212 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Order C. HYPEROARTII. The Lampreys. 

 Family IV. PETROMYZONIDiE. The Lampreys. 



Genus 6. BATHYMYZON Gill. 

 Bathymyzon Gill, Proc. U. S. Nat. Mus. 1883, 254 {hairdii). 



7. Bathymyzon bairdii Gill. 



Gulf Stream. 



Peiromyzon (Baihymyzon) hairdii Gill, Proc. U. S. Nat. Mus. 1883, 254, Gulf 

 Stream at lat. 49^ N., in 547 fathoms. 



Genus 6. PETROMYZON (Artedi) Linnaeus. 



Petromyzon (Artedi) Linuaeus, Systema Naturae, ed. x, 230, 1758 (marinus). 



8. Petromyzon marinus Liunteus. Great Sea Lamprey; Lamprey Bel. 



Atlantic coasts of Eui'ope and North America, southward to Chesapeake Bay. 

 Petromyzon marinus Linna-us, Syst. Nat., ed. x, 230, 1758, European seas; 

 after Artedi. 



8a. Petromyzon marinus unicolor (DeKay). 

 Lakes of northern and central New York. 

 Ammoccetes unicolor DeKay, N. Y. Fauna : Fishes, 383, 1842, Lake Champlaiu. 



Genus 7. ICHTHYOMYZON Girard. Biver Lampreys. 

 Ichthyomii-on Girard, Pac. R. R. Surv., x, 381, 1858 (argenteus). 



9. lohthyomyzon concolor (Kirtland). Silvery Lamprey. 



Great Lakes, Upper Mississippi Valley, and Rainy Rivi^r. 



Ammoccetes concolor Kirtland, Bost. .lour. Nat. Hist., iii, 1840, 473, with plate, 

 Mahoning and Scioto rivers, Ohio. 



10. lohthyomyzon castaneus Girard. 



Mississippi Valley. 



Ichthyomyzon castaneus Girard, Pac. R. R. Surv., x, 381, 1858, Galena, Minn. 



Genus 8. ENTOSPHENUS Gill. 



Entosphenus Gill, Proc. Ac. Nat. Sci. Phila. 1862, 331 (fridentatiis). 



11. Entosphenus tridentatus (Gairdner). 



Pacific Coast of America, Unalaska to southern California. 

 Petromyzon tridentatus Gairdner, in Richardson, Fauna Bor.-Am., 293, 1836, 

 Fails of the Walamet (now Willamette) River, Oregon. 



Genus 9. LAMPETEA Gray. Brook Lampreys. 

 Lampetra Gray, Proc. Zool. Soc. Loud. 1851, 235 {fluvialts). 



12. Lampetra aurea( Beau). 



Yukon River and streams of Alaska and Kamchatka. 



Ammoccetes aureus Bean, Proc. U. S. Nat. Mus. 1881, 159, Yukon River 



13. Lampetra spadicea Bean. 



Guanajuato, Mexico. 



Lampetra spadicea Bean, Proc. U. S. Nat. Mus. 1887, 374, Guanajuato. 



14. Lampetra cibaria (Girard). 



Pacific slope of America, from Eraser River to the Sacramento. 

 Ammoca'tes ciharius Girard, Pac. R. R. Surv., x, 383, 1858, Puget Sound. 



15. Lampetra vyilderi (Gage). Small Black Lamprey ; Pride; Prick. 



Western New York to Iowa, in tributaries of the Great Lakes and the Missis- 

 sippi. 



Ammocwtes wilderi Gage, in Wilder Quarter-Century Book, 436, 1893, Cayuga 

 Lake, New York. 



