CONTENTS. 



PART I, 



Page 

 Art. I. — On the Circulation of Sap in Plants. By Dr. Hermann 



Hoffmann 1 



Art. II. — Upon the Male of Argonauta Argo and the Hectocotyli. 



By Professor Heinrich Muller of Wiirzburg 52 



Art. III. — A few Remarks upon Hectocotylus. By C. Th. von 



SiEBOLD, Professor at the University of Breslau 92 



Art. IV. — Investigation of the Question: Does Cellulose form 

 the basis of all Vegetable Membranes? By Hugo von 

 MoHL 95 



PART II. 



Art. IV. — Investigation of the Question : Does Cellulose form 

 the basis of all Vegetable Membranes? By Hugo von 

 MoHL {continued) 97 



Art. V. — Memoir upon the Hectocotyli and the Males of certain 



Cephalopods. By MM. J. B. Verany and C. Vogt 119 



Art. VI. — Organographical Observations on certain Epigynous 



Monocotyledons. By H. Cruger, of Trinidad 155 



Art. VII. — Fragments relating to Philosophical Zoology. Se- 

 lected from the Works of K. E. von Baer 1/6 



