. On the anatomy of vertebrates [electronic resource] . sthe species vary, not only in regard to their form and proportions, but also their existence;and in the varieties ofthese teeth we may dis-cern the same inverserelation to the develop-ment of the horns whichis manifested by the ca-nines of the , the two-hornedRhinoceroses of Africa, which are remarkable for the great lengthof one (Rh. bicornis, Rh. simus) or both (Rh. Keitloa) of thenasal weapons, have no incisors in their adult dentition; neitherhad that great extinct two-horned species (Rh. tichorinus), theprodigious deve
. On the anatomy of vertebrates [electronic resource] . sthe species vary, not only in regard to their form and proportions, but also their existence;and in the varieties ofthese teeth we may dis-cern the same inverserelation to the develop-ment of the horns whichis manifested by the ca-nines of the , the two-hornedRhinoceroses of Africa, which are remarkable for the great lengthof one (Rh. bicornis, Rh. simus) or both (Rh. Keitloa) of thenasal weapons, have no incisors in their adult dentition; neitherhad that great extinct two-horned species (Rh. tichorinus), theprodigious development of whose horns is indicated by the singu-lar modifications of the vomerine, nasal, and premaxillary bones,in relation to the firm support of those weapons. The Sumatranbicorn Rhinoceros combines, with comparatively small horns,moderately developed incisors in both jaws. The incisors are oflarger size in the unicorn Rhinoceroses (Rh. Indicus and Rh. Son-daicus); still larger, relatively, in the hornless Acerotherium andHyrax, figs. 286, 287, 286
Size: 1495px × 1671px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubject, booksubjectbirds, booksubjectfishes
