Smithsonian Contributions to Knowledge

8f Gray Acanthocottus achenia air-vessels Algae Algse anal anal fin apex apice articulated base belong Benth bones branches calyx caudal fin caulibus cc cc cells character coast colour corolla Cotti Cottoids Cottus depth diameter dorsal fin feet filaments filiform flowers foliis fresh water frond fructification fruit fy Gray G gobio G viscosus genera genus gracilis Gregg half an inch head inches long involucre lamina lateral line latter leaves length Limpia lines long lobes margin membrane Mexico midrib minute nearly needle Nutt oblongis observed obtuse palatine bones pappo pappus Paso pectoral fins pectorals peduncle petioles pinnae PL Fendl PL Lindh plant Plate posterior preopercular Prodr ramuli rays receptacles rheostat Sagittarii San Pedro River Sargassum second dorsal shores slender snout species specimens spine spores squamis stem stipe surface Torr Triglopsis upper vegetable ventrals vertebrae