182 
LIST OF FIGURES. 
Vor. I. PAGE 
FIGURE 
27. Comparative size of steel and hemp dredging ropes (Sigsbee) . à 157 25 
28. Accumulator (Sigsbee) . . . 5 ‘ ‘ + . i vico 
29. Deck of “Blake,” showing winding reel, and winding engine, facing 
bow, dredging boom, ready for dredging (Sigsbee) i ‘ 30, 31 
29a. “Blake” deck looking aft, ready for dredging, reeling engine, drum, 
leading block (Sigsbee) . > . è š è i 2, 33 
30. Plan of deck of * Blake”? (Sigsbee) , a " . . i . 33 
31. Scoop net. ; i i 4 : i 4 È ‘ . . 35 
32. Tow net . y i a " è . . à ‘ ‘ i . 38d 
33. Sigsbee's gravitating trap (Sigsbee) . . ‘ ‘ ‘ ‘ a . 36 
III. Tue Froripa Reers. (Figs. 34-54.) 
34. Straits of Florida, from Coast Survey charts . , ‘ ` , e. 02 
35. Distant mangrove islands seen from Mangrove Beach north of slaughter 
house, Key West . + ; à + . , s . . 54 
36. Coral breccia i x asia 54 
37. Coral oölite  . à i , ‘ i ; i , i . . 54 
38. Map of the Tortugas, from Coast Survey charts — . . à , vi 08 
39. Barbados terraces . i à è : 4 i i . 65 
40. Sections across the Peninsula of Florida . e " v i 1 64, 65 
41. Sections across the Florida Reefs, as numbered on Fig. 34 — . 4 . 66 
42, Coral rock beach, north of Fort Taylor, exposed to the action of waves 
of channel between outer reef and Key West : " ‘ 68, 69 
43. Lagoon formed by promontories and low islands covered with mangroves, 
northeast shore of Key West Island . : t 70, 71 
44. Alacran Reef, Marquesas Keys, and sections across the reef and 
keys. i è , « " , 72, 73 
45. Pelagic Porites embryo, greatly magnified — . A . . A .. 74 
46. Terraces near Fort Charles Light House, Barbados . i . e si OD 
47. Madrepora prolifera (Agassiz) : ' ; 80, 81 
48. Porites clavaria (Agassiz) ‘ ‘ è " . + x a Oe 
49. Udotea flabellata (Agassiz) - n ; x ^ ‘ " i 82, 83 
50. Halimeda tridens (Agassiz) . . . à A " 82, 83 
51. Madrepora palniata (Agassiz) . 84, 85 
52, Rhipidigorgia flabellum (Agassiz) ‘ : ‘ : 5 , 86, 87 
53. Coral sand beach south'of Navy Depot, Key West . , . i 88, 89 
54. Orbicella annularis (Agassiz) . E ‘ i ‘ ‘ ‘ si, d» 
IV. TOPOGRAPHY or THE EASTERN COAST OF THE Norra AMERICAN CONTI- 
NENT. (Figs. 55-61.) 
55. Atlantic basin, along Eastern United States, from model constructed 
by the U. S. Coast Survey and Hydrographic Office . ‘ >. 004 
56. Contour map of the western part of the North Atlantic, U. S. Coast 
Survey and Hydrographic Office * . . . . 94, 95 
57. Contour map of the Caribbean Sea, prepared from data furnished by 
the U. S. Hydrographie Office, based on the deep-sea soundings 
of the U. S. C. S. S. “Blake” and the U. S. F. C. S. “ Alba- 
tross" . 5 i » > a à ; z ; 98, 99 
58. Contour map of the Windward Islands and the adjacent sea (U. S. 
(UN T : . . . 100 
Contour map of the Gulf of Mexico (U.S.C. $8) . ‘ H " «102 
