PILSBRY: NON-MARINE MOLLUSCA OF PATAGONIA. 609 



Near the Mount of Observation (below the mouth of Santa Cruz River). 

 This species is chiefly distinguished by its cardinal teeth, which differ 

 constantly from those of the other Patagonian Pisidia. 



FIG. 19. 



Pisidium observations. Interior oi right and left valves. 



Family MUTELIDA1. 

 Genus ANODONTITES Bruguiere. 



Anodontites Brug., Journ. d'Hist. Nat. Paris, I, 1792, p. 131 (for A. cris- 

 patus Brug.). 



Patularia Swainson, Malacology, 1840, pp. 287, 381 (for P. ovata Swains. 

 = trapesialis Lam. and P. rotundatus Swains. = ? Anodonta wood- 

 land Lea). 



Glabaris Gray, Proc. Zool. Soc. Lond., 1847, p. 197 (for Anodonta 

 exotica Lam.). 



Glabaris Simpson, Synopsis of the Naiades, p. 916. 



Patularia Dall, Nautilus, XX, 1906, p. 39 (type/*, ovata Swains, implied). 



ANODONTITES PUELCHANUS (d'Orbigny). 



Anodonta puekhana d'Orb., Mag. de Zool., 1835, p. 40 ; Voy. dans 1'Amer. 

 Merid., Moll., p. 620, pi. 79, figs. 7-9. Doering, Informe Oficial de la 

 Comision Cientificade la Expeditional Rio Negro (Patagonia), 1881, 

 Zoologia, p. 74. 



