70 
AUG. F. FOERSTE 
have been studied by Dr. Rudolph Ruedemann/^ and have been 
referred by him to the genus Inocaulis. Figure 4 on plate 4 of 
his account shows in striking manner the black dots on the sur- 
face of the frond, evidently serving as points of support of the 
hair-like fibers which evidently cover the entire surface of the 
frond, but which are seen best where projecting beyond its 
margins. According to Dr. Ruedemann the surface of the frond- 
like growth is covered with fine tubercles in some places and 
with fine pores in others. The tubercles are the casts of the 
pores, so that the entire surface of the organism appears covered 
with pores. The pores terminate in fine straight tubes having 
the dimensions of fibers, more or less perpendicular to the sur- 
face of the frond. Of the circular pores 5 occur in a length of 1 
mm. The width of the hair-like tubes is 0.05 mm. The original 
form of the branches of the frond is regarded as having been 
cylindrical in form. Such fibers as appear within the fronds 
appear twisted together irregularly, rather than forming reticu- 
lating meshes. The structure is regarded as graptolitic, allied 
to Inocaulis, Palaeodictyota, Acanthograptus, and the like. The 
possibility of the fibers being chitinous, rather than carbonaceous, 
is indicated. 
It is evident that Leveilleites presents structures suggestive 
of the Kokomo and Buffalo forms formerly referred to Butho- 
trephis. There is a possibility of their being of animal, rather 
than of vegetable origin. As to their affinities to the Dendro- 
graptidae among the Dendroidea order of the graptolites, the 
present writer is in no position to express any opinion, not being 
sufficiently familiar with the latter. 
Buthotrephis creditensis Sp. nov. 
Plate XV A, figs. 15 A, B ^ 
Flat fronds, known only from fragments 65 mm. long and 30 
to 35 mm. wide; originally probably similar in size and shape to 
Ruedemann, Rudolph, Account of some new little-known species of fossils, 
mostly from the Paleozoic rocks of New York: N. Y. State Mus. Bull. 189, 1916, 
})p. 13-17, text fig. 4 and pi. 4, figs. 1-4. 
