XVI 
INDEX. 
Aviculopecten ignotus, Hall, . 
A. insignis, Hall, 
A. Itys, Hall, 
A. lautus, Hall, 
A. mucronatus, Hall, 
A. orbicularis, McCoy, 
A. orbiculatus, McCoy, . 
A. Orestes, Hall, 
A. ornatus, Hall, . 
A. patulus, Hall, 
A. pecteniformis, ( Conrad ) Hall, 
A. Phorcus, 
A. plenus, Hall, 
A. princeps, ( Conrad) Hall, . 1, 5 
A. repletus, Hall, . 
A. rugabstriatus, Hall, 
A. Sanduskyensis, (Meek) Hall, 
A. scabridus, Hall, . . .3 
A. signatus, Hall, . 
A. squama, Hall, 
A. striatus, Hall, . 
A. sub-cancellatus, Hall, 
A. tenuis, Hall, 
A. undulatus, Hall, . 
A. undulatus, McCoy, 
A. Winclielli, Meek, . 
A. (Orenipecten ?) incultus, Hall, 
A. (Pterinopecten ?) invalidus, Hall, 
A. (P. ? ) terminalis, Hall 
Byssopteria, Hall, 
B. radiata, Hall, . 
Crenipecten, Hall, 
C. amplus, Hall, . 
C. creuulatus, Hall, . 
C. glaber, Hall, 
C. impolitus, Hall, 
C. Leon, Hall, 
C. liratus, Hall, 
C. micropterus, Hall, . . 
C. obsoletus, Hall, . 
C. Winchelli, (Meek) Hall, 
C. ( Pecten) Winclielli, (Meek) Hall, 
Ectenodesma, Hall, . 
E. birostratum, Hall, . 
Entoeium, Meek, 
Glyptodesma, Hall, 
G. erectum, ( Conrad ) Hall, 
G. erectum var. obliquum, Hall, . 
G. occidentale, Hall, 
Gosseeettxa, Barrois, 
G. retusa, Hall, 
G. triquetra, ( Conrad ) Hall, 
Inoceramus Chemungensis, Conrad, . 
I. oviformis, Conrad, 
Janira longicauda, (D'Orbigny), 
Leiopteria, Hall, .... 
L. Bigsbyi, Hall, . 
L. Chemungensis, ( Vanuxem) Hall, 
L. Conradi, Hall, . 
L. Dekayi, Hall, 
L. Gabbi, Hall, 
L. Greeni, Hall, 
L. laevis, Hall, . . . 
L. Leai, Hall, .... 
Leiopteria linguiformis, Hall 
Mitcbelli, Hall, 
nitida, Hall, 
Oweni, Hall, 
Rafinesquii, Halt, 
Torreyi, Hall, 
Troosti, Hall, 
Leptodesma, Hall, 
acutirostrum, Hall 
Agassizi, Hall, . 
alatum, Hall, 
aliforme, Hall, . 
arciforme, Hall, 
aviforme, Hall, 
Beoki, Hall, 
Billingsi, Hall, 
Biton, Hall, 
Sayi, 
r all, 
Cadm 
Hall, . 
Clitus, Hall, 
complanatum, Hall, 
Corydon, Hall, 
Crec 
Hall, 
curvatum, Hall, 
Demus, Hall, 
disparile, Hall, 
extenuatum, Hall, 
fiaccidum, Hall, 
Hector, Hall, . 
Jason, Hall, 
lepidum, Hall, . 
Lesleyi, Hall, 
Lichas, Hall, . 
longispinum, Hall 
Loxias, Hall, . 
Lysander, Hall, 
Maclurii, Hall, . 
Marcellense, Hall, 
Mathcri, Hall, . 
Medon, Hall, 
Mentor, Hall, . 
Mortoni, Hall, 
mytiliforme, Hall, 
naviforme, Hall, 
Nereus, Hall, . 
Orcus, Hall, 
Orodes, Hall, . 
Orus, Hall, . 
patulum, Hall, . 
Pelops, Hall, 
Pliaon, Hall, . 
potens, Hall, 
potens var. juvens 
propinqum, Hall, 
protextum, (Conrad) Hall, 
quadratum, Hall, 
robustum, Hall, . 
Rogersi, Hall, 
rude, Hall, 
Shumardi, Hall, 
sociale, Hall, . 
spinigerum, ( Conrad ) Hall, 
Stephani, Hall, 
truncatum, Hall, . 
Hall, 
210 , 211 , 214 
235 
196 , 209 
206, 214, 223 
