. Bulletins of American paleontology. Alaskan ammonites, Pt. II: Westermann 159 50 20 ph ragm body ch p. argentinus A A P transatlanticus • o P singulans ® ® P sphoeroceroides ? 0 holotype H. D (mm) Text-fig. 53. — Scatter with growth lines for relative whorl width ('thick- ness' := W:D) of Pseuduioitcs spp. from South America (No. 2: "Emilria aff. s'lngularis ; ^= P. cf. transatlanticus) and Wide Bay (serrated lines). Note that the growth rate decreases throughout the phragmocone and body chamber and that separation of species is poor. extensions of the bullae or nodes. There ar
. Bulletins of American paleontology. Alaskan ammonites, Pt. II: Westermann 159 50 20 ph ragm body ch p. argentinus A A P transatlanticus • o P singulans ® ® P sphoeroceroides ? 0 holotype H. D (mm) Text-fig. 53. — Scatter with growth lines for relative whorl width ('thick- ness' := W:D) of Pseuduioitcs spp. from South America (No. 2: "Emilria aff. s'lngularis ; ^= P. cf. transatlanticus) and Wide Bay (serrated lines). Note that the growth rate decreases throughout the phragmocone and body chamber and that separation of species is poor. extensions of the bullae or nodes. There are about foiu- to five times as many fine and blunt secondaries (35-50 per halfwhorl on inner whorls, 45-55 per halfwhorl on outer whorls) which are born from the nodes or bullae by intercalation and cross the externside more or less strongly convex, sometimes with median flattening; they become extremely dense and finally obsolete on the last whorl, including the body chamber. Some blunt, faint and more distant ribs may be developed toward the end of the body 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 Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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