270 PALEONTOLOGY OF NEW-YOEK. 



325. 6. GRAPTOLITHUS RAMOSUS (m. s;j.). 



Pl. LXXIII. Figs. 3 a- A. 



Stipe linear, narrow, scarcely one line in breadth, compressed ; serrated on both sides, 

 except the branches ; teeth obtuse, distant, somewhat narrowed towards the base, more 

 than half the width of the stipe ; stipes bifurcating or ramose ; branches slender, linear, 

 serrated only on the outer margin. 



This species may be distinguished from the last by a careful examination of the serratures, 

 which are proportionally deeper and more distant, as well as slightly more oblique and' 

 narrowed towards the base. The radical termination has not been seen, and the species 

 usually occurs in fragments of the simple undivided stem, or with a single bifurcation 

 towards the extremity. Other specimens show a wide bifurcation with divergent branches, 

 and others again are several times branched. 



When preserved in a tolerable degree of perfection, this is a beautiful and interesting 

 species, presenting a character before unknown in this genus of fossils. The separate 

 branches which are serrated on one side only, can be readily distinguished from the G. 

 Sagittarius and G. tenuis, as well as from the preceding species, by the form and distance 

 of the teeth, which are quite different in these species. 



Fig. 3 (I, a'. Small specimens near the radical termination, having a simple bifurcation above. This is 

 the more common form. 



Fig. 3 4. A specimen with a more diverging and elongated bifurcation, with a smaller specimen lying 

 obliquely across the right ramus. 



Figs. 3 i' &. 3 i". The same species. 



This and the preceding species are here grouped together on the same fragment of slate. 



Fig. 3 c, d. Enlarged portions of the two preceding specimens. 



Fig. 3 e. A specimen with elongated rami, which are serrated on one side only. 



Fig. 3/ A specimen branched below, and bifurcating above. The branches and bifurcate stipe above 

 are serrated on one side only, while the stipe below and between the branches and bifurcation 

 is serrated on both sides. This unique specimen proves that the inhabitant had the power of 

 throwing out lateral shoots without dividing its axis; and also that the axis, when divided, 

 does not afterwards become a perfect stipe in each of its two parts, tlie serrae continuing on 

 one side only. 



Fig. 3 g, h. Enlarged portions, showing the character of the teeth at the points of divergence, below 

 and upon the branches. 



Position and locality. This species ha.s only been obtained from the black glazed slates 

 on the Norman's kill, near Albany, though it will probably be found in the localities of 

 other species in Columbia county, and perhaps at Ballston, Saratoga county. 



{Slate Collection.) 



