THE ANATOMY OF NAUTILUS POMPILIUS 



15Y LAWRENCE EDMONDS GRIFFIN. 



Briiff Fclliiir of .Tohvx Iliijth'iiia VnhvrxitiJ. 

 rrnmmiinii'uli'il by Prof. Wii.i.iAM Keith Biuidkp.] 



INTRODUCTION. 



Ill the year 1890 Mr. Louis F. Menage, of Minneapolis, Minnesota, generously enabled the 

 Minnesota Aeademy of Sciences, of the same city, to make scientific collections in the Philippine 

 Islands. Prof. Dean C. Worcester and Dr. Frank S. Bournes made the expedition to the 

 islands for the Academy, gathering- in the course of their three years stay a large collection of 



scientific material. 



Certain anatomical material was comprised in the collection. This the Academy placed at 

 the disposal of the Department of Animal Biology of the University of Minnesota. 



In the collection of anatomical material were sixty-six specimens of Nwiitilm ]}ompilim. It 

 is these specimens which Professor Nachtrieb allowed me the privilege of studying after I came 

 to him as a student of zoology, and upon which the following papei- is based. 



While the specimens were not sufficiently well preserved to allow of histological study 

 throughout, they were, for the most pait, excellently preser\-ed for anatomical study, Professor 

 Worcester having taken care that they should not be contracted, and that they should lie as 

 well preserved as the circumstances permitted. Some of the external parts, however, were 

 found to be in good order for the study of their microscopical anatomy, if not for cytological 



study. 



My studies upon the Pearly Nautilus were commenced at the University of Minnesota, under 

 the guidance of Professor Nachtrieb. I wish to express my indebtedness to him for the rare 

 privilege of studying this material, in which I have found great pleasure as well as profit, and 

 to thank him for much kindness and many helps in the course of my work. 



The work has been completed since I came to Johns Hopkins University, and I wish to 

 express my gratitude to Professor Brooks for his interest in my work and for advice and 

 assistance which have enabled me, I hope, to corrtnt or to avoid some of the faults to which my 

 inexperience lays me liable. 



Professor Worcester has also been very kind to me in furnishing me with what information 

 he possessed in regard to the occurrence, habits, and mode of capture of the Nautilus. 



The soft parts of the Nautilus remained unknown until th(> year 1832. It is true that long 

 before this Rumph had published a figure of the animal, accompanied by a description of its 

 habits and portions of its anatomy, but the figure is not remarkable for its clearness, and the 

 description was unintelligible untii elucidated liy th(^ figures and accounts of later observers. At 

 a later date than Rumph, Quoy and Gaimard puldisiicd a notice regarding what they sui^posed 

 to be a portion of the body of a Nautilus. 



In the year mentioned Owen published his famous Memoir on the Pearly Nautilus. This 

 still remains the ])est work wiiicli we iiave upon the anatomv of Nautilus. When we consider 



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