. Bulletin - United States National Museum. Science. 52 BULLETIN 65, UNITED STATES NATIONAL MUSEUM. long), each ending in ilicliotonious froe points. Texture corneous, with a sur- face apparently composed of scaly fibers. Of this species the fossils are not very well preserveil. There is some indica- tion of a central axis. This species is distinguished from /. plumulosus by the close, regularly arranged, parallel branches from each side of the princi- \y,\] stipes and by their terminal branches. The fronds appear to have grown in groups, but whether they are connected at the base or n
. Bulletin - United States National Museum. Science. 52 BULLETIN 65, UNITED STATES NATIONAL MUSEUM. long), each ending in ilicliotonious froe points. Texture corneous, with a sur- face apparently composed of scaly fibers. Of this species the fossils are not very well preserveil. There is some indica- tion of a central axis. This species is distinguished from /. plumulosus by the close, regularly arranged, parallel branches from each side of the princi- \y,\] stipes and by their terminal branches. The fronds appear to have grown in groups, but whether they are connected at the base or not is unknown. If not connected, the individual fronds (in the specimens under consideration) are about 4 cm. high and 3 broad, with from 3 to 5 principal branches on either side of the central stipe (the branches are more numerous on one side than the other). The character of the cellules is unknown. Formation and localiti/.—Inocaiilis i)hucoi(1cs occurs in the dolomitic lime- stones of the Niagara formation at the " Jolly-cut" quarries, Hamilton, Ontario. A specimen doubtfully referred to this species occurs in the Na- tional Museum collections. l)ut shoAvs nothins: in addition to the above. INOCAULIS DIFFUSUS Spencer. Inocaulis diffufia Spencer, Canadian Nat., X, 1SS2, p. 165, nomen nudum. Inocaulis diffusus Spencer, Trans. Acad. Sci. St. Louis, IV, 1884, pp. 565, 586, 587, pi. 5, fig. 4; Bull. Mus. Univ. State Missouri, I, 1884, pp. 15, 36, 37, pi. 5, fig. 4.—GuRLEY, Joum. Geol., I^', 1896, pp. 99, 308. This species was described by Spencer as follows: Frond originating in a single stiiie at base, and rising above in numerous widely extended branches averaging about a millimeter in breadth, with dicho- tomous terminations ; branchlets origi- nating more frequently on one side than on the other. Texture corneous, with surface more or less i-egularly striated, leaving in some places small oval impressions (pi'obably the ori- fices of the cellules). Of this speci
Size: 1310px × 1908px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
