16 MUSSELS OF BIG BUFFALO FORK OF WHITE RIVER. 



orange nacre, closely resembling a form common in Green River, Ky. 

 This species is of no commercial importance. 



It was found at the following stations: 1, scarce; 3, common; 4, 

 abundant; 6, scarce; 8, scarce; 9, common; 10, scarce; 11, scarce; 14, 

 scarce; 16, scarce; 17, scarce; 18, scarce; 19, scarce; 21, scarce; 22, 

 scarce; 23, scarce; 24, common; 25, scarce. 



Niggertoe^ Alasrmdonta truncata {B. H. Wnght). — Rare; only 

 seven shells obtained, one at station 4, one at station 9, another at 

 station 12, and three at station 15, where it was called " niggertoe." 

 Where it reaches its best development this is a beautiful shell. It is 

 however, of no commercial importance. 



Alasmidonta calceola {Lea). — Only two shells were collected, one 

 at station 3 and one at station 9. This does not necessarily mean that 

 it is rare, as on account of its small size and habit of burying itself 

 in the bottom it is easily overlooked. 



Sand 7nussel, Symphynota costaia {Ra-fi7iesque) . — A fairly common 

 shell, found throughout the entire length of the river examined, and 

 represented in the collection by 90 specimens. Most of the shells are 

 of medium size, a few are smaller, but none very small, the smallest 

 being about 3 inches long. There is no very marked variation among 

 them; one specimen obtained at station 6 is compressed and some- 

 what deformed, and one from station 19, probably a female, is in- 

 flated, with deep costse. At station 15 they were called " sand 

 mussels." On account of the yellowish, lusterless nacre and usual 

 thinness of shell, mussels of this species have no commercial value. 



It was found at the following stations: 4, common; 5, abundant; 

 6, common; 7, scarce; 8, scarce; 9, abundant; 10, scarce; 11, scarce; 

 14, abundant; 16, common; 17, scarce; 18, abundant; 19, scarce; 21, 

 scarce; 22, scarce; 24, scarce; 25, common; 26, scarce. 



Strophitus edentulus {Say). — Although this shell is found through- 

 out all the portion of the river examined, it is rather scarce nearly 

 everywhere and nowhere abundant. One shell found at station 2 was 

 short and truncate. The others were much alike and quite thin. 

 Strophitus edentulus is an exceedingly variable shell, especially as 

 regards thickness, and the nacre varies from bluish to yellowish. 

 Even the best shells are of no commercial value. 



It was found at the following stations: 2, scarce; 3, common; 4, 

 scarce ; 12, scarce ; 17, common ; 25, scarce. 



Young fantail^ Cy progenia aberti {Conrad). — Not common; only 

 10 examples secured, the first one at station 6, and the last three at 

 station 25. Most of the specimens are rather old and somewhat worn, 

 a few are of medium size with the epidermis entire. Call suggests a 

 resemblance between a young C. aherti and Plagiola elegans. The 

 half-grown shells of this collection have rather the contour of Quad- 

 rula lachrymosa., but are without tubercles, only very low elongated 



