EXPLANATION OF PLATE 2 (II) 



Figs. 1, 2, X 40; Fig. 3, X 30; Fig. 4, X 35; Fig. 5, X 25; Fig. 6, X40; Figs. 7, 8, X 25; Fig. 9, X 45; 

 Figs. 10, 11, X 50; Fig. 13, X 30; Fig. 14, X 20; Fig. 12, X 30; Figs. 15, 17, X 40; Fig. 16, X 35. 

 Figures 1-3. — Nummoloculina contraria (d'Orbigny), juv. 



Challenger Sta. 120, off Pernambuco, Atlantic. (675 fathoms) 

 Referred by Brady to Planispirina sigmoidea and by Schlumberger (Bull. Soc. Zool. France, Vol. 12, 1887, 

 p. 118) to Sigmoilina as genotype. Wiesner (Die Miliolid. ostlich. Adria, Prague, 1923, p. 118) states that 

 sigmoidea is the young stage of Nummoloculina contraria (d'Orbigny). If correct, then Sigmoilina Schlumberger 

 becomes a synonym of Nummoloculina Steinmann 1881, and a new generic name is required for most species 

 now placed in Sigmoilina. 

 Figure 4. — Pyrgoella sphaera (d'Orbigny). 



Challenger Sta. 246, North Pacific. (2050 fathoms) 

 Referred by Brady to Biloculina and by Wiesner (1931) to Miliolinella. Cushman and White (C.C.L.F.R., 

 Vol. 12, No. 4, 1936, p. 90) erected the genus Pyrgoella with sphaera as genotype. 

 Figures 5, 6. — Pyrgo lucernula (Schwager). 



Fig. 5. Challenger Sta. 76, off the Azores, Atlantic. (900 fathoms) 

 Fig. 6. Porcupine Sta. 36, off Ireland, Atlantic. (725 fathoms) 

 Referred by Brady to Biloculina and by Cushman (Bernice P. Bishop Mus., Bull. 119, 1934, p. 108) to Pyrgo. 

 Figure 7. — Pyrgo fornasinii Chapman and Parr. 



Challenger Sta. 24, West Indies. (390 fathoms) 

 Referred by Brady to Biloculina ringens (Lamarck). Schlumberger (M4m. Soc. Zool. France, Vol. 4, 1891, 

 p. 557) referred this to B. bradyi Schlumberger, and also included B. ringens Brady (part) non Lamarck in 

 the synonym of B. sarsi (1. c. supra, 1891, p. 553). Cushman (U.S.N. M., Bull. 100, Vol. 4, 1921, p. 471) re- 

 ferred this figure to B. sarsi, ignoring Schlumberger's reference of the same figure to B. bradyi. Chapman 

 and Parr (Jour. Roy. Soc. W. Australia, 1935, Vol. 21, p. 5) pointed out that the name bradyi had been used by 

 Fornasini in 1886 for a different form and proposed the name Pyrgo fornasinii. Pyrgo sarsi (Schlumberger) 

 appears to be different from Brady's figures. 

 Figure 8. — Pyrgo vesper tilio (Schlumberger). 



Challenger Sta. 78, North Atlantic. (1000 fathoms) 

 Referred by Brady to Biloculina ringens (Lamarck) and by Schlumberger (Mem. Soc. Zool. France, Vol. 4, 

 1891, p. 561) to B. vespertilio. Transferred to Pyrgo by Thalmann (Eclog. geol. Helv., Vol. 25, No. 2, 1932, 

 p. 295). 

 Figure 9. — Pyrgo elongata (d'Orbigny). 



Challenger Sta. 24, West Indies. (690 fathoms) 

 Referred by Brady to Biloculina and by Cushman (U.S.N. M., Bull. 104, Pt. 6, 1929, p. 70) to Pyrgo. 

 Figures 10, 11, 15. — Pyrgo murrhyna (Schwager). 



Fig. 10. Challenger Sta. 224, North Pacific. (1850 fathoms) 

 Figs. 11, 15. Challenger Sta. 323, South Atlantic. (1900 fathoms) 

 Referred by Brady to Biloculina depressa var. murrhyna (figs. 10, 11) and to Biloculina depressa d'Orbigny 

 (fig. 15). Referred to Pyrgo murrhyna (Schwager) by Cushman (U.S.N. M., Bull. 104, Pt. 6, 1929, p. 71). 

 Schlumberger (1. c. supra, 1891, p. 550) notes that fig. 15 is close to murrhyna but may be a different species. 

 Figures 12, 16, 17. — Pyrgo depressa (d'Orbigny). 



Fig. 12. Challenger Sta. 352A, off Cape Verde Islands, Atlantic. (11 fathoms) 

 Fig. 16. Porcupine Sta. 23, off N.W. Ireland, Atlantic. (630 fathoms) 

 Referred by Brady to Biloculina and by Cushman (1. c. supra, 1929, p. 71) to Pyrgo. 

 Figures 13, 14. — Pyrgo laevis Defrance. 



Fig. 13. Porcupine Sta. 28, off N.W. Ireland, Atlantic. (1215 fathoms) 

 Fig. 14. Challenger Sta. 24, West Indies. (390 fathoms) 

 Referred by Brady to Biloculina. This is the genotype of Pyrgo Defrance. 



