114 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



Distribution (fig. 9) . — Entomacrodus chiostictus is restricted to the 

 eastern Pacific ocean. It lias been collected as far north as the northern 

 end of Isla Angel de la Guarda in the Gulf of California but is apparent- 

 ly uncommon north of Isla Cerralvo. It is not reported from the west 

 coast of Baja Cahfornia or the mainland coast of Mexico north of 

 Mazatlan. It is known to reach as far south as Punta Galero, Oaxaca, 

 on the Mexican coast but is not reported from the rockless area between 

 this locality and Playa Muerto, Panama (see Springer, 1959, for 

 this "Pacific Central American Faunal Gap")- The southernmost 

 specimens come from Pin as Bay, Panama. E. chiostictus is recorded 

 from the following major offshore islands: Tres Marias, Revillagige- 

 dos, Clipperton, Cocos. 



Material studied. — Mexico: Gulf of California, Isla Angel de la Guarda: 

 UCLA W59-183; Baja California, Cape San Lucas and vicinity: ANSP 90806, SU 

 18973, 18974, UCLA W52-263, W59-248, W61-35; Sinaloa, MazatMn: USNM 

 28117 (lectotype of S. chiostictus), 120934, 200284; Islas Tres Marias: SIO 62-16, 

 UBC 59-202, 61-142; Islas Revillagigedos, Socorro: SIO 57-134, SU 5885, 

 UCLA W53-350 (now CAS), USNM 67572, 126986; Roca Partida: SIO 60-385; 

 Clarion: BMNH 1898.19.29.64-65, CNHM 1786, LACM 1132, SU 2673, UBC 58- 

 383, 59-254, USNM 54501; Colima, Ensenada Carrizal: UCLA W56-231; Nayarit, 

 Chacala: UCLA W58-2, W.58-5; San Bias: UCLA W58-30; Sayula: UMMZ 

 172089; Guerrero, Isla Grande: UBC 54-50, 61-130; Acapulco: CNHM 63903; 

 Oaxaca, Punta Galero: SU 37572; Clipperton Island: ANSP 90026, SU 51230, 

 USNM 177784, 181273; Islas Cocos: MCZ 28695 (holotype of E. cruentatus), 

 UCLA W58-378; Panama, Playa Muerto: ANSP 70070 (holotype of S. vander- 

 hilti), 70071, 70072, 70073; Piiias Bay: ANSP (Araosy station 13). 



Entomacrodus votnerinus (Valenciennes) 



Plate 21 

 Salarias vomerinus Valenciennes, 1836, in Cuvier and Valenciennes, Hist. Nat. 

 Poissons, vol. 11, p. 349 [near Bahia, Brazil]. 



Description. — Segmented dorsal fin rays 15-17 (16 in 80 percent of 

 specimens); segmented anal fin rays 15-18 (17 in 76 percent of speci- 

 mens 15 in only 1 of 126 specimens); posteriormost anal pterygiophore 

 supporting 1 or 2 external elements (2 in 88 percent of specimens); 

 total gill-rakers on first arch 16-24 (19-24 in 74 percent of specimens); 

 pseudobranchial filaments 5-8 (6 in 75 percent of specimens), number 

 not increasing with increase in SL; vertebrae 34-36 (35 or 36 in 85 per- 

 cent of specimens); supraorbital cirri 4-15, number increasing with 

 increase in SL (table 51), main, or longest supraorbital cirrus with 

 most branches mesially, frequently with 1 or 2 branches laterally; nape 

 with 1 cirrus on each side; predorsal commissural pores 3-16 (usually 

 less than 11), number tending to increase with increase in SL (table 

 52); preopercular series of pores with all positions simple in 97 percent 

 of specimens (only 3 specimens with 1 pair, and 1 with 2 pairs of pores 

 included in series); 1 pore before each anterior nostril; lateral line 



