690 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
roof of mouth behind vomer; they are directed forward, their tip reaching base of anterior teeth; 
gill-rakers nearly obsolete, 4 or 5 very short movable ones next the angle. 
Dorsal fin beginning on snout immediately above anterior nostril; first ray inserted very slightly 
toward right side of ridge; anterior rays joined by membrane at base only, succeeding rays exserted 
progressively less; the first ray is longer than any of those that immediately succeed it, these decreasing 
rapidly to fifth or sixth ray, then slowly lengthening, the longest rays at beginning of posterior third 
of fin; anal fin similar, without anterior lobe; caudal lanceolate; the anterior two-fifths of base of left 
ventral lying between interopercles, the base lying along pre-anal ridge, its posterior membrane very 
short, attached immediately behind last ray, leaving a long free space between ventrals and first anal 
ray; left pectoral long, about two-thirds length of head; right pectoral shorter than diameter of pupil. 
Scales minute, everywhere cycloid; rays of caudal fin accompanied by series of scales, other fins 
naked; lateral line equally and similarly developed on both sides, the anterior curve short, rather low, 
flat-topped, its chord contained 6 times in straight portion of lateral line. 
Color very light brownish olive, everywhere coarsely flecked with light brown; peritoneum blue- 
black, the color visible through the thin abdominal walls; three irregular dark blotches, with black 
centers shading into brown, lie along lateral line, the first small, just behind curve of lateral line, the 
second and longest in advance of middle of straight portion, the third near tail; dorsal and anal 
finely mottled, with a series of inconspicuous large brown spots along basal half; caudal membrane 
blackish; left pectoral dusky. 
The stomach was distended with the partially digested remains of some fish. Only the type is 
known. The species differs strikingly from C. lugubris Alcock (Jour. As. Soc. Beng., vol. 63, 1894, p. 
129, pi. 6, fig. 4), from the Bay of Bengal, 145 to 250 fathoms, in the shape of anterior curve of 
lateral line. In C. lugubris the anterior portion of lateral line is sharply angulated above base of 
pectorals, while in C. prorigera there is the flat-topped curve common among species of Platophrys. 
Pelecanichthys crumenalis Gilbert & Cramer. 
This most peculiar flounder was taken sparingly on sandy and muddy bottom at depths of from 
238 to 344 fathoms. It was found only in the Pailolo Channel anfi its approaches, and in the southerly 
continuation of the Kaiwi Channel, where it was originally obtained. Its food consists of shrimps and 
other small Crustacea. The genus is probably most closely related to Chascanopsetta Alcock. 
Taken at the following stations: Nos. 3839, Pailolo Channel, 259 to 266 fathoms; 3865, Pailolo 
Channel, 256 to 283 fathoms; 3866, Pailolo Channel, 283- to 284 fathoms; 3867, Pailolo Channel, 284 to 
290 fathoms; 3884, Pailolo Channel, 284 to 290 fathoms; 3907, off the south coast of Oahu, 304 to 315 
fathoms; 3908, off the south coast of Oahu, 304 to 308 fathoms; 3909, off the south coast of Oahu, 308 
to 322 fathoms; 3910, off the south coast of Oahu, 311 to 337 fathoms; 3911, off the south coast of 
Oahu, 337 to 344 fathoms; 3920, off the south coast of Oahu, 265 to 280 fathoms; 4083, off the north 
coast of Maui, 238 to 253 fathoms; 4097, Pailolo Channel, 286 fathoms. 
Pelecanichthys crumenalis Gilbert & Cramer, Proc. U. S. Nat. Mus., XIX, 1897, 433, pi. xlvii. 
Family SO LEM. 
Symphurus undatus, new species. Plate 98. 
Type, 105 mm. long, from station 4114, off the northwest coast of Oahu, depth 154 to 195 fathoms; 
type, No. 51619, U. S. Nat. Mus. 
Head 4.85 in length to base of caudal; depth 3.28. D. 97; A. 87; Y. 4; C. 14; series of scales 
downward and backward, counted along middle of sides, 113. 
Body of moderate depth, with a narrow truncate caudal base; mouth greatly curved; maxillary 
reaching vertical from middle of lower eye; eyes very close together, upper slightly in advance; pos- 
terior two-thirds of interorbital space occupied by a rather irregular patch of scales which encroach on 
eyes; between anterior portions of eyes, the usual broad flap, beneath which opens posterior nostril; 
anterior nostril in a long tube immediately above upper lip, and slightly nearer lower eye than 
extremity of snout; on blind side, the anterior nostril tube is the shorter; posterior nostril slit-like, at 
upper end of a vertical fold which runs upward from a point in front of angle of mouth. 
