48 Kendall — Notes on Percopsis guttatus a nd Salmo omiscomaycuS . 



low as the lateral line, is of a pale color, marked with two lon- 

 gitudinal rows of black stelliform spots: below the lateral line 

 the color silvery: the belly white." 



Again on page 65, Walbaum's Petri Artedi Genera Pisciuni, 

 Additamentum, 1792, is " 18. Salmo, Omisco Maycus, radiis 5 

 membranaebrancbiostegae; Cauda bifurca. Pennant. Arct. Zool. 

 mi rod. p. 192. D. 11. P. 13. V. 8. A. 7. C. 



'Corpus fere spitbameum. Dentes in maxillis minuti. 

 Color in dorso usque ad lineam lateralem pallidus, duplici serie 

 macularum nigrorum, stellatarum notatus; infra lineam later- 

 alem argenteus; sub abdomine albus. Habitat in sinu Hud- 

 sonis." 



According to the rules of nomenclature ichthyologists accept 

 all of Walbaum's names as binomial and notwithstanding its 

 form this name falls in the same category as the others. But it 

 serins to have been disregarded or overlooked by the systematic 

 writers prior to Jordan and Evermann (Fishes of North and 

 •Middle America, part 1, page 487, 1896), who place it in the 

 synonymy of Salmo salar, probably assuming that it was a young 

 salmon. The description of Salmo Omisco Maycus and an 

 examination of specimens of Percopsis guttatus conclusively show 

 that they are specifically identical, and must be designated as 

 Percopsis omiscornaycus (Walbaum), however regretable this cir- 

 cumstance may be. 



Comparison of essential characters in Pennant's (Walbaum's) 

 description of the Omisco Maycus with the same characters in 

 Agassiz's description of Percopsis guttatus: 



1. Maximum length . . 



2. No. of branchiostegals 

 :!. No. of first dorsal rays 



4. No. of anal ray.s . . . 



5. No. of ventral rays 



6. Shape of caudal fin 



7. No. of pectoral rays . 



S. Teeth 



9. Color 



Pennant 

 ( Walbaum) 



\% inches 



5 



11 



7 



8 



" forked" 



13 



" minute " 



2 rows of black 



spots on side 



of hack. 



Agassiz 



6 inches 



(J 

 2, Hi 



1, 7 

 s 



"furcated" 

 12 



"excessively tine" 

 Sometimes in 2 

 rows 



