72 Lake Maxinkuckee, Physical and Biological Survey 



At the Tippecanoe River this is one of the favorite foods of the 

 muskrat, and it must be difficult for them to hold their own against 

 that rodent. 



14. MICROMYA FABALIS (Lea) 



Rare ; previous to 1913 only one shell had been found ; this 

 was picked up on the north shore of the lake in 1907. In 1913 

 several shells, recently cleaned out by some animal, probably a 

 muskrat, were found at the wagon bridge. This species is fairly 

 common in Tippecanoe Lake and frequent in the Tippecanoe River 

 at Delong where it was collected in shallow water near shore in 

 rather stiff blue clay. It is the smallest of our Unionidse. The 

 white or bluish white nacre has an exceedingly brilliant luster. 



Several other species of mussels have been recorded for the 

 lake, among them Quadrula lachrymosa (Lea), Alasmodonta mar- 

 ginata Say, Symphynota compressa Lea, Anodontoides ferussaci- 

 anus (Lea) , Ptychobranchus phaseolus (Hildreth), Ob ov aria cir cu- 

 ius Lea, Lampsilis parva (Barnes) , and Lampsilis gracilis (Barnes) . 

 We have seen representatives of none of these species from the lake, 

 and while some, such as A. ferussacianus, are very probably pres- 

 ent, others are very improbable. 



MOLLUSKS OTHER THAN UNIONIDSE 



About 116 species of mollusks in addition to the Unionidse are 

 known to occur in Lake Maxinkuckee or its immediate vicinity. 

 Specimens of nearly all of these species were collected during our 

 investigations; others were collected by the late L. E. Daniels. 

 These collections were referred to Dr. Paul Bartsch of the United 

 States National Museum for study and report. Other duties have 

 prevented Dr. Bartsch from completing his full report on these 

 mollusks. He has, however, supplied the following list of his 

 identifications. This shows that the Lake Maxinkuckee molluscous 

 fauna is a remarkably rich one, the total number of species, in- 

 cluding the Unionidse, being not fewer than 130. 



FRESHWATER MOLLUSKS 



1. Lymnsea palustris (Miiller) 



2. Lymnsea obrussa exigua (Lea) 



3. Lymnsea danielsi Baker 



4. Lymnsea dalli Baker 



5. Lymnsea humilis (Say) 



6. Lymnsea desidiosa (Say) 



7. Planorbis bicarinatus Say 



