400 EXPLANATION OF PLATES. 
FIGURE. PAGE, 
PLATE 44. 
16. Purpura Persica, Linn. Phillippines, . . 109 
17. Purpura (Purpurella) columellaris, Lam. Panama, . 110 
18. Purpura (Tribulus) planospira, Lam. Galapagos Is., eoaghal 
19. Purpura (Thalessa) hippocastaneum, Lam. Philippines, 1f4 
20. Purpura (Stramonita) Floridana, Conrad. Florida, . 11] 
21. Purpura (Trochia) cingulata, Linn. Cape of Good Hope, 111 
22. Purpura (Polytropa) lapillus, Linn. N. England,Europe, 111 
23. Purpura (Cronia), amygdala, Kiener. Australia, . - Li 
24. Purpuroidea nodulata, Lycett. Oolite, England, . . 112 
25, 26. Lysis duplicosta, Gabb. Cretaceous, California, . 112 
27. Vexilla vexillum, Chemn. Philippines, ; d + 112 
28, 29. Ricinula horrida, Lam. Philippines, . ‘ . 118 
30. Ricinula (Sistrum) morus, Lam. Polynesia, d 2 1918 
31. Pinaxia coronata, A. Ad. Polynesia, . : . 114 
32. Cuma kiosquiformis, Duclos. Panama, ; ‘ » HS 
33, 34. Rhizochilus antipathicus. Polynesia, . ‘ y lai 
35. Rhizochilus (Galeropsis) madreporarum, Sowb. Poly- 
nesia, . : ; 5 : e~ Ldst 
36. Separatista Chemnitzii, Ay Ad. Philippines, ; . 118 
37, 38. Magilina serpuliformis, Vélain. Indian Ocean, . 120 
39. Nisea simplex, Serres. Lower Crag, Nimes, ; - 121 
PLATE 45. 
40. Lopas sertum, Brug. Polynesia, . i ‘ . 112 
41. Monoceras giganteum, Lesson. Chili, . ; ‘ , HS 
42. Monoceras lugubre, Sowb. Lower California, — . . Ls 
43. Pseudoliva plumbea, Chemn. Africa, . ; ; . iis 
44, Chorus Belcheri, Hinds. California, . ; ¢ . 114 
45. Concholepas Peruviana, Lam. Peru, . ; ; . Ld 
46. Rapana bezoar, Linn. Japan, : . Ls 
47. Rapana (Eephora) quadricostata, Say. "Miocene, ~Ma., 116 
48. Rapana (Latiaxis) Mawee, Gray. Philippines, . 116 
49. Rhizochilus (Coralliophila) neritoidea. Polynesia, : ly 
50. Melapium lineatum, Lam. East Indies, : , . 118 
51. Rapa papyracea, Lam. China, . , ’ ‘ . LI8 
52, 53. Magilus antiquus, Lam. Red Sea, . , > bE 
PLATE 46. 
54. Triton variegatus, Lam. Philippines, . SwelntGun: el 
55. Triton (Simpulum) chlorostomus, Lam, West Indies, 128 
56. Triton (Cymatium) tigrinus, Brod. W. Coast. of Centr. | - 
America, ~ . . 128 
57. Triton (Guttornium) cy nocephalus, ‘Lam, West Indies, 123 
58. Triton (Epidromus) distortus, Schub. et Wagn. Polyn.. 123 
59. Triton (Priene) scaber,. King... Chilly... ¢¢ gonay gu. 128 
