. 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. GONIATITES DISC0IDET7S. Pig. 3. A young individual, showing form of shell and direction of septa. Fig. 4. Diagram of septa. Fig. 5. A larger and nearly full-grown individual. Fig. 6. Diagram of septa, showing a greater sinuosity in the older specimens. GONIATITES UNIANGULARIS. G. uniangularis : Conrad, Jour. Acad. Nat. Sci. Phila, Vol. viil, pa. 268, pi. 16. fig. 4. 6 (bis). This is a small species, sho
. 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. GONIATITES DISC0IDET7S. Pig. 3. A young individual, showing form of shell and direction of septa. Fig. 4. Diagram of septa. Fig. 5. A larger and nearly full-grown individual. Fig. 6. Diagram of septa, showing a greater sinuosity in the older specimens. GONIATITES UNIANGULARIS. G. uniangularis : Conrad, Jour. Acad. Nat. Sci. Phila, Vol. viil, pa. 268, pi. 16. fig. 4. 6 (bis). This is a small species, showing an increased sinuosity in thesepta, a small dorsal lobe, with shallow dorsal saddle and adefined dorso-lateral lobe. A larger specimen shows more sinuoussepta. The figure gives the form and proportions, with the directionof the septa in the original of Mr. Conrads description. Geological formation and locality. In the shales of the Ha-milton group : at Moscow and Patersons creek, Livingston co. GONIATITES GONIATITES MITHRAX ( ). This species is discoid and but moderatelygibbous in the middle of the volutions, andregularly curving towards the back. There isnp perceptible umbilicus, the interior volutionsbeing entirely included. It has twice the dia-meter of the figure, and the last chamber andthe aperture are unknown. Its similarity toG. uniangularis, in the direction of the septa,is remarkable; but that species is proportion-ally more expanded towards the ventral sideof the volutions, and a little flattened on thesides towards the back. The outer volution inthat one is not so deepl}^ occupied by the pre-ceding ones, and the aperture is more elongated. Geological formation and localittj. In limestone of the age of the Upper Hcl-derberg limestone, near Columbus (Ohio), received from Dr. Mann. The noticeand illustration of this spedcs are introduced here, for the purpose of comparisonwith those of the Hamilton group.
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
