208 



REPORT ON THE STATE CABINET. 



In Graptolithus {Loganogmptus) logani (Figs. 6, 6a and 7), we have 

 numerous simple stipes united in a central disc or cup ; while in some 

 specimens otherwise precisely similar, we have no remains of the disc. 

 In all these species the parts are disposed in a symmetrical and bilateral 

 arrangement. 



The stipes of this species do not bifurcate beyond the disc, and there 

 ri«- 8- are no cellules below the last bi- 



furcation. The number of stipes 

 in different individuals varies 

 from sixteen to twenty-five, so 

 that this character cannot be made 

 of specific importance. In another 

 similar species without a central 

 disc, G. miiltifasciatiis (Fig 8) from 

 the Hudson river formation, we 

 have above forty stipes, which 

 do not bifurcate, so far as known, beyond the commencement of the 

 cellules. 



Fig. 8 a. 



The separated and broken stipes referred by me to Graptolithus Sagitta- 

 rius* of HisiNGER are probably of the same species, occurring as they do 

 in great numbers in the same beds in which this one was found. 



* Paleontology of New York, Vol. i, page 272, PI. 74, fig. 1. 



