ringens var. carinata, Williamson, 1858, RFGB, p. 79, pi. vii, figs. 172-4. 



Nine stations: 230, 236; WS 83, 91, 108, 245, 408, 431, 433. 



Typical everywhere, but uncommon excepting at WS408, where it is abundant 

 and well developed. 



3 . Biloculina murrhyna, Schwager. 



Biloculina murrhyna, Schwager, 1866, FKN, p. 203, pi. iv, figs. 15 a, b. 



Biloculina murrhyna, Cushman, 1910, etc., FNP, 1917, p. 75, pi. xxviii, fig. 3; pi. xxix, fig. i. 



Seven stations: 228, 235, 236; WS 83, 215, 217, 408. 



Generally rare, but abundant at WS 408, where a complete range, from the megalo- 

 and microspheric young to large individuals, was found. Very large specimens at 

 WS 217. At some station it is very small and poorly developed. 



4. Biloculina serrata, Bailey. 



Biloculina serrata, Bailey, 1861, Boston Journ. Nat. Hist, vu (3), p. 3:50, pi. viii, E. 

 Biloculina depressa var. serrata, Brady, 1884, PC, p. 146, pi. iii, fig. 3. 

 Biloculina serrata, Cushman, 1910, etc., FNP, 1917, p. 7^, pi. xxix, fig. 2. 



Three stations: 22S ; WS 217, 408. 



Good single specimens at each station. At 228 and WS 408, the serration is confined 

 to the aboral half of the shell. 



5. Biloculina sarsi, Schlumberger. 



Biloculina ringens, Brady, 1884, FC, p. 139. 



Biloculina sarsi, Schlumberger, 1S91, BGF, p. 553 (in the reprints, p. 166), text-figs. 10-12, 



pi. ix, figs. 55-9. 



One station: WS 221. 



Occurs at this station, large and typical. 



6. Biloculina elongata, d'Orbigny. 



Biloculina elongata, d'Orbigny, 1826, TMC, p. 298, no. 4. 



Biloculina elongata, Schlumberger, 1891, BGF, p. 571, figs. 35, 36, pis. xi and xii, figs. 87-9. 



Twelve stations: 388; WS 71, 84, 86, 87, 88, 92, 93, 97, 109, 221, 246. 



Generally distributed and very common. 



7. Biloculina patagonica, d'Orbigny (Plate VI, figs. 4-6). 



Biloculina patagonica, d'Orbigny, 1839, FAM, p. 65, pi. iii, figs. 15-17. 



Biloculina ringens var. patagonica, Williamson, 1858, RFGB, p. 80, pi. vii, figs. 175, 176. 



Eight stations: 388; WS 84, 86, 87, 88, 91, 97, 221. 



