Keywords: nature animals amphibians frogs smithsonian probably public domain probablypublicdomain SI Neg. 91-14838. Date: na...Frog Centrolenella spinosa Family: Centrolenidae,glass frogs ..Credit: Carl C. Hansen (Smithsonian Institution) SI Neg. 91-14838. Date: na...Frog Centrolenella spinosa Family: Centrolenidae,glass frogs ..Credit: Carl C. Hansen (Smithsonian Institution) |