Development of the dendrobatid frog Colostethus machalilla.

To provide a developmental correlate with other frogs, we prepared a normal table of development for the dendrobatid, Colostethus machalilla and analyzed the morphology of its early development. This frog reproduces in captivity and deposits moderately sized eggs (1.6 mm in diameter) in terrestrial nests.

[Cremation. A public health chapter in Mexico].

Cremation was a part of the funeral ceremony in prehispanic Mexico. When the Spanish conquerors came, this practice was prohibited. In 1877, the Uppu Health Council authorized animal incineration to avoid consumption by indigents or transformation in putrid emanation.

Lamina-associated polypeptide 2 (LAP2) expression in fish and amphibians.

Somatic and germinal cells of 15 fish and 33 amphibian species were examined by SDS-PAGE followed by immunoblotting to determine the expression of LAP2 (lamina-associated polypeptide 2). LAP2 expression in frogs, salamanders and fish does not vary with the mode of reproduction. In fish and frog cells, a rim-like LAP2 positive region was detected around the nucleus by indirect immunofluorescence microscopy.