xviii 
INDEX. 
Pterinopecten insons, Hall, 
intermedius, Hall, 
invalidus, Hall, 
laetus, Hall, 
lautus, Hall, 
multiradiatus, Hall, 
N eptunus, Hall, 
nodosus, Hall, . 
reflexus, Hall, 
regularis, Hall, 
spondylus, Hall, . 
strictus, Hall, . 
suborbicularis, Hall, 
terminalis, Hall, 
undosus, Hall, 
Vertumnus, Hall, 
(Aviculopeoten ?) strictus 
Ptychopteria, Hall, . 
alata, Hall, . 
Beecheri, Hall, 
elongata, Hall, 
Eucrate, Hall, . 
63 , 65, 66, 67, 75, 107 
44 , 58, 77, 78, 80 
. 139 , 141, 144 
. 143 
141 , 143 
133 , 137, 138,142, 143 
Ptychopteria Eudora, Hall, 
P. expansa, Hall, .... 
P. falcata, Hall, .... 
P. Galene, Hall, .... 
P. gibbosa, Hall, .... 
P. lata, Hall, .... 
P. lobata, Hall, .... 
P. perlata, Hall, .... 
P. Proto, Hall . 
P. Salamanca, Hall, 
P. Sao, Hall, . . 133 , 134, 135, 
P. sinuosa, Hall, .... 
P. spatulata, Hall, .... 
P. Spio, Hall, .... 
P. Thalia, Hall, .... 
P. Thetis, Hall . 
P. trigonalis, Hall, .... 
P. Vanuxemi, Hall, 
Sanguixolites, McCoy, .... 
SOGEN, L. . . . . 
Spirifera Verneuili, Murchison, . . 131, 
Veiitumnia., Hall, .... 
