PLATE XVI: 
GLyPropomus Sayrel, Newb. (p. 116). 
Fic. 1. Head and anterior portion of body, under side, showing two jugular plates and four lateral 
jugulars ; also lobate pectoral fins. On the same slab are seen portions of two other indi- 
viduals of the same species. Half natural size. 
Catskill group, Susquehanna River, near mouth of Mehopany. 
BOTHRIOLEPIS Lrrpy1, Newb. (p. 111). 
2. Portion of anterior lateral body plate, outside, natural size. 
Catskill group, Mansfield, Tioga County, Pa. 
Heiopus Lesteyi, Newb. (p. 86). 
3. Upper dental plate. 
Chemung rocks, northern Pennsylvania. 
GYRACANTHUS SHERWOODI, Newb. (p. 119). 
4. Denuded spine, natural size. 
4°. Portion of side, showing ornamentation. 
4>. Section. 
Green Catskill Sandstone, Lamb’s Creek, Tioga County, Pa. 
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