. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. PAd. --BrM -Exs -BrM ' Ins FlG. 115.—Dorsal view of an adult mussel w ith valves open normally. Fig. i 16.—Dorsolateral view of an adult mussel from which shell has heen removed. FlG. 117.—Median view of a mussel with right valve, ri^ht mantle lobe, and gills rem<n ed, FlG. i iS.—Ventral interior view of a mussel with anterior and posterior muscles cut and valves laid open. Abbreviations.—An, anal muscle; ARet, anterior retractor muscle; lower BrM in. fig. 115, main portion of branchi
. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. PAd. --BrM -Exs -BrM ' Ins FlG. 115.—Dorsal view of an adult mussel w ith valves open normally. Fig. i 16.—Dorsolateral view of an adult mussel from which shell has heen removed. FlG. 117.—Median view of a mussel with right valve, ri^ht mantle lobe, and gills rem<n ed, FlG. i iS.—Ventral interior view of a mussel with anterior and posterior muscles cut and valves laid open. Abbreviations.—An, anal muscle; ARet, anterior retractor muscle; lower BrM in. fig. 115, main portion of branchial membrane, upper BrM in fig. 115 and BtM in fig. 116, extension of branchial membrane; ByR, hyssus root bearing threads; ByP, hyssus pit; ExS and Exs, exhalcnt syphon; Fm, fimbriie of mantle; Ft, foot; IBr, inner branchial fold; /LP, inner labial palp; InS. inhalent syphon; /,, liver; LP, labial palp; M, mantle; Mes, mesosoma; Mth, mouth; OBr, outer branchial lamella; OLP, outer labial palp; PAd, posterior adductor muscle; Pal, pallial muscles; PIC, plicate canals; PRet, posterior retractor muscle; 5, sucker; V(Jr, ventral Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States Fish Commission. Washington, The Commission, Govt. Print. Off
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