. Bulletin. Natural history; Natuurlijke historie. TAXONOMY 33 10 ^ 7 HEPTODON M, B. o 10 12 14 Length Mp ,mm. Fig. 6. Scatter diagram of length-width measurements of Lostcabinian Wind River Basin Hepto- don M„'s with 95% and 99% equiprobability elHpse axes calculated for the calciculus- ventorum group (=: H. calciculus). Solid circles ^ named types: C =z H. calciculus, V = H. ventorum, B == H. brownorum, P =z H. posticus. lapping samples, due to temporal or spatial separation, have been used by other workers (see inter alia Kitts, 1956, p. 35, Gazin, 1962, p. 79) to distinguish subspecies. Su
. Bulletin. Natural history; Natuurlijke historie. TAXONOMY 33 10 ^ 7 HEPTODON M, B. o 10 12 14 Length Mp ,mm. Fig. 6. Scatter diagram of length-width measurements of Lostcabinian Wind River Basin Hepto- don M„'s with 95% and 99% equiprobability elHpse axes calculated for the calciculus- ventorum group (=: H. calciculus). Solid circles ^ named types: C =z H. calciculus, V = H. ventorum, B == H. brownorum, P =z H. posticus. lapping samples, due to temporal or spatial separation, have been used by other workers (see inter alia Kitts, 1956, p. 35, Gazin, 1962, p. 79) to distinguish subspecies. Subspecific names or trinomials have not been applied in the present revision for reasons discussed in the introduction. Even if one preferred to use these somewhat dubious categories, Heptodon samples are not large enough to permit adequate statistical comparisons. Col- lections of Heptodon from other than type localities were referred to H. calciculus if they fell within the 99 per cent ellipse size limits of that species, or, if most of the specimens wrere larger, assigned to H. posticus. This somewhat arbitrary method of specific assign- ment seemed the only practical way to treat taxonomically such inadequate samples. No specimens differed enough to warrant recognition of a third species. The suggested specific taxonomy of Heptodon is as follows. Heptodon calciculus (Cope) 1880 Plate 2, figs. 1, 6 Lophiodon calciculus Cope, 1880, p. 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 Peabody Museum of Natural History. New Haven : The Museum
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