NO. 5 MYERS AND WADE : ATHERINID FISHES 131 



? Eurystole eriarcha {nee Jordan and Gilbert) Osburn and Nichols, 

 1916, p. 156 (Cape San Lucas, and Santa Catalina Island, Gulf 

 of California). — Breder, 1936, p. 6 (San Jose del Cabo, Baja 

 California). 



//o/o/j'/.^.— Stanford 37060. 



Type loeality. — Off Arroyo de San Luis, Baja California, 23° 10' 

 30" N., 109° 27 45'' W., March 7, 1939, dip-net under electric light 

 from A^. B. Scofield at anchor in 5 fms, R. L. Bolin, collector. 



Paratypes. — Stanford 37061 : 10 specimens,^ 63-76 mm, same data 

 as holotype. — 37062: 3 specimens, 62.5-64 mm, Santa Cruz Bay, Oaxaca, 

 Mexico, 15° 45' N., 96° 07' 20" W., March 14, 1939, dip-net under 

 electric light from N. B. Scofield at anchor in 8 fms, R. L. Bolin, collec- 

 tor. — 37063 : 1 specimen, 72.5 mm, off Fortuna Ranch, Baja California, 

 23° 08' N., 109° 30' W., March 5, 1939, dip-net under electric light 

 from N. B. Scofield at anchor in 8 fms, R. L. Bolin, collector. — 2689: 

 1 specimen, 56.5 mm, Mazatlan, Mexico, taken with a seine on a sandy 

 beach south of the town, Hopkins Expedition of 1895. 



Range. — Lower California to Oaxaca. 



Measurements of holotype i?i mm. — Standard length 76.5, depth 

 15.3, head length 16, head width 8, eye 5.5, interorbital 5.5, snout 4.9, 

 caudal peduncle length 15.5, caudal peduncle depth 6.5, tip of snout to 

 anal origin 41, anal origin to caudal base 35, predorsal length 39, origin 

 of first dorsal to caudal base 37, caudal base to origin of second dorsal 

 25, postorbital length 6.1, pectoral length 12.3. 



Description. — Body elongate, compressed, deep anteriorly, tapering to 

 a narrow caudal peduncle, depth 4.42-5.22 in standard length. Dorsal 

 outline of body only slightly curved, much flattened before first dorsal, 

 a definite break in the dorsal contour at origin of second dorsal. Ventral 

 outline more strongly curved than dorsal, curve of abdomen flattened, 

 almost horizontal. Abdomen compressed, but not sharply so, preventral 

 edge thinly rounded, not keeled. Caudal peduncle length (from last anal 

 ray to middle of end of hypural fan) 4.5-5.45 in standard length, caudal 

 peduncle depth 2.3-2.39 in its length. 



Sides of head and body scaled; 58-63 scales in a lateral series from 

 above gill-opening to caudal base. Predorsal scales along mid-line of 

 back 23-27. Scales around caudal peduncle 16 or 18, preventral scales 

 about 17. Base of caudal fin scaled. Distal row of scales of anal sheath 



4 One of these paratypes has been sent to the U.S. National Museum, and two 

 will be deposited in the Hancock Foundation. 



