40 RESEARCH IN CHINA. 
numerous nodules and thin seams of limestone embedded in the shales. 
The cephala and pygidia of Agnostus and several larger trilobites are so 
abundant here that a considerable proportion of the rock is composed 
of their remains. ‘The collections from the lowest stratum of this member, 
about 4 miles north of Sin-t’ai-hién, yield the following: 
Anomocarella albion Walcott 
Anomocarella chinensis Walcott 
Dolichometopus deots Walcott 
Dorypyge richthofent Dames 
Acrothele rarus Walcott 
Orthotheca delphus Walcott 
Agnostus chinensis Dames 
Agnostus kushanensis Walcott 
Anomocare alcinoe Walcott 
In the mountains southwest of Yen-chuang the basal layers of these 
shales preserve a rich fauna, having at least four species in common with 
the locality farther south, which has just been mentioned. The majority 
of these were found, as in the former case, in nodules of dense gray 
limestone: 
Protospongia chloris Walcott 
Acrotreta pacifica Walcott 
Agnostus chinensis Dames 
Anomocarella chinensis Walcott 
Platyceras chronus Walcott 
Hyolithes cybele Walcott 
Orthotheca delphus Walcott 
Arionellus alala Walcott 
Dolichometopus alceste Walcott 
Dolichometopus deois Walcott 
Near this place a larger collection was secured from numerous calcareous 
nodules, not only at the base of this shale, but also ranging through a ver- 
tical thickness of 20 to 30 feet, 6 to 9 meters. The following list, therefore, 
includes not only many of the previous list, but some species of slightly 
later age: 
Protospongia chloris Walcott 
Acrotreta pacifica Walcott 
Obolus minimus Walcott 
Obolus (Lingulella) damesi Walcott 
Obolus (Westonia) blackweldert Walcott 
Platyceras chronus Walcott 
Hyolithes cybele Walcott 
Orthotheca cyrene dryas Walcott 
Agnostus chinensis Dames 
Agraulos divi Walcott 
Artonellus agonius Walcott 
Dolichometopus derceto Walcott 
Dolichometopus deois Walcott 
Dorypyge richthofent Dames 
Dorypyge bispinosa Walcott 
Anomocare latelimbatum Dames 
Anomocare temenus Walcott 
Anomocare biston Walcott 
Anomocare daunus Walcott 
Anomocarella albion Walcott 
Anomocarella chinensis Walcott 
Anomocarella contigua Walcott 
Ptychoparia tellus Walcott 
Menocephalus sp. undt. 
Fossils from the middle lmestone.—Much of the middle limestone 
member seems to be without fossils, but here and there in the section 
certain layers yield them plentifully. All of the collections from this 
member come from the mountain 3 or 4 miles, 5 or 6 kilometers, 
southwest of Yen-chuang. In the lower layers we found a fauna closely 
allied with the preceding forms, and consisting of: 
Hyolithes cybele Walcott 
Anomocarella chinensis Walcott 
Acrotreta shantungensis Walcott 
Obolus (Lingulella) chinensis Walcott 
