PROCEEDINGS 



GENERAL MEETINGS FOR SCIENTIFIC BUSINESS 



ZOOLOGICAL SOCIETY OF LONDON. 



PAPERS. 



24. The Head Cavities and Development o£ the 'Eije 

 Muscles in Trichosurus vulpecula, with Notes on some 

 other Marsupials. By Elizabeth A. Fkasek, B.Sc. 

 (Lond.), F.Z.S.j Embryological Laboratory, Department 

 of Zoology, University o£ London, University Colleo-e. 



[Received April 23, 1915 : Read May 11, 1915.] 

 (Plates I., II.* and Text-figures 1-26.) 



Index. • Page 



Introduction 299 



Material 302 



The Eye Muscles of the Adult 303 



Description of Material 304 



Summary of Events in Tricliosurit^ vulpectda 328 



Notes on other Marsupials 330 Intiii -« 



Ph a scalar ctos 330 .''v.«,C<^'*" ' *"'''^<L - 



Phascolomys 333,.'' ' ..\v^ ■ *t 



Macropiis 33&i-j'' 



Sz;S^ ::::::::::::;;::::;:::::;::;:;::::::::::::::::::;:: f JAN S 1916 



Dasytirus 330 



Concluding- Remarks 33gV A; asV^ 



Bibliography 342\C*«^epa| ^\U§>'^ 



Introduction. 



The following investigation of the head-cavities and develop- 

 ment of the eye muscles of Tricliosurus vulpecula was undertaken 

 at the suggestion of Professor J. P. Hill, whose help and advice 

 I gratefully acknowledge. All the material examined was 



* For explanation of the Plates see p. 346. 



Pkoc. Zool. Soc— 1915, No. XXIL 22 



