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A new branchiobdellid (Annelida) from Costa Rica
Vol 12, Page 1
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The river crabs of Costa Rica, and the sub-families of the Pseudothelphusidae
Vol 12, Page 5
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Mysidopsis almyra, a new estuarine mysid crustacean from Louisiana and Florida
Vol 12, Page 15
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Digenetic trematodes of marine fishes from Apalachee Bay, Gulf of Mexico
Vol 12, Page 39
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Etheostorna ditrema, a new darter of the subgenus Oligocephalus (Percidae) from springs of the Alabama River basin in Alabama and Georgia
Vol 12, Page 65
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A new subspecies of the Crawfish Orconectes leptogonopodus from the Ouachita River drainage in Arkansas
Vol 12, Page 87
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Etheostoma (Oligocephalus) nachale, a new darter from a limestone spring in Alabama
Vol 12, Page 101