Hall - p. 2 
Samples are still inadequate but distribution of chromosome numbers at 
certain of the "intermediate" localities suggests the possibility that, 
rather than a wide transition zone between chromosomally different popu- 
lations, there is limited hybridization in a narrow contact zone between 
a ca 32-chromosome south coast population and a 34-36-chromosome northeast 
population. Hall points out that the intermediate populations were taken 
at or near ecological or physiographic transitions between mesic adapted 
Blue and John Crow Mountain populations and the somewhat more xeric-adapted 
populations to the south and east. 
Hall, however, calls attention to an apparent lack of correspondence of 
the karyotypic transition zones and the subspecies boundary between A. 
grahami grahami and A. grahami aquarum as described by Underwood and Williams. 
There is obviously much here that requires confirmation and further 
study. Hall and Espinoza plead that anyone doing field work in Jamaica 
collect grahami whenever possible and send them live to the Terrestrial 
Ecology Division of the Centro Nuclear de Puerto Rico, Escuela de Medecine, 
Universidad de Puerto Rico, Departo Metropolitana (San Juan), Puerto Rico. 
