398 DR. ST. GEORGE MITART ON THE SKELETON OF [May 7, 



(6) Paroccipital processes more sharply inclined backwards. 



(7) More distinct from relatively smaller quadrates. 



(8) Orbits more deeply incised dorsally. 



(9) Prosopium in front of nares at first less sloped, afterwards 



more sharply so. 



(10) Nostrils look more dorsad and are larger. 



(11) No excavation in front of each. 



(12) Internasal space narrower. 



(13) Hindermost part of tomial margin concave. 



(14) Margin above suprajugular process usually straight. 



(15) Lachrymal process of prosopium minute and almost on a 



line with dorsum of cranium. 



(16) Prosopial angle 50°. 



(17) Bony palate more concave. 



(18) Its free median hinder margin as long as the two palatal 



articulations conjoined. 



(19) Lateral palatal processes ventrally grooved. 



(20) Preaxial end of zygoma less dorso-ventrally expanded. 



(21) Ventral margin of palatines more concave. 



(22) Posterio-inferior angle more prominent. 



(23) Posterior palatine process very much shorter. 



(24) Lachrymal nearly reaches sphenotic. 



(25) An ectosphenotic process. 



(26) Meatus auditorius externus limited in fi-ont by a delicate 



lamella behind quadrate column. 



(27) Posterior margin of meatus auditorius externus concave at 



upper two-tliirds, slightly convex below this. 



(28) Posterior part of body of quadrate smaller. 



(29) Antero-posterior groove outside lachrymal very marlied. 



(30) Mesiad inflated part of palatine more cousiderable. 



(31) Precondyloid fossa deep. 



(32) Posterior margin of basipterygoid shield like a wide letter 



M. 



(33) Infero-external surface of paroccipital process strongly 



concave transversely. 



(34) Quadrat^^ column longer and more slender. 



(35) Geniohyoid fossa more marked and relatively nearer to 



the postaxiai margin of symphysis. 



(36) No ramal defect of ossification. 



(37) Symphysis relatively much longer. 



(38) Mandible less concave from apex to dentary process. 



(39) Eami and symphysis form together a pointed arch. 



(40) Ramus narrows more gradually backwards. 



(41) Margin between prearticular and coronoid processes 



shorter and steeper. 



(42) Margin between coronoid and postcoronoid processes longer 



and less concave. 



(43) No postarticular process. 



