PLATE I. 
Calymene platys. 
Page 1. 
See Plate 25. 
Fig. 1. An imperfect specimen wanting the posterior xiortion of the body, but jireserving the movable 
cheeks in jdace. 
Schoharie grit. Schoharie county. 
Fig. 2. A nearly entire individual somewhat below the average size ; di'awn from an imjiression of a 
natural movdd of the dorsal sui-face. The obscure third x>air of glabellar lobes are distinctly 
seen in the sjiecimen but do not aji^ieai’ in the di'awing. The sjoecimen belongs to the cabinet 
of the Albany Institute and is the original of Dr. Green’s descrix)tion. 
Schoharie grit. Albany county. 
Fig. 3. An individual with a portion of the cejihalon removed, showing the hyjiostoma in its normal 
Xwsition. 
Schohai-ie grit. Schohane county. 
Fig-. 4. A very large, nearly entire examjile, retaining only a small portion of the crust. The third 
glabellar lobes do not aj)pear in the drawing. 
Schoharie gi-it. Schoharie county. 
Fig. 5. A large individual retaining most of the crust ux)on the thorax. 
Schoharie gi-it. Schoharie county. 
Fig. 6. The glabella and fixed cheeks of a large individual jn-eserved as a cast of the lower surface. 
The first and third jiairs of glabellar lobes are not indicated in the di-awing. 
Schoharie grit. Knox, Albany county. 
Fig. 7. The hyx^ostoma. Drawn from an imxiression of the lower surface obtained from tig. 3, and 
restored upon the anterior margin. 
Fig. 8. The i)ygidium of a large individual drawn fi-om a cast of the lower surface and showing the im- 
Xn-ession of the doublure along the xiostei-ioi- inaj-gin. The annulations uxion the x^osterior iior- 
tion of the axis ai-e made to axix''ear too consx)icuous in the drawing. 
Schoharie grit. Schoharie county. 
Fig. 9. A smaller xiyg'idium. The x^osterior edge has been broken away in the siiecimen, leaving the 
outline less strongly emarginate than is normal. 
Schoharie grit. Schoharie county. 
Calymene Niagarensis. 
A nearly entire individual, showing the tii-st and inconspicuous third x^air of glabellar lobes. 
Introduced for comxiarison with Calymene platys. 
Niagara groux3. Waldron, Indiana. 
The under side of the cexihalon, showing the epistomal doublure and the hyx)Ostoma in place. 
Niagai-a group. Waldron, Indiana. 
An entire individual of average size. 
Nihgara group. Waldron, Indiana. 
The rinder side of the cephalon, showing the ux^x’©!' surface of the hyxiostoma. 
Niagara group. Waldron, Indiana. 
The hypostoma, enlarged to two diameters. 
Niagara group. Waldron, Indiana. 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
