2140 Bulletin 4.7, United States National Museum. 



dd. Pectoral fin more or less deeply notched, not divided to base. 



e. Lower jaw projecting. P. 16; D. 57; A. 43; head 5| in length; 

 depth 5|. MENTO, 2475. 



ee. Lower jaw included. 



/. Pectoral rays 31; head 6 in length; depth 6. D.65; 



A. 55. COPEI, 2476. 



ff. Pectoral rays 30; head 5 in length; depth 6i. D. 56; 



A. 46. DACTYLOSUS, 2477. 



HlLGENDORFIA : * 



act. Insertion of pectoral very high, its upper rays ahove pupil; lower jaw included; 

 pectoral fin notched; gill opening small; head 5; depth 5. D. 65; A. 60; 

 P. 25. ULOCHIE, 2478. 



Subgenus PARALIPARIS, Collett. 

 2472. PARALIPARIS HOLOMELAS, Gilbert. 



Head about 5; depth about 6; eye 3f. D. 58 to 61; A. 54. Head very 

 large and heavy, with very broadly rounded snout, and much swollen 

 occipital and nuchal regions, the highest point over upper opercular 

 angle, from which point the profile descends rapidly backward, though 

 much less so than in P. cephalus. Snout very blunt, evenly rounded, very 

 slightly projecting beyond the mouth, its width equaling length of snout 

 and eye, -J- length of head; eye f interorbital width; mouth large, 

 horizontal, quite at lower side of snout, entirely below the eye; max- 

 illary reaching a vertical slightly behind posterior margin of orbit, If in 

 head; teeth acute, arranged in oblique series in each jaw, forming a very 

 narrow band in mandible, a broader band in upper jaw; very large 

 mucous slits on head, 5 forming a series from tip of snout below eye and 

 across cheek, 6 along mandible and preopercle; gill slit wide, extending 

 from above opercular flap nearly to middle of base of pectorals, its length 

 2 in that of head; opercle forming posteriorly a narrow angular flap, 

 projecting above base of pectorals; no pseudobranchia? ; vent below oper- 

 cular flap, or somewhat in advance of that point, nearer to base of pec- 

 torals anteriorly than to first anal ray; pectorals inserted very low, the 

 base of upper lobe vertical, the base of notch and lower lobe horizontal, 

 the upper end of base below the level of the eye ; pectorals with 2 wholly 

 distinct lobes, the interspace without free membraiiaceous margin, the skin 

 of abdomen directly continuous at this point with that of shoulder girdle. 

 On dissecting off the integument, however, the interspace between the 

 lobes is seen to be provided with 2 or 3 short, widely spaced rays, as in 

 all other species examined by us ; upper lobe long, reaching beyond front 

 of anal, the rays close set, 18 in number, included in the membranes to 

 their tips; lower lobe consisting of 5 or 6 slender, almost filamentous 

 rays, the longest reaching front of anal, all of them free to the base, 

 without connecting membrane; anterior (lower) ends of shoulder girdle 

 approximate, the rays separated by a distance equaling diameter of 

 pupil; dorsal beginning above base of pectorals. Color uniformly black, 

 including fins and lining of mouth and gill cavity. Closely allied to P. 



* Named for Dr. Franz Hilgendorf, ichthyologist of the University of Berlin. 



