. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 12. Diacanihaspis ulrichi A, B, C, D, crauidia of increasing size, exterior views, right free c-heek shown in D. Approximately ^ 38. Drawn from the originals of Plate 8, figures 10, 14, 15, 16, 28 respectively. Paired spines numbered and lettered as in Text-figure 1. in front of the occipital furrow. At this stage the cranidium is quite like that of D. cooperi (AYhittington, 1941, text-fig. 2) and D. secret us (PI. 6, fig. 12; Text-fig. IID^, but the large median occipital tubercle and fewer and shorter p
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 12. Diacanihaspis ulrichi A, B, C, D, crauidia of increasing size, exterior views, right free c-heek shown in D. Approximately ^ 38. Drawn from the originals of Plate 8, figures 10, 14, 15, 16, 28 respectively. Paired spines numbered and lettered as in Text-figure 1. in front of the occipital furrow. At this stage the cranidium is quite like that of D. cooperi (AYhittington, 1941, text-fig. 2) and D. secret us (PI. 6, fig. 12; Text-fig. IID^, but the large median occipital tubercle and fewer and shorter paired spines on fixed cheeks and borders are distinctive. The later develop- ment parallels that of other species, except that beyond a length (sag.) of about mm. the sj'uimetrical arrangement of spines on the glabplla in front of the occipital ring is 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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