LAMELLIBRANCHIA TA. 
539 
SUMMARY. 
No. of Species. 
NAME. 
Schoharie grit. 
Corniferous. 
Marcellus. 
Hamilton. 
Genesee. 
Portage. 
Chemung. 
Catslcill. 
! 
Waverly. 
I 
34 
Aviculopecten, .... 
5 
1 
12 
16 
1 
II 
13 
Lyriopecten, .... 
1 
1 
4 
7 
III 
22 
Pterinopecten, .... 
5 
3 
8 
7 
IV 
9 
Crenipecten, .... 
8 
1 
V 
12 
Pterinea, ..... 
3 
1 
10 
VI 
18 
Actinopteria, 
1 
2 
5 
10 
VII 
22 
Ptycliopteria, .... 
22 
VIII 
3 
Glyptodesma, 
1 
2 
IX 
15 
Leiopteria, .... 
1 
L 
n 
3 
X 
57 
Leptodesma, .... 
1 
i 
55 
XI 
3 
Pteronites,' .... 
3 
XII 
2 
Palaeopinna, .... 
1 
XIII 
1 
Ectenodesma, .... 
1 
XIV 
5 
Limoptera, .... 
1 
4 
XV 
i 
Byssopteria, .... 
1 
XVI 
15 
Mytilarca, .... 
2 
1 
2 
8 
2 
XVII 
2 
Gosselettia, .... 
2 
XVIII 
2 
Modiola, .... 
2 
XIX 
24 
Modiomorpha, .... 
3 
5 
1 
9 
7 
i 
XX 
13 
Goniophora, .... 
2 
7 
4 
XXI 
6 
Microdon, ..... 
1 
4 
2 
i 
XXII 
13 
Nucula, .... 
9 
5 
i 
XXIII 
4 
Nuculites, .... 
1 
4 
XXIV 
5 
Leda, ..... 
4 
i 
XXV 
20 
Palaeoneilo, .... 
1 
10 
i 
9 
3 
XXVI 
3 
Macrodon, .... 
1 
1 
1 
XXVII 
3 
Ptychodesma, .... 
1 
2 
XXVIII 
4 
N yassa, «■. 
1 
3 
. 
XXIX 
27 
Grammysia, .... 
1 
2 
15 
9 
2 
XXX 
1 
Euthydesma, 
i 
XXXI 
10 
Edmondia, .... 
7 
3 
XXXII 
15 
Sphenotus, .... 
5 
5 
6 
XXXIII 
2 
Spathella,. 
1 
1 
XXXIV 
13 
Conocardium, 
3 
3 
4 
2 
XXXV 
17 
Panenka, ..... 
1 
2 
6 
6 
i 
2 
XXXVI 
1 
Glyptocardia, 
1 
1 
i 
XXXVII 
1 
Praecai-dium, .... 
i 
XXXVIII 
1 
Paracardium, 
i 
XXXIX 
6 
Parai'ca, ..... 
i 
3 
2 
XL 
1 
Cai-diopsis, .... 
i 
XLI 
7 
Lunulicardium, 
5 
2 
1 
2 
3 
XLII 
9 
Paracyclas, .... 
i 
4 
5 
XLI II 
15 
Schizodus, .... 
1 
i 
3 
8 
2 
XLIV 
4 
Prothyris, .... 
2 
2 
XLV 
1 
Solemya, ..... 
i 
XL VI 
1 
Tellinopsis, .... 
i 
XL VII 
4 
Cimitaria, ..... 
3 
1 
XL VIII 
3 
Pholadella, . 
2 
1 
i 
XLIX 
6 
Phthonia, ..... 
4 
2 
L 
5 
Orthonota, .... 
4 
i 
LI 
1 
Palaeosolen. 
1 
LII 
6 
Cypricardinia, 
1 
i 
2 
i 
2 
Carboniferous. 
