50. UMBRIDiE. 349 
vertebrate animals known, found in the fresh waters of the warmer 
parts of America. (Dedicated to Charles Girard.) 
569. CJ. formosats Grd. 
Body short. Snont very short. Anal smaller than dorsal. Brown- 
ish olive, with a black streak from the snout along the middle c£ the 
side, crossed by C or 8 brownish-black vertical streaks ; a black spot at 
bases of caudal, dorsal, and anal. Head 3^; depth 3|. D. 7 ; A. 9; 
Lat. 1. '28. L. 1 inch. South Carolina to Florida ; said to be the small- 
est known fish. 
(Girard, Proc. Acad. Nat. Sci. Phila. 1859, 62; Giiutlier, vi, 354.) 
570. d. occadOBitaSas (B. & G.) Grd. 
Brownish above, with a black lateral stripe ; a black line along lower 
margin of tail. Fins unicolor. Head 3| ; depth 3f . D. 7 ; xA. 7. Gila 
Basin. {Girard.) 
(Heterandria occidentalis B. & G.. Proc. Acad. Nat. Sci. Phil. 1853, 390; Girard, U. 
S. Mex. Bound. Ichth. 73 ; Giinther, vi, 354 : Girardinus sonoriensis Girard, Proc. Acad. 
Nat. Sci. Phila. 1859, 120 : Girardinus sonoriensis Gunther, vi, 355. ) 
Family L. — TTMBRTDTF. 
{The Mud Minnoics.) 
Body oblong; broad anteriorly; compressed behind. Head large, 
flattened above^ Month moderate, tbe maxillary without distinct sup- 
plemental bone. Bauds of villiform or cardiform teeth on premaxil- 
laries, lower jaw, vomer, and palatines ; premaxillaries not protractile. 
Lateral margin of upper jaw formed by the broad, short maxillaries, 
which are toothless; lower jaw the longer. Gill-openings wide; the 
membranes scarcely connected ; gill-rakers little developed ; brauchios- 
tegals 6-8. Scales moderate, cycloid, covering head and body ; lateral 
line obscure or wanting. Dorsal fin moderate, posterior, in advance of 
anal ; ventrals small, close to anal ; pectorals inserted low ; caudal fin 
rounded. Stomach without blind sac; no pyloric coeca ; pseudobranchioe 
hidden, glandular ; air-bladder simple ; oviparous ; sexes similar. Car- 
nivorous fishes living in mud or among weeds at the bottom of clear 
sluggish streams and ponds, extremely tenacious of life, like the Cypri- 
nodontidoe. Genera 2 ; species 3, Umbra crameri of Austria, and the 
following. The family is very close to the EsocidWy differing mainly in 
the smaller mouth and weaker teeth. 
{Umbridce Gunther, vi, 231, 232.) 
