STATION IN FRESH-WATER MUSSELS. 279 



Quadrnla bcauchampi Marsh, '02 (Little Tennessee and Holston). — 

 Simpson, '14, p. 895. 

 Dia. (Simpson) : 61 per cent. 



2. FuscoNAiA PILARIS LESUEURiANA (Lea). — Dia. 45-54 per 

 cent. 



Unio lesueurianus Lea, '40 (Caney Fork and Holston). — Synonym 



to pilaris, according to Simpson. 



Dia. (Lea) : 51 per cent. — Simpson's measurements of pilaris 

 (47 and 54) belong here. 

 Quadrnla flexuosa Simpson, '00 (Holston). — Simpson, '14, p. 887. 



Dia. 51 per cent. 



3. FuscoNAiA PILARIS BURSA-PASTORis (Wright). — Dia. less than 

 45 per cent. 



Unio hiirsa-pastoris Wright, '96 (Powell R., Va.). — Qiiadrala bitrsa- 

 pastoris Simpson, '14, p. 890. 

 Dia. (Simpson) : 35 per cent. 



I shall follow the same scheme as before, and go up the Ten- 

 nessee and the tributaries : Holston, Clinch, Powell, etc. 



Loc. No. Max. Min. Av. 



Tennessee River. 



Knoxville 8 64 53 57 pil. {les.) 



Holston River. 



McMillan i 50 50 50 les. 



Mascot 16 63 47 56 pil. (les.) 



Hodges 2 53 51 52 les. 



Turley Mill 4 56 43 47 les. (pil.) (b.-p.) 



Noeton 7 60 48 51 les. (pil.) 



Holston Station 7 54 47 51 les. 



Church Hill 3 47 43 45 les. (b.-p.) 



South Fork Holston River. 



Pactolus 10 49 39 45 les. (b.-p.) 



Bluff City 5 45 39 42 b.-p. (les.) 



Watauga River. 



Watauga i 40 40 40 b.-p. 



North Fork Holston River. 



Rotherwood 7 54 44 50 les. {b.-p.) 



Holston Bridge i 46 46 46 les. 



Hilton 9 48 41 43 b.-p. (les.) 



Mendota i 38 38 38 b.-p. 



