266 



The only other lake examples with which the Lake Maxinkuckee 

 specimens of this species have been compared, are some collected in 

 Lake Erie at Put-in-Bay. The Lake Erie shells are much unlike the 

 Maxinkuckee specimens, being short, humped and remarkably solid and 

 heavy. Similar shells to those of Lake Erie are found in some of the 

 small southern rivers. 



We have no notes referring to gravid examples in the lake. This 

 was probably because the most active work in collecting and examining 

 mussels was carried on in the autumn, and the breeding period of this 

 species is in early summer. 



4. Ala><))iidonta calceola (Lea). 



Judging from the dead shells found scattered along shore, this is 

 not a particularly rare species in the lake. The shells were found most 

 abundantly along the north shore of the lake, although they were also 

 found along the east and southeast portion and were not infrequent 

 between Arlington and Long Point. No living examples were found. 

 On account of its small size and its habits, this is a rather difficult species 

 to find, even where common, except under favorable conditions such as 

 exceptionally low water, when the mussels move about more or less. 

 Nothing was therefore learned of its habits in the lake. In the Tippe- 

 canoe River near Delong, Ind., this species was rather common in stiff 

 blue clay near shore, and it is fairly abundant in Yellow River at Ply- 

 mouth. Here, although the dead shells were common, the living examples 

 were difficult to find until, during a period of very low water, they 

 began actively moving about and could be tracked down. The species, 

 which reaches an unusually large size in Yellow River, was there found 

 gravid in autumn (September and October). The glochidia are of the 

 Anodonta type, chestnut-shaped or rounded-triangular in outline, with 

 large hooks at the ventral tips of the valves. 



.5. Anodonta grandis footiana (Lea). 



Although the genus Anodonta is generally regarded as the "Pond- 

 mussel" pai- excellence, the species of which might naturally be expected 

 to be at home in lakes and ponds and thrive in such places even better 

 than in rivers, the Anodantas of Lake Maxinkuckee show, along with the 

 river species proper, the dwarfing influence of the lake. Moreover, Aiio- 

 donta is not as one might naturally expect, the most abundant mussel in 



