THE LIGNITIC STAGE. 



BY 



Gilbert D. Harris. 



PART II. 



Scaphopoda, GASTROPODA, Pteropoda 

 and Cephalopoda. 



Preliminary Considerations. 



Part I, on the Eignitic Pelecypoda, was published as Bulletin 

 No. 9 (June 15, 1897) and hence forms a part of volume 2. It 

 would have been better, doubtless so far as convenience of ref- 

 erence is concerned, could the present work have followed as 

 Bulletin No. 10, thus having a continuous pagination with No. 9. 

 This, however, seemed impossible for want of time for its prep- 

 aration during the fall of 1897; hence another took its place, 

 and this is of necessity relegated to vol. 3. 



The general plan and purpose of these publications has already 

 been duly set forth. We may therefore proceed dire(5ll3' to the 

 subjedt matter of this paper as designated by the above- 

 given title. 



Scaphopoda. 



DENTALIUM. 

 Dentalium microstria, PI. i, Hg. i, a. 



Syn. D. microstria Heilp., Proc. Ac. Nat. Sci. Phila., 1880, p. 375, pi. 

 20, fig. 3. 

 D. microstria Aid., Bull, Am. Pal., vol. i, p. 55, pi. 2, fig. 6. 



Heilprin'' s original description. — "Shell slender, considerablj' 

 curved and greatly attenuated, faintly striated, the striae mo.st 

 conspicuous on the attenuated portion; posterior aperture entire, 

 there being no fissure; anterior aperture circular. 



"Length, ij4 to 2 inches. Cave branch; Woods bluff, 



