Vol. 21(2)

December / Diciembre 1973

CONTENTS / CONTENIDOS

Obituario: Harry Arnold Baylis

Helminth parasites of freshwater fishes. X. On two new trematode parasites of freshwater fishes from Lueknow, India
Verma, Sneh Lata

Wirkung von Antiaminosauren auf Trichomonas vaginalis
Christow, Chr. P.

Ptycophallus costaricensis, a new freshwater crab from Costa Rica
Villalobos, C.R.

Floración primaria del zacate gigante del Volcán Turrialba, Costa Rica
Pohl, R.W.

Some helminth parasites of Nevada bullfrogs, Rana catesbiana Shaw
Babero, B.B., & Katharina Golling

Lycoperdaceae of Costa Rica. I. The genus Morganella
Morales, María Isabel, Maryssia Nassar, & J. A, Sáenz

Biochemical and cytogenetic studies of Poecilia from eastero Mexico. I. Comparative microelectrophoresis of plasma proteins of seven species
Balsano, J.S. &, & Ellen M. Rasch

Los cíclidos (Pisces: Perciformes) de la Laguna de Términos y sus afluentes
Toral Almazán, Silvia, & A. Reséndez Medina

Food habits of some Costa Rican bats
Howell, D.J., & D. Burch

The venomous coral snakes (genus Micrurus) of Costa Rica
Savage, J. M., & J. L. Vial

Biochemical and cytogentic studies of Poecilia from eastern Mexico. II. Frequency, perpetuation, and probable origin of triploid genomes in females associated with Poecilia formosa
Rasch, Ellen M. & J. S. Balsano

Geographical distribution of Viperidae, Elapidae and Hydrophidae in Costa Rica
Taylor, R.T., A. Flores, G. Flores, & R. Bolaños

Aspects of social behavior in Poecilia latipinna (Lesueur)
Baird, R.C.

Hemoglobinas anormales en una población estudiantil universitaria
Sáenz, G.F., G. Arroyo, Ma. de los Angeles Alvarado, G. Montero, J. Jiménez & E. Valenciano

Clave para Falales (Phallales) de Costa Rica
Sáenz, J.A. Maryssia Nassar & María Isabel Morales