Vol. 17 (2)

December / Diciembre 1969

CONTENTS / CONTENIDOS

The post-cranial osteology of Chilonycteris psilotis
Walton, G.M. & D.W. Walton

Species diverity and ecology of tidepool fishes in three Pacific coastal areas of Costa Rica
Weaver, P.L.

Two cases of bat pollination in Central America
Baker, H.G.

The life cycle and behavior of the social bee Lasioglossum (Dialictus) umbripenne (Hymenoptera: Halictidae)
Wille, A. & E. Orozco

Mecanismo de la patogénesis de las lesiones amebianas
Villarejos, V.M.