136 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
94. Cypsilurus bahiensis (Kanzani). 
Head 4.67 in length; depth 4.75; D. 14; A. 9 or 10; P. 15; V. 6; scales to base of caudal 50,-14; 
snout 3.5 in head; eye 4, 1.8 in postocular part of head, 1.5 in interorbital space; base of dorsal 5.5 in 
body; base of anal 9; length of ventral 4. 
Body elongate, the sides compressed and flattened; head elongate, subconic; snout moderately 
elongate, flattened- above, and somewhat obtuse; eye anterior, the posterior margin a little behind 
center of. length of head, and the eyelid somewhat adipose in front above; mouth oblique, equal to 
eye, the maxillary reaching below nasal cavity; teeth small and sharp in the jaws, none on vomer and 
palatines; tongue rather small, elongate, somewhat narrow, rounded and free in front; nasal small, 
above and in front of eye, and with a shallow groove leading down in front of the eye, the nasal 
flap thick; interorbital space broad, flattened, or only slightly concave, like the top of the head in 
front; gillrakers in moderate number, rather short, less than the gill-filaments in length; peritoneum 
white; scales large, cycloid; head scaled; lateral line running along the lower part of side, stopping 
behind the anal a few scales before base of caudal; origin of dorsal nearer base of pectoral than tip of 
upper caudal lobe, before the anus, nearer origin of anal than base of ventrals, the anterior rays elon- 
gated; anal similar to dorsal, the anterior rays the longer; caudal deeply forked, the lower lobe much 
the longer; pectoral very long, reaching within a very short distance of the base of caudal; ventrals 
long, reaching well beyond first anal rays; caudal peduncle deep and compressed. 
Color in alcohol, brown above, the sides and lower surface white, washed with silvery; pectorals 
deep brown, more or less margined with white; dorsal with a large black blotch, otherwise pale brown; 
caudal pale brownish; anal and ventrals whitish. 
Described from a gravid female (No. 03567) 19 inches long, taken at Hilo in July. We have 
another example from Hilo and 8 from Honolulu, 3 of the latter taken by Dr. Jenkins in 1889 and 
1 by Dr. Wood. The species is readily recognized in life when skimming over the waves by its 
reddish-brown pectorals. It is common in the sea about Honolulu, but less abundant than C. simus. 
Exocodus bahiensis Ranzani, Nov. Comm. Ac. Sci. Inst. Bonon., V, 1842, 326.pl. 38, Bahia; Gunther, Cat., VI, 293, 1866; Poey, 
Synopsis, 384 and 385, 1868; Lut.ken, Vid. Medd. Naturh. Horen., 402, 1876; Jordan & Evermann, Fishes North and 
Mid. Amer., I. 739, 1896; Steindachner, Denks. Ak. Wiss. Wien, LXX, 1900, 512 (Honolulu). 
Cypsilurus bahiensis, Jordan & Evermann, Fishes North and Mid. Amer., Ill, 2836, 1898; Jenkins, Bull. U. S. Fish Comm., 
XXII, 1902 (Sept. 23, 1903), 436 (Honolulu). 
95. Cypsilurus atrisignis Jenkins. Plate 25. 
Head 4.3 in length; depth 5.5; D. 15; A. 10; P. 14; lateral line about 60; scales before dorsal fin 
34; scales between origin of dorsal and lateral line 9. 
Body elongate, broad dorsally, narrow ventrally, broadest just in front of base of pectorals, where 
it is nearly as broad as the depth; top of posterior portion of head broad, narrowing toward tip of 
snout, somewhat concave between the eyes; interorbital space equaling distance from posterior margin 
of eye to margin of opercle; eye large, its center anterior to center of head; snout less than eye, some- 
what pointed, lower jaw slightly projecting; maxillary included and falling considerably short of 
anterior margin of eye; pectoral reaching tip of last dorsal ray; ventral reaching to one-third the base 
of anal, its origin half way between eye and base of caudal; origin of dorsal much in- advance of vent, 
its distance from first caudal ray 1.4 times head, the longest ray, the anterior one, about 2 in head; 
lower lobe of caudal the longer. 
Color in alcohol, dark purple above, light below; dorsal fin with black spot about 0.7 diameter of 
eye between the eighth and eleventh spines; caudal and ventrals colorless, unmarked; ventrals white, 
without spots; pectoral rays and membranes very dark purple above, the rays light below, the mem- 
branes with black spots on anterior and posterior portions. 
One specimen (No. 197), 13.5 inches in length, was taken by Dr. Jenkins in 1889 at Plonolulu. 
Type, No. 50713, U. S. N. M. Another is in the museum of Stanford University, taken by Mr. A. P. 
Lundin, at Kusai (Strong Island), one of the Carolines. » 
Cypsilurus atrisignis Jenkins, Bull. U. S. Fish Comm., XXII, 1902 (Sept. 23, 1903), 436, pi. 3, Honolulu. (Type, No. 
50713, U. S. N. M., Coll. O. P. Jenkins,) 
