REPORT ON UPPER PALEOZOIC FOSSILS FROM CHINA. 305 



PRE-PENNSYLVANIAN (?) SPECIES. 

 Fistulipora willisiana Girty. 



Plate 28, Figures i, 2. 

 Fistulipora willisiana GIRTY, 1907, Proc. U. S. Nat. Mus., vol. xxxm, p. 41. 



This species grows in thin epithecate expansions, occurring in considerable 

 numbers in the limestone of which it appears to constitute a paleontologic feature 

 of some importance. The largest fragment seen measures 15 mm., but the original 

 size may have been considerably greater. The thickness of the typical specimen 

 is but little over 0.5 mm. The growth is irregular and contorted. Maculae are 

 present, but their size and distribution have not been determined. The zooecia 

 are quite small; they occur six or seven in a distance of 2 mm., and are situated 

 at intervals of about one or two times their own diameter. A lunarium is well 

 developed. Mesopores are usually large and as a rule separate the zooecia in single 

 rows. They are about the size of the zooecia themselves, and in some cases are 

 even larger. 



This species is distinguished by its thin lamellate growth and by the small size 

 of the zooecial tubes. 



Locality and Horizon. Pre-Pennsylvanian (?); near Ta-miau-ssi, East Ssi- 

 ch'uan (stations 6, 8, and 9). 



Fistulipora sp. 



Associated with the foregoing is another more massive species. The structure 

 has, unfortunately, become so obscure in process of fossilization that it can not be 

 studied by means of thin sections. One colony is 8 mm. thick, and, being fragmen- 

 tary, measures 12 mm. across. 



Locality and Horizon. Pre-Pennsylvanian (?); near Ta-miau-ssi, East Ssi- 

 ch'uan (stations 6 and 9). 



Leioclema sp. 



This title is employed for a small, cylindrical, possibly branching bryozoan 

 which occurs in some abundance at stations 6 and 8. The usual diameter is from 

 2.5 to 3 mm. In the course of fossilization the microscopic structure has been much 

 obscured, so that an accurate determination of the genus is no longer possible. So 

 far as can be made out, however, it seems to belong to Leioclema and to be related 

 to the American species punctatum. 



Locality and Horizon. Pre-Pennsylvanian (?); near Ta-miau-ssi, East Ssi- 

 ch'uan (stations 6 and 8). 



Taeniodictya ? sp. 



Of this species our collection affords a mere fragment, the length of which is 

 about 10 mm. and the width, representing about the true dimensions, in the neigh- 

 borhood of 2 mm. The growth indicated is a parallel-sided frond having a section 

 of compressed elliptical shape. The cells are very small and slightly oval in outline, 

 the long diameter being parallel to the axis. There are about ten longitudinal rows, 

 which are arranged in alternation, so that the apertures are placed quincuncially. 

 The distance between two apertures in diagonal or transverse rows is about the 

 same, approximately equal to an apertural diameter, and it is considerably less than 

 that between two apertures in the same row longitudinally. The interapertural 

 spaces appear to be ornamented with many little raised points. 



