1927 P.28 Nos Esesmiles, Dept., Chalatenango, Salvador content: Peromyscus, Nos. 12566 and 12567, representing the smaller species were taken in shrew sets near the stream. My trapline showed no evidence of the presence of Cryptotis. There were at least a dozen sets made for two Scotinomy? them. Two Hygmys Nos. 12568 and 12569 were taken under rotten damp logs in likely places for shrews. Peromyscus, Nos. 12571 to 12574 inclusive, represent the larger species of that genus in this region, and probably the most abundant small mammal in the rain forest, where I have taken them in trees, under logs, under moss and roots, and even in my Rheomys sets in the small mountain stream. Two Heteromys, Nos. 12575 and 12574, were caught in the rain forest under logs. An Orthogeomys, No. 12579 (skull only), was cought on the east mountain slope, where it was discovered and destroyed by a turkey vulture. Another ReiThrodontmys, No. 12570, was caught in the cleared pine region. The most interesting incident of the day was the bringing to camp of two very young Lutra, Nos. 12577 and 12578,