350 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



^Pi-etoral* narrow. with f*-w (l'2-ir>) rnys; ventral rays6; scales moderate. UMBRA, 105. 

 ** Pectorals broad, with many (33-36) rays; ventral rays 3; scales small.. DALLIA, 166. 



165. UlttBRA Muller. 



(Mclanura Agassiz.) 



(Kramer ; Muller, Abhandl. Akad. Wiss. Wien, Bcrl. 1842, 188 : type Umbra crameri 

 Mliller.) 



Body oblong, covered with cycloid scales of moderate size, without 

 radiating strife; no lateral line. Head shortish, little depressed. Eye 

 rather small. Cleft of mouth moderate. Ventral fins 6-rayed, below 

 or slightly in front of dorsal; anal fin much shorter than dorsal. Pec- 

 torals rather narrow, rounded, placed low, with 12-15 rays, which are 

 much jointed. Caudal rounded. Prcopercle and preorbital with mu- 

 cous pores. Branchiostegals 6. Gill-rakers short, thick. Size small. 

 Two species, very similar to each other, inhabiting the waters of the 



United States and Austria. (Latin, umbra, a shade.) 



* 



571. U. liini (Kirt.) Gthr. Mud Minnow; Dog-fish. 



Dark-green or olive, mottled, sides with irregular narrow pale bars, 

 these often obscure or wanting; a distinct black bar at base of caudal ; 

 whitish stripes sometimes present along the rows of scales. Head 3^ 

 in length; depth 4J. B. G; P. 14; D. 14; A. 8; V. 6; Lat, 1. 35; L. 

 trausv. 15. L. 4 inches. Vermont to Minnesota and South Carolina. 

 Abundant northward in weedy streams and ditches. " A locality which 

 with t lie .water perfectly clear will appear destitute of fish will perhaps 

 yield a number of mud-fish on stirring up the mud at the bottom and 

 drawing a seine through it. Bitches in the prairies of Wisconsin, or 

 mere bog-holes, apparently affording lodgment to nothing beyond tad- 

 poles, may thus be found filled with Mel<inums." (/.VmW.) 



(lli/ili-in-inii-ii Ihiii Kirtland, Bost. Journ. Naf . I list, iii, 'JT? : Mrltinnra annuJnta Ag. 

 Am. .Iniiiii. Sri. A. Arts, l-.".-l, 1 :'..",: Umbra Umi (Jiinthcr, vi, 'Jiiv,' : LeucieoupygiMnu'De 

 K;iy, Ni'\v V..1-U Fauna. KMirs. -Jl 1: / '/// hrn /<//.'/""< Jordan, 15nll. U. 8. Nat. Mus. x, 53; 

 the casl'Tii lonn, ;i_i/.'/ '"'". "Dually sliglitly diUVriiig in proportionB.) 



166. DA I, I.I 4 Bean. 



(Bean, Proc. U. S. Nat. Mus. 1H70, 358: typo Dtillia pcctorali* r.can.) 



Body oblong, covered with small, partly embedded cveloid scales; a 

 trace of lateral line; a line of mucous tubes below eye. Eye small. 

 Cleft of mouth moderate. Yilliform or almost cardiform teeth on jaws, 

 vomer, and palatines; those on preinaxillaries enlarged. Veutrals in 



