NO. 6 MYERS AND WADE: NEW WEST COAST FISHES 161 



dorsal. Membranes of continuous dorsal deeply incised anteriorly. Soft 

 dorsal higher than the spines. Anal fin long, continuous, its origin beneath 

 third spine of continuous dorsal. 



Although Heteristtus somewhat resembles both Gillellus and 

 Cokertdia, it may be separated from those genera by the greatly increased 

 number of dorsal spines, by the fewer dorsal rays, by having the abdomen 

 scaled across ventral mid-line before vent, and by the manner in which the 

 anterior dorsal spines are separated from the continuous dorsal fin. In 

 addition, this genus may be distinguished from Gillellus by the much 

 shorter arch of the lateral line and the greater development of the labial 

 fringe, especially on the upper lip. From Cokeridia (see Meek and 

 Hildebrand, 1928, p. 905; and Reid, 1935, p. 163) it differs also in the 

 much more conical head, in the more nearly horizontal mouth, and in not 

 having eyes placed on the ends of short, retractile eye stalks. 



Heterlstius jalisconis, new species 

 Plate 21, fig. 4 



Holotype. — ^AHF no. 914. 



Type locality. — Station 763-38, off Black Rock, south of Cape Cor- 

 rientes, Jalisco, Mexico (19° 57'N, 105° 32'W), dredged in 5 to 10 

 fms, sand and broken shell bottom, Januaiy 7, 1938. 



Paratypes. — AHF no. 915. Station 765-38, 3 specimens, 30.5 to 

 36 mm, Chacahua Bay, Oaxaca, Mexico, dredged in 5 to 10 fms on sand 

 and shell bottom, January 9, 1938; one of these now in the Stanford 

 Natural History Museum. 



Measurements of holotype in mm. — Standard length 40.5, depth 7, 

 head 10, head width 7.5, eye 2, snout 1.9, maxillary 4, interorbital 0.85, 

 predorsal 8, preanal 13.5. 



Description. — Posterior dorsal ray not joined by membrane to caudal 

 base. Predorsal length 4.88 to 5.1 in standard length. Anal fin II, 34 or 

 35, origin under third spine of continuous dorsal. Similar to dorsal, last 

 ray not joined by membrane to caudal base. Preanal length 2.9 to 3 in 

 standard length. Caudal fin rounded, with 14 articulated rays. Pectoral 

 rays 13, middle rays longest, extending backward to beneath twelfth or 

 thirteenth spine of continuous dorsal. Ventral fins I, 3, inserted beneath 

 first two dorsal spines. Membrane of subopercle and interopercle 

 expanded and covering throat, and bases of pectoral and ventral fins. 



Scales 50-52 in a lateral series. Body entirely scaled, scales absent on 

 head and fins. Abdomen scaled across ventral mid-line before anal 



