. Bulletins of American paleontology. New Guinea Ammonites: Westermann & Getty 251 beginning of the ultimate wiiorl. However, the holotype becomes less inflated than our specimen; the secondaries become j;)roso- radiate only on the ultimate one-half whorl and ventral straight- ening is only faintly suggested. However, this may be partly due to the somewhat smaller size. The ventral costal features of our specimen are imknown from any other Stephanoceras and may be characteristic of fully grown S. etheridgei, together with the remarkable change of whorl section. The secondaries are als
. Bulletins of American paleontology. New Guinea Ammonites: Westermann & Getty 251 beginning of the ultimate wiiorl. However, the holotype becomes less inflated than our specimen; the secondaries become j;)roso- radiate only on the ultimate one-half whorl and ventral straight- ening is only faintly suggested. However, this may be partly due to the somewhat smaller size. The ventral costal features of our specimen are imknown from any other Stephanoceras and may be characteristic of fully grown S. etheridgei, together with the remarkable change of whorl section. The secondaries are also stronger than in most species of 5. (Stemmatoceras) under which name it is kept with modest con- fidence. Nevertheless, there is some resemblance to the new genus Irianites in the change of whorl section and the unusual secondaries, so that this specimen was originally classified with the much more abundant form. The West Irian specimens identified by Donovan (iyi Visser and Hermes, 1962) as Stephanoceras (Teloceras) aff. S. indicum (Kruizinga) and 5. brodiaei (J. Sowerby), which were reinvesti- gated and partly further developed from the matrix, are probably identical with this species. "Coeloceras" indicum Kruizinga [? nomen dubium] (1926), the poorly preserved holotype of which. 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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