578 



Table 22. 



BULLETIN OF THE BUREAU OF FISHERIES 



. — Records of the occurrence of Leucichlhys alpense in Lake Huron — Continued 



Port from which nets 

 were set 



Lake Huron proper — 

 Continued. 

 Tug records. 



Bay City, Mich- 



Harbor Beach, 

 Mich. 



Duck Islands, 

 Ontario, A. 

 Purvis. 

 North Channel: 



John Merrylees.. 



D. Beneteau 



Georgian Bay: 

 Lions nead, 

 tario. 



On- 



Wiarton, Ontario 



Stanley Boyd 



Owen Sound to 

 Meaford, D. 

 Mclnnis. 



Rec- 

 ord 

 No. 



40 



43 



Date 



April-Novem- 

 ber, 1923. 



Oct. 29, 1921 



Nov. 25, 1925... 



Oct. 27, 1917. 



Mar. 15, 1919... 

 May-August, 

 1919. 



August, 1919... 

 Januarv- Febru- 

 ary, 1919. 



July 30, 1919 



Oct. fi, 1919__ 

 Nov. 6, 1927. 



July 28, 1919 



July 30, 1919 



Nov. 19, 1919.... 



Nov. 28, 1919 



Dec. 3, 1919 



June 10, 1922.... 

 June 26, 1923.... 

 November and 

 early Decem- 

 ber, 1923. 



Location 



Saginaw Bay at Tobico. 

 Saginaw Bay at Nayan- 



quing. 

 35 miles NE. by N.MN. 



of city. 



Off the islands. 



Off Gore Bay Light- 

 North Channel 



21 miles east of Surprise 

 Shoal. 



Off White Bluff 



6H miles northeast of 



Griffith Island. 

 Off Cape Croker 



Colpoys Bay 



do 



do 



Off Cape Croker. 



do 



In sound and 

 shore. 



Gill-net 

 mesh 



inches 



(•) 

 (•) 



) 



3 



) 



3 





50 



iy 2 



31 





20-30 



4^ 



3 

 3 



3 

 3 

 3 

 3 



3 

 3 



Depth, 



in 

 fathoms 



20-30 



20-25 

 20-25 



60 



70 

 45-60 



52 



10-25 

 10-25 



10-25 



Bottom 



Clay. 



...do 



Rock and 

 gravel. 



Mud. 



_do_ 

 _do_ 



... do. 



Mud.rock- 

 ...do 



Weight 

 of lift, 



in 

 pounds 



1, 183 



400 

 425 



500 



755 

 380 



Per- 

 cent- 



(>) 



(') 

 (') 



48 



21 



48 



(') 

 ( 3 ) 



50 



100 

 100 



' Rare. 



3 Lift not examined or percentage not ascertained. 



• Pound net. 



Table 23. — Numerical expressions of certain systematic characters for 20 specimens of Leucichthys 

 alpenx from Lake Huron, 10 of them more than 200 millimeters long and 10 less than 200 milli- 

 meters long, selected according to size 



Size 



Field 

 No. 



Locality 



Length, 

 milli- 

 meters 



Sex 



Rakers 



Scales 



L/H 



L/O 



L/DB 



L/AB 



L/DA 



L/AT 



L/D 



L/W 



DW 



SD/H 



SD/O 



Over 200 



844 



Cheboygan, 



315 



9 



14+25 



82 



4.2 



6.1 



10.0 



10.7 



2.8 



7.8 



4.0 



8.5 



2.1 



2.2 



3.1 



milli- 





Mich. 

































meters. 



62 



do 



260 



9 



14+24 



79 



4.1 



5.7 



8.8 



9.1 



2.8 



8.2 



4.1 



8.9 



2.1 



2.0 



2.8 





141 



Alpena, Mich. 



305 



9 



13+24 



78 



4.1 



6.1 



10.0 



10.1 



2.8 



8.2 



4.0 



8.0 



2.0 



2.2 



3.0 





143 



do 



296 



9 



14+24 



74 



3.9 



5.5 



10.0 



9.8 



2.8 



7.8 



4.3 



9.2 



2.1 



2.0 



2.8 





142 



do... 



337 



& 



14+25 



81 



4.1 



5.7 



8.3 



9.3 



2.8 



8.4 



4.0 



8.4 



2.1 



2.0 



2.8 





147 



do. 



310 



9 



13+23 



75 



4.1 



5.9 



10.0 



10.2 



2.8 



8.8 



3.7 



7.4 



2.0 



2.1 



3.0 





144 



do 



274 



9 



13+24 



82 



4.2 



6.1 



9.2 



10.4 



2.7 



8.6 



4.2 



7.7 



1.8 



2.0 



2.9 





137 



do 



299 



cT 



15+23 



80 



4.2 



6.0 



10.0 



9.2 



2.7 



8.2 



3.8 



7.6 



1.9 



2.0 



2.9 





146 



do 



289 



9 



15+25 



80 



4. 1 



5.6 



9.0 



10.5 



2.7 



8.4 



3.7 



7.8 



2.0 



2.0 



2.8 





136 



do 



342 



9 



13+24 



78 



4.2 



6.0 



10.3 



11.0 



2.9 



8.1 



3.9 



7.6 



1.9 



2.1 



3.0 



Under 200 



•12B 



Harbor Beach, 



169 



Im.9 



13+23 



77 



4. 1 



5.6 



9.3 



8.8 



2.8 



8.0 



4.3 



8.2 



1.9 



2.0 



2.7 



milli- 





Mich. 































meters. 



49B 



do 



178 



9 



13+22 



79 



4.2 



5.7 



10.0 



9.6 



2.8 



8.0 



4.5 



7.9 



1.7 



2.0 



2.7 





57B 



do 



173 



9 



13+23 



84 



4.1 



5.7 



10.2 



10.0 



2.8 



7.8 



4.4 



8.4 



1.8 



2.0 



2.8 





59B 



do 



189 



Im. 9 



13+23 



83 



4.1 



5.8 



10.0 



10.9 



3.0 



7.8 



4.2 



8.2 



1.9 



2.0 



2.8 





60B 



do 



161 



Im. j 



12+21 



79 



4.1 



5.3 



8.8 



10.0 



2.8 



8.0 



4.1 



7.6 



1.8 



2.0 



2.6 





61B 



do 



157 



Im. cf 



12+21 



77 



3.9 



5.2 



11.2 



9.2 



2.9 



7.9 



4.1 



8.3 



2.0 



1.9 



2.6 





72B 



do 



161 



Im. c? 



11+20 



72 



4.0 



5.4 



9.0 



9.2 



2.8 



8.0 



4.6 



8.2 



1.7 



1.9 



2.6 





73B 



do. 



165 



Im. C? 



13+23 



76 



3.9 



5.3 



9.7 



9.1 



2.9 



7.1 



4.3 



9.0 



2.0 



1.9 



2.6 





74B 



do 



156 



Im. <? 



12+21 



76 



4.2 



5.6 



10.0 



9.6 



2.9 



8.2 



4.3 



8.8 



2.0 



2.0 



2.8 





75B 



do 



164 



Im. 9 



12+20 



76 



3.9 



5.2 



9.1 



9.7 



2.9 



8.5 



4.2 



7.6 



1.8 



1.9 



2.5 



