Grier: Morphological Features of Mussel-shells. 171 



Table IV. — Continued. 

 Proptera alata. Comparison Upper Ohio, Drainage with Lake Erie. 



No 

 Spec. 



L 



PD 



17' 



AD 



IT' 



AHL 

 ~L~' 



TH 

 DVD' 



Allegheny River (12, 14, 15) 



Presque Isle (99-119) 



Ohio River (55-S6) 



Lake Erie (99-102) 



La Plaisance (98) 



Presque Isle (101-119) 



Presque Isle (101-119) 



Monongahela River (51) . . . 



14 



14 



6 



6 



4 

 4 



•345 

 •379 

 .310 

 .404 



•31S 

 .322 

 •430 

 •314 



740 

 789 

 809 

 807 

 686 

 730 

 825 

 766 



■713 

 .708 

 .664 

 .709 

 • 739 

 .764 

 .710 

 .668 



28s 

 292 



335 



290 



261 



2430 



289 



330 



•563 

 .536 

 ■558 

 •555 



• 543 

 •514 

 •575 



• 575 



.2327 

 .218 

 .2142 

 .222 



.1470 

 • 1851 

 .226 



.0991 



.0960 

 .0769 



•0517 

 .0507 

 .0690 

 .0825 



Anodontoides ferussacianus. Comparison Upper Ohio Drainage with Lake Erie. 



Beaver tributaries (60-66, 62, 



69) 



Presque Isle (99-120) 



Presque Isle (99-120) 



Lake Erie tributaries (139-140) 



Presque Isle (99-120) 



French Creek Drainage (22-34) 



Presque Isle (99-120) 



Beaver Drainage (60-85) 



Presque Isle (99-120) 



Shenango Drainage (61-69) . . . 



•0563 

 •0564 

 .0572 

 .0514 

 •0538 



.0636 



•0538 

 •0530 

 .0497 

 •0518 



Euryhia recta, Lake Erie Drainage. 



La Plaisance Bay 



Cedar Point 



Presque Isle Bay 



Maumee River, Station Pond 

 Rapids 



.1220 

 .1187 

 •1332 



.180 



Lampsilis liileola rosacea, Lake Erie Drainage. 



La Plaisance Bay, Monroe Co., 



Mich 



Cedar Point 



Presque Isle Bay 



Port Colborne, Ontario , 



• 1757 

 .1160 

 .0994 

 .2082 



