REPORT OF COMMISSIONER OF FISH AND FISHERIES. [6()'] 



Family LXXVIII— POLYNEMIDJ3. (Gs) 



224.— POLYNEMUS Liinueus. 



743. Polynemus virginicus' LinniPus. W. (GnOc) 



744. Polynemus approximans- Lay «& Bennett. P. 



745. Polynemus opercularis^ Gill. P. 



746. Polynemus octonemus^ Girard. S. 



Order Z.— PERCOMORPHI.^ 

 Family LXXIX. — AMMODYTlDiE. (G9) 



225.— AMMODYTES Liuuaius. (204, 205) 



747. Ammodytes americanua DeKay. N. (652, 656) 

 747b Animodijicii americaiiuR pcrsonatns CAnird. A. C. (653) 



748. Ammodytes alascanus Cope. A. (654) 



749. Ammodytes dubius Reiuhardt. B. (655) 



Family LXXX.— ECHENEIDID^. (70) 



226.— ECHENEIS. (JOii) 



750. Echeneis naucrates liinnjcns. N. S. O. VV. P. C. (0'-7) 



227.— PHTHEIRICHTHY3 Gill. i-OGh.) 



751. Phtheirichthys lineatus M«M)zie,s. S. W. (657 ft.) 



228.— REMORA Gill. (206o) 



752. Remora remora Linna;n8. S. O. W. P. C. (658) 



753. Remora brachyptera Lowe. W. O. ((>50) 



754. Remora albescens" Temniinck & Schlegel. P. S. 



229.— RHOMBOCHIRUS Gill. (207) 



755. Rhombochirus osteochir Cuvier. O. W. (660) 



> Polynemus virginicus L. Syst. 'biat.=Pol!jdact!/hi8 jj?M»iien Lac^pfede. See Jordan, 

 Proc. U. S. Nat. Mns., 1884, 118. 



^Polynemus approximans Lay «fe Bennett, Beechey's Voyage, Zool. Fish, 57; Giinther, 

 Fish. Centr. Amer., 1861), 423. Gulf of California to Panama. 



■' Trichidion opercularis Gill, Proc. Ac. Nut. Sci. Pliila., 1863, 1G9 =: Polynemus melan- 

 opoma Giinther, Fish. Centr. Anicr. l'-69, 4Jl. Gulf of California to Panama. 



* Polynemus octofiUs Gill is without nuich doubt the adult form oi P. octontmus. See 

 Jordan & Gilbert, Proc. U. S. Nat. Mns., 1882, ^,'JO. The pectoral fin grows darker in 

 color and the pectoral filaments shorter with age in other species of Polynemus and 

 probably iji this one also. 



'^ Percomorphi and Pharyn<io(jnaihi Cojic, Trans. Am. Philos. Soc. Phila., 1871, 458 

 (exclusive of the Ilhegnoptcri=Polynemida', wliich bavc the ventral fins truly abdominal 

 and may be placed in the Percesoces.) 



^Echeneix albescens Temminck «S: Schlegel, Fauna Japonica, Poiss., 272; Giinther II, 

 377; Streets, Bull. U. S. Nat. Mus., Irt77, VII, 54. Coastsof Eastern Asia, a specimen 

 taken at La Paz, Gulf of California (Streets) and in the Gulf of Mexico {Bean). D. 

 XIII-22 ; A. 22. 



The Evhentididir are regaided by Dr. Gill as constituting a distinct suborder, 

 Discocephali, defined by him Proc. U. S. Nat. Mus., 1882, -AV-i. 



