FAUNA OF THE KI-SIN-LING LIMESTONE. 291 
which place the collections were made by the Carnegie Institution of Washing- 
ton Expedition. These fossils are from several horizons, which are designated 
as follows: (A) Neighborhood of Kiau-tshang-pa; (a) dark trilobite limestone; 
(b) light gray brachiopod limestone; (c) red brachiopod and crinoidal lime- 
stone; (d) marly coralline limestone between Kiau-tshang-pa and Shom- 
hsuen-yi; (B) Remains from the neighborhood of Tshau-tién: (a) light-colored, 
crystalline, oolitic, brachiopod, and crinoidal limestone. Both Ordovician 
and Silurian faunas are included in these collections, the Ordovician faunas 
being those of the dark trilobite limestone, and the light gray brachiopod 
limestone from the neighborhood of Kiau-tschang-pa. The relations of the 
strata in this locality have been shown by von Richthofen,! these two beds 
being included in the axial portion of an overturned anticline among the 
lowest strata of the section. 
The known faunas of these two Ordovician beds are not large, the follow- 
ing forms being recorded from the dark trilobite limestone: 
Asaphus sp. Trinucleus richthofeni n. sp. 
Calymene sp. Orthis kiautschang pensis n. sp. 
None of these forms can be identified among the collections of the recent 
expedition. The species described as Orthis kiautschangpensis seems to be 
a member of the genus Plectorthis, and somewhat resembles the form here 
described as P. willisi, but it is proportionately broader toward the hinge- 
line and has more angular cardinal extremities; two of the genera of trilobites 
Asaphus and Calymene, also occur in the recent collections, but Trinucleus 
has not been detected, although this genus would not be out of place in such 
a fauna as has been recognized. 
From the light gray brachiopod limestone the following forms have been 
recorded : 
Orthis calligramma Dalman var. Strophomena corrugatella Davidson ? 
Lepiena sericea Sowerby Spirifer radiatus Sowerby 
Of these species Orthts calligramma is one of the most conspicuous members of 
the faunas described in the present paper from Sii-kia-pa, near Ta-ning, and 
an undetermined species of Strophomenais another one of the common species. 
Leptena, or, more properly, Plectambonites sericea, has not been detected, 
although it would not be out of place in association with Dalmanella testudi- 
naria. ‘The shell referred to Spirifer radiatus by Kayser is probably incor- 
rectly determined; the species and even this genus would be entirely out of 
place in any fauna with Orthis calligramma and the other forms recorded, and 
judging from the illustrations the specimens are too imperfect to permit their 
certain identification as Spirifer. It is not impossible that this so-called 
Spirifer radiatus is allied to the forms described in this paper as Hemzipronites 
tenuistriatus, although thetwo forms are certainly distinct, at least specifically. 
1China, vol. 11, pp. 597-598, fig. 108. 
