714 MISS B. LINDSAY ON THE AVIAN STKRNUM. [June 16, 



MM. Cuvier et G. cle St.-IIilaire ; presentees a I'Academie 

 des Sciences, 1830. (Abstract in ' Les Annalts des Sciences 

 Naturelles.') 



2. C. G. Carus. Lehrbuch der Zootomie (pp. 158, 1/9). 

 Leipzig, 1834. 



3. C. Gegenbaur. (For first view.) Grundziige der vergl. 

 Anat. 1859. 



4. Harting. L'Appareil Episternal des Oiseaux. Utrecht, 

 1864. 



5. C. Gegenbaur. (For second view.) Untersuchungen zur 

 vergl. Anat. der Wiibelthiere : 2 Heft, Schultergiirtel der 

 Wirbelthiere. Leipzig, 1865, 



Grundriss der vergl. Anat. 1877. 



6. W. K. Parker. A Monograph on the Structure and Develop- 

 ment of the Shoulder-Girdle and Sternum in the Vertebrata. 

 Ray Soc. 1868. 



7. T. H. Huxley. Manual of the Anatomy of Vertebrated 

 Animals. London, 18/1. 



8. Newton and Parker. Encycl. Brit., article " Birds." 



9. A. GoTTE. Beitiiige z. vergleich. Morpbol. d. Skeletsystems 

 d. Wirbelthiere. Brustbein und Schultergurtel. Archiv fiir mikr. 

 Anat. vol. xiv. 1877. 



10. C. K. Hoffmann. Beitriige z. vergleich. Anat. d. Wirbel- 

 thiere. Niederlandische Archiv f. Zool. vol. v. 1879. 



11. A. Sabatier. (For theory of Avian precoracoid.) Com- 

 paraison des ceintures et des membres anterieurs et posterieurs 

 d. la Serie d. Vertebres. Montpelier, 1880. 



12. G. RuGE. (For homologies of Mammalian interclavicle 

 so-called.) Untersuch.iiber Entwick.amBriistbeine d.Menschen. 

 Morphol. Jahrbuch, vol. vi. 1880. 



13. F. M. Balfour. Comparative Embryology. Vol. ii. oh. 

 xviii., XX. 1881. 



14. P. Albrecht. (For homologies of so-called interclavicle of 

 Mammalia.) Sur les Elements Morphologiques du Manubrium 

 du Sternum chez les Mammiferes. Bruxelles, 1884. 



EXPLANATION OF THE PLATES. 



The letters CO. here and in the woodcuts indicate that the specimen figui-ed is 

 in the Collection at the University Museum of Zoology, &c., Cambridge. 



General Lettering of all the Plates. 



c. Coraooid. 

 p.c. Precoracoid. 



sc. Scapula. 



in. Equivalent of the mammalian 

 manubrium sterni. 

 m.s. Metasternum. 



h. Head of humerus. 



a.l.p. Anterior-lateral process. 



p.l.p. Posterior-lateral process. 



r.m. ]\Jedian hand of the rectus abdo- 

 minis nuiscle. 



r.l. Lateral baud of the rectus abdo- 

 minis muscle, attached to^j./jj. 



y. Line of undifferentiated muscle, 

 bordering on the yolk-sac, and 

 curved to make room for it. 



