vi List of Plates. 



XXXIII. Figs. 1-2. Iheringichthys labrosus. Dentition of Serrasahno 



humeralis. See explanation, p. 156. 



XXXIV. Figs. 1-3. He7iiidoras Paraguay ensis. Homodiatus anisitsi. 



See explanation, p. 15C 

 XXV. Figs. 1-3. Hemiodonticfithys acipenserinus. Loricaria typus. 

 See explanation, p. 156. 

 XXXVI. Figs. 1-3. Sturisoma robusta. See explanation, p. 156. 

 XXXVII. Figs. 1-4. Loricaria carinata. Loricaria labialis. See ex- 

 planation, p. 156. 

 XXXVIII. Figs. 1-4. Otocinclus vittatus. Corydoras microps. Cory- 

 dor as aur of renatus. See explanation, p. 157. 

 XXXIX. Figs. 1-3. Parodon Paraguay ensis. Schizodo?iborelli. Aphy- 

 ocharax dentatus. See explanation, p. 157. 

 XL. Figs. 1-3. Tetragonopterus argefiteus. Tetragonopterus alleni. 



Astyanax pelegrini. See explanation, p. 157. 



XLI. Figs. 1-3. Mcenkhausia dichrourus. Mooikhausia agassizi. 



Deuterodon iguape. See explanation, p. 157. 



XLI I. Figs. 1-2. Metywiis viola. Myleus levis. See explanation, 



p. 157. 

 XLIV. Figs. 1-2. Chcetobranchopsis australe. sEquidens paraguay- 

 ensis. See explanation, p. 157. 

 XLV. Figs. 1-3. Mcsonauta festivus. Heterogramma Corumbce. 



See explanation, p. 157. 

 XLVI. Gastropods from the Chazy Formation. See explanation, p. 221. 

 XLVII. Gastropods from the Chazy Formation. See explanation, p. 221. 

 XLVIII. Gastropods from the Chazy Formation. See explanation, pp. 

 221-222. 

 XLIX. Gastropods from the Chazy Formation. See explanation, pp. 

 222-223. 

 L. Gastropods from the Chazy Formation. See explanation, p. 223. 

 LI. Gastropods from the Chazy Formation. See explanation, p. 223. 

 LII. Gastropods from the Chazy Formation. See explanation, p. 223. 

 LIII. Gastropods from the Chazy Formation. See explanation, p. 223. 

 LIV. Gastropods from the Chazy Formation. See explanation, p. 224. 

 LV. Gastropods from the Chazy Formation. See explanation, pp. 



224-225. 

 LVI. Wynnea Americana Thaxter. 

 LVII. View of Cave at Frankstown, Pa. 

 LVIII. View of Cave at Frankstown, Pa. 

 LIX. Reptilian Remains Found Near Pittsburgh, Pennsylvania. See 



explanation, p. 240. 

 LX. Trilohites from the Black River Formation. See explanation, 

 pp. 254-255. 



