804 Bulletin 47, United States National Museum. 



1174. THYRINA EVERMANNI, Jordan & Culver. 



Head 4f; depth 4 to 5; dorsal IV-I, 7 j anal 1, 23 to 1, 25 ; scales 36-9 ; 

 eye 2f in head ; snout 3| in head ; maxillary 3| in head ; lower jaw 2 in 

 head ; pectoral i longer than head, 3 in body ; caudal slightly longer 

 than head; interorbital space broad, nearly equal to eye. Body much 

 compressed, the belly sharp-edged, concave on each side below pectorals 

 as if pinched together between the fingers, the ribs reaching the edge, 

 the scales passing around it ; the edge almost carinate. Back narrow. 

 Scales smooth, none on dorsal or anal. Mouth small, terminal, the short 

 jaws curved, the structure precisely as in Menidia; the teeth moderate, 

 curved, those in the upper jaw longer ; opercles oblique behind, not ver- 

 tically truncate. Gill rakers numerous, long and slender ; pectorals very 

 long and falcate, reaching to front of anal and beyond tips of short ven- 

 trals, their posterior margin concave; spinous dorsal small, inserted 

 midway between edge of preopercle and base of caudal, about over sixth 

 ray of anal ; last ray of dorsal considerably before last of anal ; base of 

 anal If times length of head, 2f in body. Color light green, much dotted 

 above, translucent below ; a black streak of dots along base of anal ; 

 some on sides of head ; median line of back dusky j fins all pale ; no 

 black on spinous dorsal, ventral, or pectoral; lateral stripe width of 

 eye, underlaid by black ; a large, transparent, window-like space above 

 front of anal, marking the posterior portion of the air bladder. Length 

 2i to 3 inches ; rather common in the estuary at Mazatlan. (Named for 

 Dr. Barton Warren Evermann.) 



Atherinella cvermanni, JORDAN & CULVER, MS., Kept. Fishes Sinaloa, 1895, Mazatlan. (Type, 

 No. 2688, L. S. Jr. Univ. Mus. Cotype, No. 47494, U. S. Nat. Mus. Coll. Hopkins Expedition.) 



1175. THYRINA CRYSTALLINA, Jordan & Culver. 



Head 4f ; depth 4 to 5. Dorsal IV-I, 8 ; anal I, 21 ; scales 40-11 ; pec- 

 toral longer than head, 4 in body ; anal base more than half longer 

 than head, 3 in body; eye 2f in head; snout 3J; maxillary 2; lower 

 jaw 2|. Body rather deep and compressed ; snout shortish ; opercle 

 shortish, rounded behind; mouth small, the upper jaw very protractile, 

 the premaxillary strongly curved ; jaws equal ; teeth rather strong, the 

 outer curved, those in upper jaw largest ; eyes very large, silvery ; 

 breast compressed, as in Thyrina evermanni, but less sharp at edge, appear- 

 ing as if pinched between thumb and finger ; pectoral long, pointed, not 

 truly falcate, reaching more or less past the middle of the short ventrals, 

 its posterior margin not concave, the middle rays considerably more 

 than half length of upper rays ; dorsal and anal naked ; gill rakers 

 numerous, long and slender. First dorsal small, behind front of the long 

 anal, midway between gill opening and base of caudal ; first ray of soft 

 dorsal over about fourth of anal; last rays of soft dorsal considerably 

 before last of anal. Caudal lunate, the lower lobe the longer and broader, 

 as long as head. Color translucent green, with considerable dusky dot- 

 tings, no yellow ; fins dotted ; ventrals black, as are lobes of second dor- 

 sal and anal ; silvery stripe narrow, underlaid by dusky, its width little 



