| OCR Text |
Show 1895.] LOEIUS FLAVOPALLIATUS AND PSITTACUS EEITHACUS. 321 The most striking difference is the reduction in size of the pleurapophysial lamella (pi) antero-posteriorly. It has become a delicate ridge of bone, narrower antero-posteriorly than dorso-ventrally. It is antero-posteriorly grooved externally, the groove being Fig. 10. jpz <a" Ptz h h ••- ..-d Ventral aspect of 3rd to 12th vertebrae of Psittacus erithacus.. c. Oatapophysis. d. Diapophysis. h. Hypapophysis. pi. Pleurapophysial lamella. PEOC ZOOL. Soc-1895, No. XXI. ptz. Postzygapophysis. pz. Prezygapophysis. st. Styliform lamella. 21 |
