REVISION OF PORICHTHYS— HUBBS AND SCHULTZ 475 



26. Photophores very numerous, developed in rows generally following the 

 courses of lateral lines.^ 

 3&. Teeth of palatine and premaxillary directed slightly backward In adults 

 of both sexes ; those of palatine numerous and not confined to front of 



bone. Southern Alaska to Colombia Porichthys 



46. Dorsal and anal fin free from caudal. Pectoral fin pointed medially. 

 Peritoneum blackish in adults. Lateral line organs, especially of 

 dorsal and anal series, fimbriate. Photophores of minute size de- 

 veloped above and below some of the accessory dorsal lateral line 

 organs. 

 5a. Branchiostegal rows of photophores with a U-shaped forward-di- 

 rected commissure, not markedly constricted at base. Palatine 

 teeth large, needle-shaped canines. 

 6a. Body v,-ith dusky dorsal saddles in young; becoming plain with 

 age. Top of head unmarked. Dorsal fin usually more or less 

 blotched with dusky. Anal fin definitely margined with dusky 

 to blackish (except in young). Pleural row of photophores end- 

 ing abruptly above end of second third of anal base, behind end 

 of pleural lateral line. Anal rays 33 to 37, usually 34 to 36. 

 Dorsal rays 36 to 38. Southern California and outer coast of 



Lower California, close to shore Porichthys myriaster 



56. Branchiostegal rows of photophores united in a broad V, without 

 forward projection. Palatine teeth small, somewhat compressed. 

 66. Body with weak dorsal saddles in young, usually very weak; be- 

 coming plain with age. Top of head unmarked. Dorsal fin 

 plain, or with a dusky edge, as a border or in spots. Anal fin 

 more or less darkened, but usually without dark margin, or 

 with a merely dusky l)order. Pleural row of photophores ending 

 abruptly above end of second third of anal base behind end of 

 pores and cirri of pleural lateral line. Anal rays 29 to 34, 

 usually 31 to 33. Dorsal rays 33 to 36, usually 35. Alaska to 

 Cape San Lucas; in rather deep ivater south of Point Conception. 



Porichthys notatus 

 6c. Body with 8 rather strong and persumably persistent, broad, light- 

 brown dorsolateral bars, without light centers; without smaller, 

 alternating spots. Top and sides of head unspotted. Dorsal fin 

 with a row of 7 marginal light-brown blotches (separated by 

 light areas from the body bars). Anal fin whitish, with a dusky 

 brown border. Pleural row of photophoi-es not ending above 

 end of second third of anal base but continued backward (as 

 smaller organs) nearly to end of fin; pleural lateral line (pores 

 and strong cirri) extending to caudal fin. Anal rays 36. Dorsal 



rays 38 or 39. Gulf of California Porichthys analis 



6d. Body with strong and persistent dorsolateral blotches, often with 

 light centers ; with smaller, alternating spots in adult. Top and 

 sides of head (and humeral region) definitely spotted with dark. 

 Dorsal fin with a row of marginal black spots or blotches. Anal 

 fin white or dusky to margin. Pleural row of photophores not 



»The arrangemeut of the photophores of Porichthys is described and figured in great 

 detail and accuracy by Greene (1899), whose account was abstracted by Jordan and Ever- 

 mann (1898, pp. 2317-2318) and partly quoted by Jordan (1905, vol. 1, pp. 190-197). 



