PERCH 
29 
Fig. 3. Carass perch ( Rudabborre , Perea fluviatilis, var. gihba ) from Lake Elgsjo in Ostergotland, 1 / 2 of the natural size. 
Fig. 4. Skeleton of the Carass Perch externally figured above. 
Fig. 5. 
Spotted Perch (Skalling, Perea fluviatilis, var. maculata ) from Lake Tisaren in Nerike, 2 / 3 of the natural size. 
