. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HVDROTHERMAL VENT EGG CAPSULES table II .IvcniKc dimensions (mean ± standard deviation) i>l hydrothermal vei gastropod egg capsules collected on specific dives o/ AST ". ilvin" Number oj specimens collected on each dive are in parentheses Galapagos Rift Lenlicular Egg Capsules Length "Alvin" Dive # (mm) Width (mm) Height (mm) 1528(2) ± 1529(1) 1531 (4) ± 2031 (22) ± 1 ± ± ± Galapagos Rift Inflated-Triangular Egg Capsules Length "Alvin&qu
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HVDROTHERMAL VENT EGG CAPSULES table II .IvcniKc dimensions (mean ± standard deviation) i>l hydrothermal vei gastropod egg capsules collected on specific dives o/ AST ". ilvin" Number oj specimens collected on each dive are in parentheses Galapagos Rift Lenlicular Egg Capsules Length "Alvin" Dive # (mm) Width (mm) Height (mm) 1528(2) ± 1529(1) 1531 (4) ± 2031 (22) ± 1 ± ± ± Galapagos Rift Inflated-Triangular Egg Capsules Length "Alvin" Dive # (mm) Width (mm) Height (mm) 1523(1) 1527(1) 1528(1) Juan de Fuca Ridge Egg Capsules Length "Alvin" Dive # (mm) Width (mm) Height (mm) 1418(8) 3. 3 ± 1419(48) + ± ± ± ± Values for the maximum dimension of the protoconch and the number of volutions of the larval shell were mea- sured directly from scanning electron micrographs by the methods of Shuto (1974). Maximum diameter of the pro- toconch was denned as the straight-line distance from the protoconch-teleoconch boundary to the opposite side of the protoconch in the region of greatest width. Maximum diameter of the Protoconch I was denned as (1) the greatest. Figures 1-2. Lenticular egg capsules from Rose Garden Vent on the Galapagos Rift. Figure 1. Photograph of egg capsules attached to location marker retrieved on "Alvin" Dive 2031. Scale bar = 50 mm. Figure 2. Light micrograph of apical view of egg capsule removed from substrate. Arrow marks the escape aperture. Scale bar = 5 mm. bm, basal mem- brane. straight-line distance from the Protoconch I-Protoconch II boundary in species with planktotrophic development, or (2) from the Protoconch I-teleoconch boundary in non- planktotrophic species lacking a Protoconch II, to the op- posite side of the Protoconch I in the region of greatest width [see Lima and Lutz (1
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
