310 RESEARCH IN CHINA. 
sp. the characters appear to be incompatible with the Rhynchonellide and are more 
suggestive of the orthids. If these little shells could be obtained whole and unex- 
foliated it would doubtless be possible to determine their specific and generic rela- 
tions. The treatment of them in this instance does not satisfy me, and doubtless 
will prove unsatisfactory to others. 
This form shows little resemblance to any of the Carboniferous species obtained 
from China by von Richthofen, but it is rather strikingly similar to two Silurian 
ones from the mountains of Tshau-tién. One of these Kayser identifies as 
Rhynchonella sp.' and the other, with which the resemblance is especially close, he 
describes as a new species under the title Atrypa ? tschautienensis.” 
While in this, as in other cases, it is impossible not to attach significance to 
these specific resemblances, they may, since even the generic position of the present 
forms is a matter of uncertainty, prove entirely illusory. 
Locality and Horizon.—Pre-Pennsylvanian (?); near Ta-miau-ssi, East Ssi- 
ch’uan (stations 6, 8, and 9). 
Proetus ? sp. 
This form is represented merely by a free cheek. Although in our specimen 
the facial outline of the suture is broken or obscure, there is little doubt that it is 
one of the Proetide; but further than this it would hardly be safe to go. The 
length of the genal spine is unusual. 
Locality and Horizon.—Pre-Pennsylvanian (?); near Ta-miau-ssi, East Ssi- 
ch’uan (station 6). 
PENNSYLVANIAN SPECIES. 
Clavulina ? sp. 
In the cherts of station 9 (Shan-tung) are several molds of a small organic body 
which appears to have been a foraminifer related to Clavulina. ‘The general shape 
is nodose-cylindrical or nodose-conical, the length being from 2 to 2.5 mm. 
The most complete example retains the internal molds of some of the chambers, 
which are seen to have had the shape of disks with rounded edges. ‘The lower part 
of this specimen is inflated and conical, and consists of probably two alternating 
series with about five chambers in each. ‘The upper part is in a single series and 
includes but three chambers. The general appearance therefore resembles the 
genera Clavulina and Dimorphina. 
Another specimen, somewhat longer and much more slender, has a length of 
about 2.5 mm. and a diameter of 0.5 mm. One end is terminated by a large cell 
which appears to have been spherical. The other end appears to have been some- 
what swollen and conical, and was perhaps constructed like the corresponding part 
of the foregoing. ‘Though the number and arrangement of cells can not be made 
out, there are perhaps seven chambers above the cone, the last of which, as already 
remarked, is spherical and larger than the rest. The surface is entirely without 
ornamentation, so far as can be made out. 
The generic position of this type is undeterminable from the material at hand, 
but its presence in the fauna is too important to be passed over entirely without 
description or comment. 
Locality and horizon.—Pennsylvanian; near Ts’ai-kia-chuang, Shan-tung (sta- 
tion 59). 

'Richthofen’s China, vol. 4, 1883, plate 4, figs. 3-3¢. 
*Idem, p. 47, plate 4, figs. 12, 12a-d. 
