Ameghino, the bones have been sumptuously monographed by F.
The Azores have been monographed by F.
Of the two Italian botanists who in comparatively recent years have monographed the group, Parlatore (Le Specie dei cotoni, 1866) recognizes seven species, whilst Todaro (Relazione sulla culta dei cotoni, 18 7718 78) describes over fifty species: many of these, however, are of but little economic importance, and, in spite of the difficulties mentioned above, it i s possible for practical purposes to divide the commercially important plants into five species, placing these in two groups according to the character of the hairs borne on the seeds.
The skull has been monographed by T.
Of its several dozen genera only two extend through and beyond Central America: Ameiva into the eastern and western Hot-lands of Mexico, Cnemidophorus (monographed by H.