Life in rivers and brooks. - 10 prepared slides in box

59-5450 Life in rivers and brooks 59-5450/1 Fresh water diatoms, strewn slide with mixed species w.m. 59-5450/2 Mixed desmids, solitary and filamentous forms w.m. 59-5450/3 Fresh water sponge (Spongilla), siliceous spicules, isolated and w.m. 59-5450/4 Moss animals (Plumatella), section through colony 59-5450/5 May fly (Caenis), larva with gill lamellae, w.m. 59-5450/6 Trout (Salmo), t.s. through stomach showing glands 59-5450/7 Trout (Salmo), gills t.s. showing lamellae 59-5450/8 Frog (Rana), tongue, t.s. with papillae 59-5450/9 Frog (Rana), skin showing skin glands, vertical section 59-5450/10 Hornwort (Ceratophyllum), stem of an aquatic plant, t.s.