. A dictionary of birds . d elongated, andhas the ischia produced beyond the ilia,with which 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, with the proximalintercotylar tuberosity strongly developed,and the upper part of the
. A dictionary of birds . d elongated, andhas the ischia produced beyond the ilia,with which 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, with the proximalintercotylar tuberosity strongly developed,and the upper part of the anterior surfacedeeply grooved. In all cases a hallux ispresent. In Phororhacos the mandible is character- -s: N ized by the length and narrowness of the o,„ ^-^ trough-like symphysis, and the moderate Phororhacos inflatus. o ^ r j _ Head from above. divergence of the rami. In the typical P. (After F. Ameghino.) longissimus the wholc length of the mandible is about 21 in., and the medium breadth of the symphysis 2-5 STEREORNITHES 907 In a smaller species, P. infatus, of which more remains than of anyother have been recovered, the entire head measures 340 mm., ornearly 13 5 in. The tarso-metatarsus of what Dr. Ameghino considersto be a species of intermediate size, P. sehuensis, is about 1425 and 3 in. wide ; and he figures an example of the tibio-tarsusof F. injlatus which he says is 400 mm., or say 1575 in. in femur measures 230mm., or about 9 in. In Brontornis themandibular symphysis isshorter, wider and moresharply curved upwardat the tip, while therami are more divergent,their approximate lengthbeing 55 in., and maxi-mum width 4 tarso-metatarse inthis genus is relativelyshorter and stouter thanin Phormhacos, having alength of about 15*5 in.,and a maximum distalwidth of 0-25 in. Theassociated tibio-tarsus ofBronfornis, mesiSUTes 30 5in. and the former 15 5in. The species, , therefore at-tained a stature approxi-mately equal t
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Keywords: ., bookauthorlyde, bookcentury1800, bookdecade1890, booksubjectbirds
