288 ORTMANN—CORRELATION OF SHAPE AND 
general results, and to support them by tables of measurements. 
The material of this species is rather rich, and I shall not give the 
measurements of all of it, but shall restrict myself to selected 
examples which show the law clearly. 
I have distinguished here three forms. 
I. FUSCONAIA BARNESIANA (Lea).—Dia. 40-49 per cent. 
2. FUSCONAIA BARNESIANA BIGBYENSIS (Lea).—Dia, less than 
40 per cent. 
3. FUSCONAIA BARNESIANA TUMESCENS (Lea).—Dia. 30 per 
cent. or over. | 
I first give the material from three large rivers in the vicinity 
of Knoxville. 
Loc. No. Max. Min. Av. 
Tennessee River, Little R. Shoals. 1 57 57 57 tum. 
Little Tenn. River, Monroe Co... 3 57 51 54 tum. 
French Broad. River, Boyd Creek. 5 55 45 50 tum. (barn.) 
Holston River. 
IMASGOEE eter io Sere snk nk tee toe I 48 48 48 barn. 
OU PES eer. tei lebsnio siete non ak: 5 50 4I 46 barn. (tum.) 
eta ley Mall tery rates sepaticre tees I SI 51 51 tum. 
INDErOT eri aeciiileaats etch ocak is 2 Ac 40 barn. (tum.) 
Elolstone Station) -osren ee. nee 2 48 46 47 barn. 
PATISEUMIM TM ererin te ae eaibele ae hee I 4o 40 4o barn. 
South Fork Holston River. 
IPACtOLUG Meee ccs oc Acme 3 45 42 43 barn. 
Blithe City yA kaa sacle neon es 8 42 36 39 bigb. (barn.) 
Grim Chinas tere a er aoe 8 39 35 37 bigb. 
BATE OMe sci< oka ote sleeves Mts I 34 34 34 bigb. 
Middle Fork Holston River. 
G@hilhowient aioe secchinn tases 3 37 35 36 bigb. 
North Fork Holston River (next station below, Austin Mill, has av. 40 
per cent. = barn.). 
Loc. No. ‘Max. Min. Av. 
ROthenwoods nite tasers eee res 8 43 38 40 barn. (bigb.) 
Mend Otanmeer ts testes cen emer pier 4 4I 36 39 bigb. (barn.) 
EolstonPawOy carcasses or 5 40 35 SY/ bigb. (barn.) 
Saltivillesar- cine c.et cusonice errr U7 39 34 37 bigb. 
Big Mocasin Creek (next station below, Rotherwood, has av. 40 per cent.). 
Loc. No. Max. Min. Av. 
MoccasinmuGany case. oeeeene tee 10 40 32 37 bigb. (barn.) 
WAU None Syosinres soopaueoononno0se 2 38 35 36.5 bigb. 
