62 PROCEEDINGS OF THE jVATIOXAL MUSEUM. vol.49. 



Plate 30. 



Fig. 1. R. mazatlanica, new species, cotype, 6 mm., p. 43. 



2. R. excolpa, new species, type, 4.1 mm., p. 39. 



3. R. mazatlanica, new species, cotype, p. 43. 



4. R. kelscyi Dall and Bartsch type, 6.3 mm., p. 49. 



5. R. adamsi, new species, type, 6 mm., p. 47. 



6. R. lapazana, new species, type, 6 mm., p. 50. 



Plate 31. 



Fig. 1. R. signac, new name, type, 2.2 mm., p. 61. 



2. R. woodivardii Carpenter, back view, cotype, 3 mm., p. 57. 



3. R. zeltncri De Folin, type, 4.5 mm., p. 52. 



4. R. signac, new name, back of basal portion of last whorl, p. 61. 



5. R. woodwardii Carpenter, cotype, 3 mm., p. 57. 



6. R. inca D'Orbrigny, 8 mm., p. 42. 



7. R. laurae De Folin, type, 2 mm., p. 52. 



8. R. inca D'Orbigny, 8 mm., p. 42. 



Plate 32. 



Fig. 1. R. nereina, new species, type, 4.3 mm., p. 53. 



2. R. pleistocena, new species, type, 4.8 mm., p. 54. 



3. R. burragci, new species, type, 3.7 mm., p. 52. 



4. R.firmata C. B. Adams, type, 4.7 mm.=type of R. scalariformis, p. 38. 



5. R. clandestina C. B. Adams, type, 3 mm., p. 55. 



6. R.firmata C. B. Adams, type, 4.7 mm., p. 38. 



7. R. effusa Morch, type, 4.8 mm., p. 54. 



8. R.janus C. B. Adams, type, 4.5 mm., p. 60. 



Plate 33. 



Fig. 1. R. californica, new species, type, 2.8 mm., p. 55. 



2. R. dulli, new species, type, 2.8 mm., p. 59. 



3. R. cleo, new species, type, 2.8 mm., p. 58. 



4. R. bakeri Bartscb, type, 2.7 mm., p. 56. 



5. R. cerrocensis, new species, type, 2.4 mm., p. 59. 



6. R. mexicana, new species, type, 2.7 mm., p. 56. 



7. R. newcombei Dall, type, 3 mm., p. 58. 



8. R. coronadoensis, new species, type, 3.5 mm., p. 60. 



9. R. histia, new species, type, 2.8 mm., p. 51. 



