Figure 283.—Bonito hook shanks and points:

a, front view; length, 103 mm; greatest width, 15 mm.; tail width, 8 mm.; the inner surface (1) of the shell forms the front part and carries the point at the tail end. The front of the head end is ground at an equal slant inwards from the sides (2) to meet in a median longitudinal edge (3) making the head triangular in cross section. The two sides and back narrow to a point (4). The sides are grooved (5) near the tail end to take the end lashing (fausanga i'u). b, Side view; maximum thickness of head, 15 mm.; thickness of tail end, 5 mm.; hole (6) drilled transversely through head 20 mm. from the point (4) and about 4 mm. below the median edge. The raised part of the head with the median edge is called isu (nose) in Tutuila. The sides of the tail end are vertical or slightly convex. The back is convex longitudinally following the outer curve of the shell but owing to the narrow width is flat transversely. The tail portion is concave longitudinally in front. c, The point straight base, 20 mm. long; two holes for lashing; slant edge on right; depth of base part, 6 mm.; point diverges out being 26 mm. from front of shank. The point element carries the base (1), the bend (2) and the actual point (3). d, Point portion; straight base, 30 mm. long; curved right edge to base; depth above right hole, 7 mm.; sharp angle at bend (2); point diverges out being 26 mm., from front of shank; e, point portion; base 26 mm. long but curved on left; depth of base, 7 mm., with vertical right edge point parallel with base line and 20 mm., from front of shank.