. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. ed with the heads, cheeks and pygidia of this species. ** 17- A pygidium of the same species. DiKELOCEPHALUS 18. The head, twice ;« 19. A cheek, natural size : found in the same stone. Chariocephalus 20. A head restored from actual specimens of the glabella and cheeks. Ptychaspis miniscaensis. /i^: Fig. 21. A head restored from actual specimens of the separate gl
. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. ed with the heads, cheeks and pygidia of this species. ** 17- A pygidium of the same species. DiKELOCEPHALUS 18. The head, twice ;« 19. A cheek, natural size : found in the same stone. Chariocephalus 20. A head restored from actual specimens of the glabella and cheeks. Ptychaspis miniscaensis. /i^: Fig. 21. A head restored from actual specimens of the separate glabella and movablecheeks. The cheeks appear narrower than when given separately; as theyare shown in perspective, to correspond with the convexity of the head. «? 22. A thoracic segment : the righthand extremity is restored, to correspond withthe actual portion on the left. Agnostus 23. A head, three times enlarged.«• 24. A pygidium, enlarged in equal degree. • Agnostus disparilis. Fio. 25. A head, four times enlarged.«« 26. The pygidium? of this species, four times enlarged.«< 27. A pygidium showing transverse furrows, equally enlarged. i Pill. \^itf£ell,ael. S-wiaboxi, EXPLANATION OF PLATES. 207 PLATE XI. DiKELOCEPHALUS MINNESOTENSIS. /j8 Fig. 1. The hypostoma of this species.«« 3. A cheek of the same.«< 4. A pygidium of the same. Fia. 2. A cheek of D. pepinensis? Fig. 5 & G. Spines of an undetermined trilobite, referred by Dr. D. D. Owen toLonchocephalus hamulus. Aglaspis barrandi. Fig. 7. A large carapace of this species. <» 8. A smaller carapace. «« 9. The lower side of a part of a small carapace, showing the cavities of the eyes. «* 10. Enlargement of the surface. *< 11, A portion of the crust, which may have been of a segment at the posteriorpart of the body. «< 12, 13, 14. Fragments which appear to be the extremities of thoracic segments.•« 15, 16. Spines corresponding in character to the crust
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
