85 



the Baltic province and the Eriti.sh Isles in Europe, Canada and Australia, its 

 nearest ally is found in H. pyciioblastoides E'ruEKiixiE from New South Wales, 

 but in none of the forms from the northern Hemisphere. In fact there are cer- 

 tain differences between the Chinese specimen and the original of the named 

 Australian species ; thus, for instance, the corallites of the former are more 

 rounded than those of the latter. Further, Etheridge did not make mention 

 of the obliquity of the spines in the corallites of his species ; moreover, there 

 are no traces of such spinous processes in its interstitial tubes as are seen in 

 those of the Chinese form. Irrespective of these differences — some of which 

 are decidedly insignificant for the specific identification and the others are 

 those not to be taken as actual differences without further confirmation — the 

 Chinese form is believed to be identical with the Australian species, both coin- 

 ciding in all the essential points of structure. 



To the same type of Halysitcs with IL pyciioblastoides belong H. catcnu- 

 laria var. nitida L.amije and H. catcnitlnria Lambe from Canada, the latter two 

 however, differ, from the former, among many others, in having their inter- 

 stitial tubes of somewhat different outline. 



Locality : — Lo-ling-po, north of No-lu-ping, I-chang-fu, prov. Hu-pei. 

 Found in association with Fixvositcs gotlandicus Lam. 



Geological Age : — Gotlandian. 



Favosites, Lam. 

 Favosites gotlandicus Lam. 

 PI. VII., Fig. 3 a-b. 



1854. Favosites gotlandicus M. -Edwards and Haime : . Brit. Fossil 



Corals, p. 256, pi. XL., figs, i, la. 

 1879. F. gotlandicus Nicholson: Palaeozoic Tabulate Corals, p. 46, 



pi. I., figs. 1-6. 



1902. F. gotlandicus Pocta : Systeme Sil. du centre de la Boheme. 



vol. VIII., 2, p. 230, pi. LXXVI. 

 1915, F. gotlandicus YaBe and Hayasaka : Paeaeozoic Corals from 



Japan, Korea and China, p. 66. 



