. A dictionary of birds . terorbital septum, andthe orbits apparently communicate with the preorbital vacuity,while the nostrils, which are situated high uj), are pervious. The^ This, with tlie spelling Plwrysrhacos, had been originally described in 1887by Dr. Anieghino {Bolet. Mus. de la Plata, i. p. 24) from its mandible as anEdentate Mammal ; but its ornithic nature was declared by him four years later{Rcvist. Argent. Hist. Nat. i. p. 255). As to the etymology of the name, con-jecture only can be entertained. That which is next to it in point of time isMesemhriornis, Moreno {Progresos del M
. A dictionary of birds . terorbital septum, andthe orbits apparently communicate with the preorbital vacuity,while the nostrils, which are situated high uj), are pervious. The^ This, with tlie spelling Plwrysrhacos, had been originally described in 1887by Dr. Anieghino {Bolet. Mus. de la Plata, i. p. 24) from its mandible as anEdentate Mammal ; but its ornithic nature was declared by him four years later{Rcvist. Argent. Hist. Nat. i. p. 255). As to the etymology of the name, con-jecture only can be entertained. That which is next to it in point of time isMesemhriornis, Moreno {Progresos del Mus. la Plata, p. 29. Buenos Aires : 1889.) 2 These are by no means the same as the nine before proposed by SeiioresMoreno and Mercerat, all but two of which are submerged, others areproposed. 3 Senores Moreno and Mercerat figured the mandibles as up^ier jaws {op. V. fig. 3, vi. fig. 2, viii. fig. 4, ix. fig. 2, pp. 20, 21). 9o6 STEREORNITHES quadrate articulates with the squamosal by two distinct heads, a. Phororhacos inflatus. Head from the side. (After F. Ameghino.) condition of which remnants may be traced in llhea and Dromseus,though not ill other liatitx, and the mandible has its hinder endtruncated as in Uhea. Unfortunately thesternum is still unknown, but the coracoidis narrow and elongated, the furcula veryslender and almost rudimentary, yet thewings, though relatively small, are com-pletely developed. The pelvis is very re-markable, being narrow and elongated, andhas the ischia produced beyond the ilia,with Avhich they are fused. Its preace-tabular portion is short and the postace-tabular very narrow. The tail is long witha relatively considerable number of separatevertebrae. There is no pneumatic foramenin the femur. The tibio-tarsus has a pro-minent cnemial crest, a distal extensorbridge and a deep intercondylar groove, thecondyles themselves being very tarso-metatarse is moderately or con-siderably elongated, Avitli the proximalinterco
Size: 2310px × 1081px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1896
