630 



BULLETIN OF THE BUREAU OP FISHERIES 



Table 97. — Numerical expressions of certain systematic characters for 10 specimens of Prosopium 

 quadr Hater ale from Lake Michigan, selected according to size and locality 



Field 

 No. 



Locality 



Length 



Rakers 



Sex 



Scales 



L/H 



L/O 



L/DB 



L/AB 



L/DA 



L/AT 



L/D 



L/W 



D/W 



SD/H 



SD/O 



SA/H 



2793 



Traverse City, 





































Mich 



249 



6+ 9 



Im. 9 



84 



5.4 



7.1 



9.3 



13.2 



2.4 



6.5 



4.6 



8.8 



1.8 



2.3 



3.0 



4.0 



2797 



Beaver Island, 





































Mich 



324 



7+11 





89 



5.1 



6.5 



9.8 



13.6 



2.7 



7.4 



4.7 



7.5 



1.5 



2.2 



2.8 



4.0 



2800 



do 



341 



8+11 



c? 



92 



5.4 



7.1 



8.7 



11.9 



2.3 



6.9 



4.3 



7.2 



1.6 



2.2 



2.9 



4.0 



3101 



Washington Har- 





































bor, Wis 



232 



6+11 



Im. 9 



94 



5.2 



7.0 



8.6 



12.8 



2.5 



7.0 



5.5 



8.5 



1.5 



2.2 



3.0 



3.9 



4280 



Milwaukee, Wis. 



254 



7+10 



Im. 9 



87 



5.5 



7.1 



10.3 



14.1 



2.4 



5.9 



5.0 



7.9 



1.5 



2.3 



3.0 



4.1 



4284 



do 



256 



7+11 



Im. 9 



92 



5.3 



6.9 



10.4 



15.2 



2.6 



5.9 



5.4 



8.0 



1.4 



2.3 



3.0 



4.0 



4392 



Michigan City, 





































Ind 



295 



7+10 



<? 



88 



5.4 



7.2 



9.4 



12.2 



2.4 



6.5 



5.0 



9.5 



1.8 



2.3 



3.0 



4.1 



4396 



do 



293 



6+10 



Im. 9 



95 



5.4 



6.9 



9.7 



13.4 



2.3 



6.1 



4.8 



8.1 



1.6 



2.4 



3.0 



4.1 



3373 



Manistee, Mich.. 



299 



7+ 9 



Evis. 



90 



5.2 



6.8 



9.5 



13.0 



2.5 



6.6 



5.3 



8.3 



1.5 



2.2 



2.9 



4.0 



4639 



Michigan City, 





































Ind.. 



270 



7+10 



Im. 9 



89 



6.2 



7.1 



10.0 



13.5 



2.4 



6.5 



5.4 



7.9 



1.4 



2.2 



3.0 



4.1 



Field 

 No. 



Locality 



SA/O 



H/E 



H/M 



H/S 



H/J 



H/Ad 



H/R 



O/E 



O/M 



o/s 



PV/P 



AV/V 



DR 



AR 



VR 



PR 



DC 



AC 



Br 



2793 



Traverse City, 











































Mich 



5.3 



4.3 



4.2 



4.1 



2.8 



3.0 



20.9 



3.3 



3.2 



3.1 



2.0 



2.2 



11 



10 



10 



14 



1.2 



1.4 



8 



2797 



Beaver Island, 











































Mich 



5.0 



4.3 



4.1 



3.7 



2.8 



3.1 



28.4 



3.4 



3.3 



2.9 



2.1 



2.2 



11 



9 



11 



16 



1.3 



1.3 



7 



2800 



do 



5.3 



4.5 



3.8 



4.1 



2.9 



2.8 



21.0 



3.4 



2.9 



3.1 



2.1 



2.2 



12 



11 



11 



16 



1.2 



1.2 



8 



3101 



Washington Har- 











































bor, Wis 



5.3 



4.1 



4.6 



4.4 



2.9 



2.9 



22.0 



3.1 



3.4 



3.3 



2.0 



2.3 



12 



11 



11 



15 



1.1 



1.4 



8 



4280 



Milwaukee, Wis... 



