. College collection of palaeontology. No. 374. Atrypa reticularis, Linu. Devonian, Eifel, Prussia. No. 375. Atrypa reticularis, Linn. Unusually large specimens, from the Corniferous, at Charleston, Indiana. No. 376. Zygospira modesta, Say. This genus differs from Atrypa only in the minute character of the spiral arm-supports. Cincinnati Group, Waynesville, Ohio. FAMILY SPIRIFERID^. Shell furnished internally with two spiral processes directed outwards, to- ward the sides of the shell, to support the fixed oval arms. Extinct since the Lias. No. 377. Spirifer micropter. In this genus the shell
. College collection of palaeontology. No. 374. Atrypa reticularis, Linu. Devonian, Eifel, Prussia. No. 375. Atrypa reticularis, Linn. Unusually large specimens, from the Corniferous, at Charleston, Indiana. No. 376. Zygospira modesta, Say. This genus differs from Atrypa only in the minute character of the spiral arm-supports. Cincinnati Group, Waynesville, Ohio. FAMILY SPIRIFERID^. Shell furnished internally with two spiral processes directed outwards, to- ward the sides of the shell, to support the fixed oval arms. Extinct since the Lias. No. 377. Spirifer micropter. In this genus the shell is transversely oval or elongated, trilobed, beaked, bi-convex; hinge-line wide and straight; foramen angular; 300 species are dis- tributed from the Lower Silurian to the Trias. Devonian, Gerolstein, Prussia. No. 378. Spirifer mucronata, [Con. Hamilton Group, Widder, No- 379. Spirifer Owenii, Hall. Corniferous, Charleston, Indiana. No. 380. [690, Cast]. Spirifer pinguis, [Sow. From the Carboniferous Limestone of Kildare, near Dublin, Ireland, and now in the "Ward Collection of the University of Rochester. No. 381. Spirifer speciosus, Schloth. Devonian, Gerolstein, 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 Ward's Natural Science Establishment, inc. Rochester
Size: 2612px × 957px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1900, bookyear1901
