22 



PALjfiONTOLO(iY OF NEW-YORK, 



to side by the action of waves or currents. We may see similar depressions around the roots of 

 marine plants growing in the mud, where blown by the wind when the tide is out ; with this 

 difference only, that in these cases the stem does not leave distinct impressions of its pressure 

 upon the sides, but simply a smooth or irregular funnel-shaped depression. 

 Fig. 10 is a cast from an impression similar to 9 a, b. 



408. 7. PAL^^OPHYCUSl STRIATUS ( n. sp.), 



Pl. X. Fig. 1 a, h, c, d. 



Stems simple, cylindrical, flexuous, striated longitudinally, terminated above by a swelling or 

 expansion of the stem ; plant affixed at base by numerous small rootlets. 



This species is readily distinguished by its striated stem, which is also more slender and flexible 

 than most of the smooth species. It is of rare occurrence in all the exposures of this group which 

 I have examined, and no entire specimens have been found. The stem is evidently simple, since 

 both the lower and upper portions, as well as the intermediate parts which have been found, 

 show no evidence of branches. 



Fig. 1 a. A fragment of a stem having the striated surface well preserved, with a more elevated 

 line along the centre of the portion exposed. 



Fig. 1 b. A fragment from near the base, with the rootlets preserved. 



Fig. 1 c. A similar fragment, giving indications that the stem was hollow. 



Fig. 1 d. A fragment of a small specimen, showing the upper termination. 



Fig. 2 is perhaps the expanded termination of one of these stems, which has been much flat- 

 tened : it is represented of the natural size. 



Position and locality. In the central or lower part of the group, in thin shaly sandstone, 

 near Clinton village, Oneida county. {State Collection.) 



409. 8. PAL^OPHYCUS 



Pl. 10. Fig. 3. 



This specimen presents a stem divided below, which may be due to accident, and above it ig 

 separated into three branches. 



Position and locality. Case's quarry near New-Hartford, Oneida cotmty. 



410. 9. PAL^OPHYCUS 



Pl. VIII. Fig. 3. 



This is a fragment of a soft flexuous species, presenting few characteristic features. It is much 

 compressed, and evidently hollow. 



Position and locality. Blackstone's quarry* 



