PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 521 



IVOTE OIV THE PETBOMYZONTIDS. 



BY" TKSODORE Gli.lL. 



The purpose of the present note is to make known the characteristics 

 of a genus [Entosphenus) proposed by me long ago, and, in connection 

 with it, diagnoses of the genera of the family Petromyzoutidie are given, 

 as well as the synonymy of the several groups of the order Hypero- 



ARTIA, 



THE ORDER HYPEROARTIA. 



Synonyms as orders. 



<Cyclostomi, Bonaparte, Giorn. Accad. cli Scienze, t. 52 (Saggio. Distrib. Metod. Ani- 

 niali Vertebr. a Sangue Freddo, p. 41), 1832. 



< Helmiutboidei, Bonaparte, Nuovl Annali delle Sci. Nat., t. 2, p. 133, 1838 ; t. 4, p. 277, 



1840. 

 = Hyperoartia, Milller, Abhandl. K. Akad, Wiss. zn Berlin, 1844, p. — . 1846. 



< Hyperoartii, Bonaparte, Cat. Metod. dei Pesci Enropei, pp.9*, 91,* 1846. 

 <Gyclostouiata, Fitzinger, Sitzungsber. K. Akad. der Wisseusch. (Wien), B. 67, 1. 



Abth., p. .'^7, 1873. 



The order 10, " Helminth oidei" is identical with the " Sectio 6, Cyclos- 

 tomi" and the "Subclassis 4, Marsipobranchii " of Bonaparte. 



PETROMYZONTID^. 



Synonymy. 



=: Lampredini, Bafinesque, Indice d'lttiolog. Siciliana, p. — , 1810. 



< Cyclostoniia, Bafinesque, Analyse de la Nat., p. 94, 1815. 



<Suceurs, Cyclostoines, Ciivier, Regne Animal [Ire^d.], t. 2, p. 116, 1817; 2e 6d., t. 2, 



p. 49, 1829. 

 = Anloedibranchia, LatreiUe, Fam. Nat. du Regne Animal, p. Ill, 1825. 

 = Petromyzides, Bisso, Hist. Nat. de I'Europe Merid., t. 3, p. 99, 1826. 

 <^ Petromyzonidse, Bonaparte, Giorn, Accad. di Scienze, v. 52 (Saggio Distrib. Metod. 



Animali Vertebr. a Sangne Freddo, p. 41), 1832. 

 <r Petromyzonidse, Swainson, Nat. Hist, and Class. Fishes, etc., v.^, pp, 196, 337, 1839. 

 = Petromyzonidse, Bonaparte, Nuovi Annali delle Sci. Nat., t. 2. j). 133, 1838; t. 4, 



p. 277, 1848. 

 <^ Petromyzidse, Gray, Syn. Brit. Mns., pp. 148,150 (fide Gray), 1842. 

 = Petromyzontidse, Girard, Expl. and Surv. for R. R. Route to Pacific Oc, v. 10, 



Fishes, p. 376, 1858. 

 — Petromyzoutoidei, Bleelcer, Ennm. Sp. Piscium Archipel. Indico, p. xxxiii, 1859. 

 = PetromyzontoidsB, Gill, Cat. Fishes E. Coast N. America, p. 62, 1861. 

 = Petromj^myzonini, Siehold, Siissvvasserfische von Mitteleuropa, p. 366, 1863. 

 = Petromyzontidse, Giinther, Cat. Fishes Brit. Mus., v. 8, p. 499, 1870. 

 = Petromyzontes, Fifzinyer, Sitzungsber. K. Akad. der Wissensch. (Wien), B. 67, 



1. Abth., p. 58, 1873. 



