REPORT ON UPPER PALEOZOIC FOSSILS FROM CHINA. 315 



Geinitzella chinensis Girty. 



Plate 28, Figures 9-14. 

 Geinitzella chinensis GIRTY, 1907, Proc. U. S. Nat. Mus., vol. xxxin, p. 42. 



The growth of this species is dendroid, specimens occurring in long cylindrical 

 trunks, from which in some instances spring smaller branches. All the specimens 

 examined are fragmentary, the largest having a length of no mm. They vary 

 much in point of size. The largest yet noted has a diameter of 17 mm., but the 

 average is nearly 15 mm. In some specimens low monticules, more or less distinctly 

 elongated in a transverse direction, form a noticeable feature, which may have been 

 present in all. The mature region, where the cells had a horizontal direction, 

 measures 4 mm. in a large example. 



In thin sections the species shows the usual structural variation where different 

 stages of development are examined. From 7 to 8 cells occur in a linear distance 

 of 2 mm. The acanthopores are large, and vary greatly in number and appearance 

 in sections made at different points of the same zoarium. In longitudinal section 

 a few scattered diaphragms occur just before the cells thicken their walls and bend 

 into a horizontal direction. 



This species is closely related to Geinitzella columnaris Schlotheim, as identified 

 by Waagen and Wentzel in India, but it hardly seems that the Chinese form can be 

 immediately placed with that species. Waagen and Wentzel state that G. columnaris 

 rarely attains a size of 5 mm. and that a diameter of but 2 mm. is often met with. 

 The Chinese form is thus seen to be at least three times as large. So far as observed 

 also, it is never incrusting, a mode of growth which the Indian form is said to exhibit. 

 In thin sections, however, the two species are extremely similar. One distinction 

 which appears to exist is that the cells are a little larger in the Chinese form. Waagen 

 and Wentzel do not state this character in their description, and certain discrepan- 

 cies which appear to exist between different degrees of magnification, said to be 

 represented by their figures, make it impossible to obtain altogether reliable meas- 

 urements from that source. Apparently G. columnaris presents nine or ten cells 

 in 2 mm. The presence or absence of diaphragms is not stated in the text of their 

 description, but none are represented in their figures. The Chinese form certainly 

 possesses diaphragms, and it seems likely that they will also be found in that from 

 India. 



With the differences above noted it seems inadvisable to refer the Chinese form 

 to G. columnaris, though it is possible that it will prove no more than a variety, better 

 marked, however, than any of the varieties recognized by Waagen and Wentzel. 



Locality and Horizon. Pennsylvanian (Wu-shan limestone) ; near Ta-ning- 

 hien, East Ssi'-ch'uan (stations i and 4). 



Batostomella meekana Girty. 



Plate 29, Figures 6-8. 

 Batostomella meekana GIRTY, 1907, Proc. U. S. Nat. Mus., vol. xxxin, p. 43. 



This form has not been found free, and the following description has been drawn 

 up from thin sections. It evidently occurs as cylindrical, probably branching, 

 stems, of which some grew to a diameter of 4 mm., while others are only about 

 3 mm. thick. 



The cells are slightly oval in outline, one diameter being a little greater than 

 the other. In the mature region they are separated by intervals about equal to 

 one-half their own diameter, and number about five in 2 mm. longitudinally. The 

 acanthopore-like granules are relatively few, and as a very prevalent rule occur in 



