9^9 • On the 
Concavas, near 
Costa Rica. 
November 22, 
Hacienda Las 
Cart ago , 
1940. 
970. C. H. Lankester and the 
lagoon on Hacienda Las Concavas, 
near Cartago, Costa Rica. 
November 22 , 1940. 
971. The lagoon at Hacienda 
Las Concavas near Cartago, Costa 
Rica. Volcan Irazu in background. 
November 22, 1940. 
