. Annual report. New York State Museum; Science; Science. 294 NEW YORK STATE MUSEUM Dicellograptus cf. complanatus Lapworth Plate 18, figure i Dicellograptus complanatus Lapworth. Ann. & Mag. Nat. Hist. Ser. 5, v. 5. 1880. ; pi. 5, fig. iya-e Dicellograptus complanatus Tullberg. Sver. Geol. Unders. Afh. och Upps. Ser. C, no. 50. 1882. Dicellograptus complanatus Roemer & Freeh. Lethaea Palaeozoica. 1897. 1:618, fig. 183 Dicellograptus complanatus Lapworth, Elles & Wood. Monogr. Brit. Grapt. (in Pal. Soc. 1904). ; pi. 20, fig. ia-d A small series of graptolites collect
. Annual report. New York State Museum; Science; Science. 294 NEW YORK STATE MUSEUM Dicellograptus cf. complanatus Lapworth Plate 18, figure i Dicellograptus complanatus Lapworth. Ann. & Mag. Nat. Hist. Ser. 5, v. 5. 1880. ; pi. 5, fig. iya-e Dicellograptus complanatus Tullberg. Sver. Geol. Unders. Afh. och Upps. Ser. C, no. 50. 1882. Dicellograptus complanatus Roemer & Freeh. Lethaea Palaeozoica. 1897. 1:618, fig. 183 Dicellograptus complanatus Lapworth, Elles & Wood. Monogr. Brit. Grapt. (in Pal. Soc. 1904). ; pi. 20, fig. ia-d A small series of graptolites collected by Dr Ulrich in dark brown limestone (Sylvan shale), said to lie above the Richmond beds, in the Arbuckle mountains in Indian Territory, contains two proxi- mal parts of rhabdo- somes of a Dicello- graptus which can not be positively identified since the rhabdosomes are but fragmentary, but which by their habit remind of D. complanatus and of D. forchammeri, especially the former. The rhabdosome possesses the same wide axil, the same angle of divergence (2700), like gently outward curvature of the branches and width of their proximal parts (.5 mm). The sicula is in both specimens incompletely preserved, a peculiarity mentioned also of complanatus; the first thecae are nearly horizontal and bearing short, blunt, lateral spines. Also some of the next thecae are provided with mesial spines. The thecae appear to be, in their characters, entirely like those of D. complanatus. They number 10 in 10 mm, are long and slender (2 mm long), overlapping not quite one. half their length, with straight or but slightly convex ventral. Fig. 208, 209 Dicellograptuscf. complanatus Lapworth. Enlargements (x 5) of two fragmentary rhabdosomes. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum. Albany : Univ
Size: 2095px × 1193px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
