276 RESEARCH IN CHINA. 
About 2 miles, 3 kilometers, north of Ta-ning-hién, we found in the 
lowest layers of the Wu-shan limestone a varied, although poorly pre- 
served fauna. ‘The rock is a dark gray limestone which is locally rich in 
nodules of flint. Being more resistant to weathering, the fossils stand out 
in relief on the exterior surfaces. In most cases it has been impracticable 
to identify the species positively. The list from this locality included: 
Schwagertna sp. Productus (2) sp. 
Lonsdaleia chinensis Girty Spirifer blackweldert Girty 
Michelinia favositordes Girty Spirifer sp. 
Syringopora sp. Pelecypod indet. 
Geinitzella chinensis Girty Euomphalus sp. 
Fistulipora waageniana Girty Phillipsva sp. 
Orthotichia (2) sp. Crinoidal fragments 
Another small collection was taken also from the basal layers of the 
Wu-shan formation, 1 mile above the junction of the two main tributaries 
of the Ta-ning river north of Miau-ir-t’an. It has only one species in 
common with the last, but a larger collection would doubtless show closer 
resemblance between the two: 
Carneqia basslery Girty Martinia (?) sp. 
Derbya sp. Hemiptychina (2) (cf. Hemiptychina orientalis) 
Productus (2) sp. Notothyris willisiana Girty 
Near the salt wells of Yen-ch’ang, on the Ta-ning-ho, another fossilif- 
erous horizon was discovered, about 800 to 1,000 feet, 240 to 300 meters, 
above the base of the formation. This is exposed in the axis of an anti- 
cline which is cut through by the canyon a little more than a mile east 
of the village. The only fossils found here are numerous bryozoans, 
embossed upon the weathered surfaces of the dark gray limestone: 
Geinttzella chinensis Girty Batostomella meekana Girty 
In the limestone canyon below Ta-ning-hién, a few poorly preserved 
fossils were found in brownish cherty layers. The exact position of this 
horizon in the section was not determined, but it is probably not far from 
the middle of the Wu-shan formation. These fragments comprise: 
Schizodus sp. (ef. Schizodus curtus) Gastropod indet. 
At Tung-kuan-k’ou, about 1 mile, 1.5 kilometers, south of the point 
where fossils were found in the top of the Sin-t’an, a very few fossils were 
collected in débris from a thin seam of black shale which was associated 
with a layer of anthracite coal. The rocks lie in the middle of a vertical 
syncline and are believed to occur about 1,200 feet, 350 meters, above 
the base of the Wu-shan limestone: 
Chonetes sp. Ambocelia sp. (cf. Ambocelia planiconvexa) Clhiothyris (2) sp. 
The upper half of the Wu-shan formation consists of massive dark 
limestone, almost without interruption; fossils are apparently rare, 
