NO. 9 



NEW DEEP-WATER FISHES MYERS 



II 



fin. Barbels slender, with filamentous tips, the outer compound ones 

 at each side of lower jaw long, nearly twice horizontal diameter of 

 orbit. 



Measurements of holotype in millimeters: Standard length (hyp- 

 ural to tip of premaxillary) 185.0, greatest body depth 35.0, head 

 length (minus rostral processes, on ideal axis) 92.5, depth head at 

 middle of pupil 33.5, width head (at posterior termination of flanges) 

 64.0, length orbit 17.0, depth orbit 12.0. least width of snout (at outer 

 margin of base of rostral processes) 30.5, width between bases of ros- 

 tral processes 20.0, greatest distance between outer margins of distal 



Fig. 2. — Peristcdion bartschi. Holotype, U.S.N.M. no. 93186. Drawing of upper 

 surface of head, by Mary Wallach. Natural size. 



parts of rostral processes 41.0, length rostral process 26.0, width rostral 

 process 4.5, interorbital 18.0, snout length including rostral processes 

 (on ideal axis) 50.5, premaxillary tip to dorsal origin (on ideal axis) 

 62.5, premaxillary tip to anal origin (on ideal axis) 95.5, premaxillary 

 tip to anus (on ideal axis) 87.0, length base first dorsal 26.0. length 

 base second dorsal 70.0, length base anal fin 62.5, length (greatest) 

 anterior ventral thoracic plate 30.0, width anterior ventral thoracic 

 plate (one, not both) 14.0, length outer (longest) barbel 30.5. 



Coloration pale (red in life), mottled and marbled all over upper 

 surface and sides of body and head with dark brown. First dorsal fin 

 with a black border. Pectoral dark with many light spots. Caudal 

 mottled with dark. 



Only the type known. 