5.4 



4.5 



4.1 



4.1 



3.0 



2.8 



23.0 



3.4 



3.2 



3.2 



2.1 



2.3 



11 



9 



10 



16 



1.4 



1.5 



7 



4284 



do... 



5.2 



4.4 



4.7 



3.9 



2.8 



2.8 



24.0 



3.4 



3.6 



3.0 



2.0 



2.1 



12 



9 



11 



14 



1.4 



1.6 



8 



4392 



Michigan City, Ind. 



5.4 



4.5 



4.2 



4.0 



3.3 



2.8 



24.5 



3.4 



3.1 



3.0 



2.2 



2. 1 



12 



11 



11 



14 



1.3 



1.3 



7 



4396 



do 



5.2 



4.7 



4.5 



3.7 



3.1 



2.8 



24.3 



3.7 



3.5 



2.9 



2.2 



2.3 



13 



10 



11 



15 



1.3 



1.4 



7 



3373 



Manistee, Mich 



5.3 



4.4 



4.6 



3.7 



3.1 



2.9 



26. 1 



3.3 



3.4 



2.8 



2.0 



2.3 



12 



10 



11 



16 



1.3 



1.3 



7 



4639 



Michigan City, Ind. 



5.5 



4.5 



4.3 



4.0 



2.9 



2.8 



23.1 



3.3 



3.2 



3.0 



2.2 



2.2 



11 



10 



11 



15 



1.4 



1.4 



8 



Table 98. — Records of the occurrence of Prosopium quadrilaterale in Lake Huron 



[For each record is given, if known, the date and locality, the kind of gear used to make it, the depth of the water, and the total 



number of specimens examined] 



Port from which nets were set 



Date 



Location 



Method of capture 



Depth, 



in 

 fathoms 



Preserved 

 specimens 

 examined 



Lake Huron proper: 

 St. Ignace, Mich.. 

 Cheboygan, Mich 

 Alpena, Mich 



Duck Islands, Ontario. 

 North Channel: 



Blind River, Ontario.. 



Gore Bay, Ontario 



Kagawong, Ontario 



Georgian Bay: 



Wiarton, Ontario... 

 Killarney, Ontario. 



July 

 July 

 Sept. 

 Sept. 

 Sept. 

 Sept. 

 Sept. 

 Sept. 

 Nov. 

 Nov. 

 Oct. 



Oct. 

 Nov. 

 Nov. 

 Oct. 



17, 1917 

 21,1917 

 10, 1917 

 14, 1917 

 17, 1917 

 20, 1917 

 22, 1917 

 26, 1917 

 2, 1917 

 15, 1919 

 18, 1919 



6, 1917 

 7, 1917 

 10, 1917 

 16, 1919 



Nov. 5,1917 

 Oct. 10,1919 



Off the city 



8 miles south 



1V/2 miles SE. by S. of can buoy 



24 miles SE. by E. Y 2 E. of can buoy. 



13H miles SE. by S. of can buoy 



On north grounds 



15 miles SE. by S. )^ S. of can buoy. 



13 miles SE. by S. of can buoy 



7 miles ENE. of can buoy 



Off Greater Duck Island. 



Off Grant Island 



Off Barrie Island 



Off Clapperton Island. 

 ....do... 



7 miles above the city, in Colpoys 1 

 Otf the city.. 



Pound net 



4^-inch gill net. 

 do- 

 do. 



2%-inch gill net. 

 4)^-inch gill net. 

 .do. 



2M-inch gill net. 



do 



do 



Hand line 



4^-inch gill net. 



Pound net 



do... 



do 



.do. 

 .do. 



15 

 24 

 15 

 10-12 

 17 

 17 

 15 

 15 

 2 



3-5 

 5 



4 

 1 

 2 

 2 

 5 

 1 

 1 

 1 

 41 

 40 

 34 



6 

 2 

 3 

 2 



6 

 1 



