105 



that VON RiCHTHOFEN obtained cam; from Ning-chiang-chou (Ning-kiang- 

 ".'tsch{3u of Richthofen), because these two places are quite near to each other, 

 "though they He in different provinces. Lung-tung-pei is a lit.le hamlet on the 

 sroad from Ning-chiang-chou in Shen-hsi to Chau-tien-chonn in Sze-chuan. 



2) South of - San-toi-pa, Chao-hua-hsien, Pao-ning-fu, prov. Sze- 

 chuan. 



In the first locality this species was found in association with A. reticularis 

 var. dcsquaviata and Rhynchonalla parallelepipcda, while in the second 

 locality it was accompanied by Dalnianclla striatnla ScHLOXHEnr. 

 ' Geological Age : — Middle Devonian, 



According to Kavser the associate fossils, RhyncJionclla proaihoidcs var. 

 :and OriJiis AlacFarlaiici represent the Upper Devonian Age. Ya^i.^da, how- 

 -ever, collected it with another variety, dcsquaiiiaia and R/iyiic/ionclla paral- 

 Jelepipcda at one and the same place, thus apparently establishing its Middle 

 Devonian Age. On the other hand this fossil was found in company with 

 Dalnianella striatnla which is present throughout all the stages of the Devo- 

 nian Formation but most predominant in the Middle Devonian. Again 

 .Dalmanclla striatnla was discovered by Yamada in the province of 

 ,Kwang-hsi in association with Spirifer zicrjac var. iindccimplicata, which 

 lived from the later part of the Middle Devonian to the early part of the 

 Upper Devonian Age. In the province of Kwei-chou the said Dalviaiiella 

 was collected tpgether with Spirifer disjiuictns var. vcrneuili, an Upper De- 

 vonian fossil. 



As has been said above, Richthofen seems to have purchased specimens 

 of various species at Lung-tung-pei, so it is not very clear whether the species 

 ^mentioned by him as occurring in this district were really yielded by one 

 ^locality. 



