Webster - p. 3 
Hybrids are sufficiently different from both parental species that, of those 
specimens identified as hybrids when collected, about 90% were correctly 
classed. Two A. brevirostris and one A. d., ravitergum were confused with 
hybrids. a 
Differences in hybrid coloration at the two localities may be determined 
by genetic differentiation in A, brevirostris. A. d. ravitergum at the two 
localities are quite similar. 
There is as yet no evidence for backcrossing. As hybrids are locally 
common, their successful reproduction must be rare. As mentioned above, the 
karyology of male hybrids from 0,5 km E of Cachon indicates complete sterility 
for that sex, 
Hybridization of A. d. ravitergum and A. brevirostris is additional 
evidence that the dewlap is a ma jor cue, perhaps the major cue in species 
(or deme - see Williams below) recognition within the distichus group. At 
localities where A. distichus and A, brevirostris differ strikingly in 
dewlap color, hybridization is less frequent. Of 82 A, brevirostris A and 
22 A. distichus dominicensis from Montrouis, Haiti, only one "A, distichus" 
was an F, hybrid. At Manneville, Haiti (A. brevirostris C and A. d. 
dominicensis), hybridization is unknown, but no A, i from this 
locality have been examined electrophoretically. 
Of the many subspecies of A. distichus, Webster is giving d. ravitergum 
most attention. In its tolerance of, indeed restriction to, arid conditions, 
it is more similar to A. brevirostris than any other distichus, 
3. Anolis cybotes species group. Webster is studying geographic 
differentiation in A. cybotes electrophoretically with emphasis on genic 
variation but with attention to allelic frequencies, Relationships within 
the species group are also being studied, but in both cases some additional 
populations should be sampled, 
. Anolis karyology. The two most recently discovered species of West 
Indian Anolis have been karyotyped by Webster. Anolis sheplani, a close 
relative of A. occultus of Puerto Rico, has the saurian ancestral diploid 
pattern of 12 macrochromosomes and 24 microchromosomes. In contrast, the 
single male A. fowleri provided by Albert Schwartz gave peculiar results. 
Diploid number was 44, but the 20 macrochromosomes do not sort into 10 pairs 
of morphologically identical homologues. There is considerable asynapsis in 
the first meiotic division and the first division is not reductional. 
5. Anolis fowleri and the monticola group. Schwartz considers the 
recently described species A. fowleri a member of the monticola group. 
Electrophoresis was therefore used in an attempt to illuminate two problems 
with A. fowleri: its peculiar karyology (as known from one male) and its 
relationships with other Hispaniolan anoles. Tissues from the single 
