230 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



CENTROPHORUS NILSONI Thompson 



Centrophorus nilsoni Thompson, Rec. Canterbury Miis., vol. 3, No. 4, p. 276, pi. 

 44, figs, a-i, 1930 (type locality: Deep water off Kaikoura). — Whitley, 

 Mem. Queensland Mus., vol. 10, pt. 4, p. 200, 1934 (reference). 



Depth 534 to origin of lower caudal lobe ; head to first gill opening 

 5, width ll^. Snout 3% in head; eye 3%, subequal with snout, 2 in 

 interorbital ; mouth width 2i/^ in head to first gill opening, little 

 curved; labial folds extend I/3 along both upper and lower jaws, and 

 backward projection from angle same length; upper jaw w^ith 4 

 rows of lanceolate teeth bearing lateral extensions near base, while 

 almost straight up and doAvn in front take distinct slope toward 

 angle of mouth at sides of jaw; lower teeth in 2 rows with inner 

 lateral edges deflected over to form cutting edge of tooth till at 

 angles of 20° with jaw and median tooth present in outer set ; inter- 

 orbital l%o ill head to first gill opening, low. Gill openings increase 

 in size posteriorly so last nearly twice long as first. Spiracle long, 

 wide, above and well behind eye. 



Body covered with smallish leaf-shaped scales, mostly with one 

 strong median and 2 less marked lateral keels. In most of scales 

 keels end in lobes, but these absent on part of snout. 



First dorsal length from spine 1 in head to first gill opening, fin 

 base 2 in interorbital space, moderately high; second dorsal length 

 1% in head to first gill opening, moderately high, fin extends % 

 caudal length; both dorsal spines low, largely covered, half fin 

 height; caudal length 3% in rest of fish, subcaudal length 1% in 

 caudal; anal li^, posterior tip reaching below middle of second 

 dorsal ; pectoral ly^ in head to first gill opening. 



Brown on back and sides, very light brown below\ Inside mouth 

 and eye sockets white. 



Length, 103 cm. (Thompson.) 



New Zealand. 



CENTROPHORUS TESSELLATUS Garman 



Centrophorus tessellatus Garman, Bull. Mus. Comp. ZooL, vol. 46, p. 205, 1906 

 (type locality: Lat. 35° N., long. 139° 30' E., in 400 fathoms).— Regan, Ann. 

 Mag. Nat. Hist, ser. 8, vol. 2, p. 54, 1908 (reference). — Garman, Mem. Mus. 

 Comp. Zool., vol. 36, p. 202, 1913 (type).— Fowlek, Proc. 4tli (1929) Pacific 

 Sci. Congr., Java, p. 495, 1930 (reference). 



Body subfusiform, robust; head including gill opening 4 in total, 

 depressed, flattened below and on crown, sides steep. Snout long, 

 broad, bluntly rounded at end; eye large, less than half preoral 

 length, hind end of orbit above mouth; mouth width % of preoral 

 length, little curved, at each angle long deep straight groove with 

 labial folds extends I/3 length of each jaw ; teeth in 41 rows above, 31 

 below, compressed, serrated on basal portions of each cusp; upper 

 teeth erect in middle of mouth, oblique towards angles, each tooth 



