PATAGONIAN EXPEDITIONS: ZOOLOGY. 



EXPLANATION OF PLATE XXXVII. 



Fig. I. Percichthys altipennis (Regan). After Regan. 



Fig. 2. Percichthys trucha C. & V. 



Fig. 3. Percichthys vincignerr.e (Perugia). 



Fig. 4. Menidia hatcheri Eigenmann. 



(vol. hi) 



