150 MEMOIRS OF THE CARNEGIE MUSEUM. 



Localities in Pennsylvania, represented in the Carnegie Museum: 



Lake Erie, Presque Isle Bay, and beach-pools of Prcsque Isle, and lagoon at Waldamer Park, Erie, 



Erie Co. 

 Pond at mouth of Elk Creek, Miles Grove (North Girard), Erie Co. 



Other localities represented in the Carnegie Museum: 



Lake Ontario, Braddock Bay, Manitou Beach, Monroe Co., New York (R. H. Santens).'"* 



Lake Erie, Port Dover, Norfolk Co., Ontario, Canada (C. Goodrich). 



Lake Erie, Sandusky Bay, Cedar Point, Erie Co., Ohio (0. E. Jennings) (normal). 



Lake Erie, La Plaisance Bay, Monroe Co., Michigan (C. Goodrich) (young specimens). 



Cedar Creek, Jerusalem Township, Lucas Co., Ohio (C. Goodrich). 



Marsh, north of Toledo, Lucas Co., Ohio (C. Goodrich). 



Miami and Erie Canal, Waterville, Lucas Co., Ohio (C. Goodrich). 



Maumee River, Roche de Boeuf Rapids, Lucas Co., Ohio (C. Goodrich).'"^ 



Grand Reservoir, Mercer Co., Ohio (C. Goodrich)."" 



Silver Lake, Clark Co., Ohio (Hartman collection).'"* 



Tippecanoe Lake, Kosciusko Co., Indiana (E. B. Williamson).'"' 



Lake Huron, Port Huron, St. Clair Co., Michigan (N. M. Grier). 



Black Lake, Muskegon Co., Micliigan (Exch. Alabama Museum). 



Big Bass Lake and Au Sable Lakes, Lake Co., Michigan (C. Goodrich). 



Douglas Lake, Cheboygan Co., Michigan (H. B. Baker). 



Muskoka Lake, Bala, Muskoka Co., Ontario, Canada (A. S. Daggette). 



Lake Helen, Nipigon, Ontario, Canada (0. E. Jennings). 



Lake Superior, Nipigon Straits, St. Ignace Island, Ontario, Canada (0. E. Jennings). 



Blackwater River, Jellicoe, Ontario, Canada (0. E. Jennings) (Tributary of Lake Nipigon). 



Long Lake, Longuelac, Ontario, Canada (0. E. Jennings). 



In 1914, Dr. Jennings collected a form in Lake Nipigon (Orient Bay), which, in shape and beak- 

 sculpture, is a true A. grandis, but has a peculiar rough epidermis. I haye not yet been able to identify 

 this. < 



Distribution and Ecology (See fig. 14) : Type locality, Winnebago, Winnebago 

 Co., Wisconsin (Lea). 



In Pennsylvania this form is restricted to Lake Erie, and although individuals 

 resembling it have been found in the uppermost Shenango, they were associated 



'°^ An interesting set of sixteen specimens, containing individuals inflated like typical fooiiana, 

 some much more flattened, almost like typical grandis, with intermediate stages between these. Outline 

 of the shell elongated-ovate, shorter or longer, like the creek-form of grandis, beak-sculpture more like 

 grandis. Color light green to gray or brownish green. These are truly intergrades. 



'"' A special (river-) form, heavy shelled, greenish, mth rather heavy beak-sculpture. Considerably 

 inflated at the beaks. A link in the chain of intergrades. 



'"" Inflated like foot i ana, but in outline resembling the gigantea type. 



'"* A typical elongate-subovate, greenish footiana. The specimen was labeled as given, but I can- 

 not find a Silver Lake in Clark Co., but there are places of this name in Logan and Summit Cos. 



. '"' Wabash-drainage. A peculiar large form, resembling the form of grandis gigantea from W'iuona 

 Lake, but more swollen, and with the beak-sculpture o! footiana. 



