PLATE XVIII. 



PAGE 



Fig. 31. TYPHIS ANTIQUUS. Magnified. 82 



Fig. 32. Fusus MARTINEZ. Natural size. 82 



Fig. 33. F. MATHKWSONII. Natural size. 83 



Fig. 34. F. AVERILLII. Magnified. 83 



Fig. 35. F. DIABOLI. Magnified. 84 



Fig. 3d. F. (Hemifusus) KEMONDII. Natural size. 87 

 Magnified view of surface. 



Fig. ST. NEPTUNEA CURVIROSTRIS. Magnified. 88 



Fig. 3&_ N. PONDEROSA. Natural size. 88 



Fig. 39. N. PERFORATA. Magnified. 81 



Fig. 4O. N. SUPRAPLICATA. Magnified. 89 



Fig, 41. N. HOFFMANNII. Natural size. 90 



Fig. 42. N. GRACILIS. Magnified. 90 



Fig. 43. PERISSOLAX BREVIROSTRIS. Natural size. 90 



Fig. 44. TRITONIUM DIEGOENSIS. Magnified. 95 



Fig. 40. TURRIS CLAYTONENSIS. Magnified. 92 



Fig. 47. T. (DRILLIA) VARICOSTATA. Magnified. 93 



Fig. 48. PUGNELLUS HAMULUS. Young. Natural size. 124 



Fig. 49. NASSA CRETACEA. Magnified. 97 



Fig. 50. N. ANTIQUATA. Magnified. 97 



Fig. 51. HAYDENIA IMPRKSSA. Natural size. 98 



. Top view. 



Fig. 52. PSEUUOLIVA LINEATA. Natural size. 99 



Fig. 53. OLIVELLA MATHEWSONII. Magnified. 100 



Fig. 54. ANCILLARIA KLONGATA. Magnified. 100 



Fig. 55. ? FASCIOLARIA L^VIUSCVLA. Natural size. 100 



