280 RESEARCH IN CHINA. 
2. Maclurea ? or Helicotoma ? sp. A flat-coiled gastropod shell represented by 
a cross-section upon the weathered surface of the limestone. Neither 
the generic nor specific relations of the shell can be determined, but it 
probably belongs to one of the two genera Maclurea or Helicotoma, both 
of which are Ordovician forms; if it is a Maclurea it is a very small 
species of the genus. 
. Lophospira sp. This is a longitudinal section of a moderately high spiral 
shell with angular volutions, which is almost certainly a Lophospira, 
although its specific characters can not be distinguished. 
4. Orthoceras sp. Imperfect longitudinal sections upon the weathered surface 
of the limestone, similar to those at Localities C39 and C53. 
5. Asaphus ? sp. Animperfect cranidium of a trilobite. It is certainly one of 
the asaphids, but its true generic relations are not clear, and it is too 
incomplete for specific determination. 
Ge 
Locality C64.—Two and seven-tenths miles (4.3 km.) southwest of 
Yen-chuang, Shan-tung. Upper part of Ch’au-mi-tién limestone. 
1. Orthoceras sp. Longitudinal sections of two examples upon the weathered 
surface of the limestone. Both specimens are rather small and slender 
forms, the maximum width of each being about 6 mm.; they probably 
belong to two species, one of which has much closer septa than the 
other. 
Locality C 65.—Five and a half miles (9.8 km.) southwest of Tsi-nan, 
Shan-tung, from the Tsi-nan limestone. 
1. Strophomena ? sp. Several imperfect fragments of a brachiopod shell upon 
the weathered surfaces of the limestone, all of which are too imperfect 
for certain identification. 
2. Orthoceras sp. A very imperfect longitudinal section upon the weathered 
surface of the limestone. 
Locality C?—-A limestone fragment collected from gravel in the valley 
of a dry stream, 4.8 miles (7.6 km.) west-southwest of Tsi-nan, Shan-tung. 
1. Orthoceras sp. A weathered longitudinal section of a specimen having a 
maximum diameter of 55 mm. 
COLLECTION FROM SSI-CH’UAN. 
The Ssi-ch’uan collections are from two localities on the Ta-ning River 
near Sii-kia-pa, in the extreme eastern portion of the province. ‘The fossils 
occur in the uppermost layers of the Ki-sin-ling limestone, a massive forma- 
tion of dark color 3,500 feet (1,066.7 m.) in thickness, which rests conform- 
ably upon subjacent beds of Cambrian age. The material collected, although 
not extensive in amount, affords data of great importance and is sufficient 
to admit of a fairly approximate correlation of the limestones in which the 
fauna occurs. The fauna from the two localities, which are scarcely 2 miles 
(3.2 km.) apart, are much alike and indicate essentially the same horizon. 
