DESCRIPTION OF GENERA AND SPECIES. 281 
Locality 20/C is in a gulch just northeast of Sii-kia-pa, and has furnished 
the following species: 
Strophomena sp. undt. Bathyurus sp. undt. 
Triplecia poloi Martelli Asaphus sp. cf. A. expansus Dalman 
Orthis calligramma Dalman Asaphus asiaticus Weller 
Plectorthis willisi Weller Asaphus chinensis Weller 
Dalmanella testudinaria (Dalman) Asaphus several spp. undt. 
Dalmanella subequata (Conrad) Tsotelus sp. undt. (hypostome) 
Clitambonites chinensis Weller Tsotelus sp. undt. (pygidium) 
Hemipronites tenuistriata Weller Illenus ? bronteoides Weller 
Gastropod (gen. and sp. undt.) Proetus ? sp. undt. 
Cyrtodonta ? sp. undt. Calymene ? sp. undt. 
Ampyx chinensis Weller Pterygometopus ? sp. undt. 
Locality 20/B is at the narrows in the river about 1.5 miles (2.4 km.) 
above Sii-kia-pa, and has furnished the following species: 
Lingula ? sp. undt. Ampyx sp. cf. A. costatus Boeck 
Strophomena sp. undt. Asaphus blackwelderi Weller 
Plectorthis willisi Weller Asaphus taningensis Weller 
Dalmanella testudinaria (Dalman) Asaphus levis Weller 
Clitambonites chinensis Weller Asaphus several spp. undt. 
Cornulites sp. undt. Megalas pis minor Weller 
Gastropod (gen. and sp. undt.) Proetus sp. undt. 
Vaginoceras sp. undt. 
DESCRIPTIONS OF SPECIES FROM THE KI-SIN-LING LIMESTONE. 
Lingula ? sp. undt. 
A single imperfect specimen of a small inarticulate brachiopod may be referred 
provisionally to the genus Lingula. It is shorter and rounder than usual for the 
members of that genus, and if its characters could be accurately determined it might 
be referred elsewhere. 
Strophomena sp. undt. (plate 25, figs. 1, 2). 
The specimens of this species are somewhat common in this collection, but all are 
poorly preserved. They can not be definitely identified with any of the described 
species, but are somewhat closely allied to such forms as S. incurvata (Shepard) 
from the Mohawkian faunas of North America. One of the most complete speci- 
mens, a brachial valve, has a lengthof 14 mm., a width of 20 mm., and a convexity of 
3.5mm. A few other individuals were somewhat larger, but the dimensions given 
seem to indicate about the average size, which is smaller than is usual among the 
allied American species. The surface of the shells is marked by fine radiating coste 
which, in specimens not too much exfoliated, are variable in size, from two to six 
finer costz lying between the coarser ones; the surface isalsomarked by finer concen- 
tric lines, as in the American S. incurvatus. The greatest convexity of the brachial 
valve is anterior to the middle, and the cardinal extremities are compressed. The 
outlines of different individuals vary somewhat, and it is possible that more than 
one species is present in the fauna. 
Triplecia poloi (Martelli) (plate 25, figs. 7-9). 
1901. Schizophoria poloi Martelli, Boll. della Soc. Geol. Ital., vol. xx, p. 302, plate 4, figs. 17-22. 
1901. Porambonites intercedens Martelli (not Pander), Idem, vol. xx, p. 304, plate 4, figs. 13-16. 
