86 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



Plate 23. 



Fig. 1. Discorbis obtusa (d'Orbigny). a, dorsal view; b, ventral view; c, pe- 

 ripheral view. X 65. 



2. Truncatulina americana, new species, a, dorsal view ; b, ventral view ; 



c, peripheral view. X 65. 



3. Truncatulina pygmea Hantken. a, dorsal view; b, ventral view; c, pe- 



ripheral view. X 65. 



Plate 24. 



Fig. 1. Truncatulina ungeriana (d'Orbigny.) X 65. 



2. Truncatulina cf. T. pygmea Hantken. X 33. 



3. Truncatulina wuellerstorfi (Schwager). X 50. 



4. Truncatulina culebrensis, new species. X 33. a, dorsal view ; b, pe- 



ripheral view. 



5. Siphonina reticulata (Czjzek). X 65. 



6. Pulvinulina sagra (d'Orbigny). X 65. a, dorsal view; b, ventral view. 



Plate 25. 



Fig. 1. Pulvinulina concentrica Parker and Jones. X 35. 



2. Pulvinulina, menardii (d'Orbigny). X 65. 



3. Pulvinulina menardii (d'Orbigny). X 65. 



4. Pulvinulina, species ? X 65. 



5. Nonionina depressula (Walker and Jacob). X 65. a, side view; b, 



apertural view. 



6. Nonionina scapha (Fichtel and Moll). X 65. a, side view; 5, aper- 



tural view. 



Plate 26. 



Fig. 1. Nonionina panamensis, new species. X 65. a, side view; b, apertural 

 view. 



2. Nonionina anomalina, new species. X 65. a, side view ; b, apertural 



view. 



3. Polystomella striato-punctata, (Fichtel and Moll). X 65. a, side view; 



b, apertural view. 



4. Polystomella striato-punctata (Fichtel and Moll). X 65. a, side view; 



b, apertural view. 



5. Polystomella sagra d'Orbigny. X 65. a, side view ; b, apertural view. 



Plate 27. 



Fig. 1. Polystomella macella (Fichtel and Moll). X 65. a, side view; b, aper 

 * tural view. 



2. Polystomella crispa (Linnaeus). X 35. a, side view; b, apertural view, 



3. Polystomella craticulata (Fichtel and Moll). X 50. a, side view; &, 



apertural view. 



4. Quinqueloculina seminulum (Linnaeus). X 65. a, rear view; b, aper- 



tural view. 



