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Show 1895.] LOETUS F L A Y O P A L L I A T U S A N D PSITTACUS EEITHACUS. 329 The second lumbo-sacral vertebra is indistinguishable save for its parapophysial transverse process (pt) and thereto anchylosed long ribs, between which and the transverse process of the preceding vertebra a fossa appears. Thus, when the ventral surface of the sacrum is looked at, a fossa appears on either side between the two transverse processes of the preceding and those of the present vertebra. The third lumbosacral vertebra in Lorius fiavopalliatus bears no rib but only a short parapophysial transverse process on either side (pt), which anchyloses distally with the ilium and is slightly more antero-posteriorly extended than that of the preceding vertebra. Between these two transverse processes and those of the second lumbo-sacral vertebra a fossa is to be seen (on the ventral aspect of the sacrum) on either side, of about the same size as those between the transverse processes of the first and second lumbosacral vertebrae. The transverse diameter of the centrum is slightly wider than that of the preceding vertebra. The fourth lumbo-sacral vertebra is quite similar to the preceding one in L. fiavopalliatus, but in P. erithacus its transverse process Fig. 18. ,u en Ventral aspect of sacrum oi Lorius fiavopalliatus. en. Fused sacral vertebrae. il. Ilium. If. Lateral fossa. Is. Ilio-caudal spine. pt. Parapophysial process, pu. Pubis, |