290 RESEARCH IN CHINA. 
CORRELATION OF THE FAUNA OF THE KI-SIN-LING LIMESTONE. 
A small Ordovician fauna from southern Shen-si has been described by 
Martelli,! with which this fauna from the Ki-sin-ling limestone must be com- 
pared. Only six species have been recorded by Martelli, four of which are 
brachiopods, with one bryozoan and one annelid tube; of one of the brachi- 
opods two varieties are recognized. Martelli’s list of species is as follows: 
Orthis calligramma Dalman, var. serica var. nov. Orthisina giraldii sp. nov 
Orthis calligramma Dalman, var. davidsoni de Verneuil Fenestella ambigua Hall 
Schizophoria polot sp. nov. Spirorbis inornatus Hall 
Porambonites intercedens Pander 
It is scarcely worth while to recognize the two varieties of Orthis call- 
gramma as distinct; the species is frequently more or less variable, and the 
Shen-si examples seem to be essentially like those collected by the members 
of the Carnegie Institution of Washington Expedition, and all these Chinese 
specimens closely resemble those from Russia illustrated by de Verneuil. 
The Orthisina giraldii of Martelli is apparently a true Hemipronites, and isa 
very close ally of the species described in the present paper as H. tenwistriatus. 
The examples of Porambonites intercedens and Schizophoria poloi of Martelli’s 
list seem both to be representatives of a single species with which one of 
the brachiopods collected in Ssi-ch’uan by Mr. Blackwelder is apparently 
identical; the species, however, should undoubtedly be referred to the genus 
Triplecia. The two additional species of Martelli’s list, Fenestella ambigua 
and Spirorbis inornatus, have no representatives in the Ssi-ch’uan fauna, and 
the identity of these Chinese examples, associated as they are with typical 
Ordovician brachiopods, with species described by Hall from the Niagaran of 
North America, is extremely doubtful, to say the least. 
The essential species in Martelli’s list, therefore, which must be con- 
sidered in a comparison of the Shen-si fauna with that of Ssi-ch’uan, are only 
three in number—Orthis calligramma, Hemtipronites giraldu, and Triplecia 
polot. Of these species two are recognized in the present Ssi-ch’uan fauna 
and the third, Hemipronites giraldit, has a very close ally in H. tenutstriatus; 
the faunas from the two localities may be safely considered as marking the 
same geologic horizon and in all probability the same limestone formation. 
The two localities, indeed, are situated in the same general region of China, 
Martelli’s specimens having come from a locality in the Ts’in-ling Mountains 
to the north of the Han River Valley, while the collection described in the 
present paper came from the southern side of the same valley; the two local- 
ities probably are not over 200 miles (320 km.) apart and may perhaps be 
even more nearly approximate. 
Several small collections of fossils secured by Baron von Richthofen in 
northern Ssi-ch’uan, from the region about Tshau-tién, have been described by 
Kayser,” this locality being about 300 miles (480 km.) west of Ta-ning, near 

'Fossili del Siluriano Inferiore dello Schensi (Cina), by Alessandro Martelli, Boll. della Soc. Geol. Ital., 
vol. xx (1901), pp. 295-310, pl. iv. 
*Mittel- und Obersilurische Versteinerungen aus dem Gebirgsland von Tschau-tien, by Emanuel Kayser 
(Richthofen’s China, vol. Iv, pp. 37-74, plates 2, 3, 4). 
