DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 451 



The Sialcs mi tin- I'vi'il side air regularly cycloid with the Ducleus some distance from 

 the posterior margin and with numerous radiating striae. The gill rakers arc quite charac- 

 teristic. 



CYCLOPSETTA I'lM I'.KIATA, Goode and Bean. (Figur©368.) 

 Hemirhombua fimbriatus, Goode and Beak, Proo. U.S. Nat. Mum., viii, IS85, ">!il. 



Body elliptical; its height (10- millimeters) nearly hall tin- body length. 



Scales cycloid, about 70 in the Longitudinal scries, 25 or 26 in the vertical scries above 

 the lateral line, .'!l below. The lateral line is slightly curved over the pectoral, the length 

 of the arc of the curve contained 3J times in its straighl portion. Vertical tins ao1 scaly. 



Length of head (61 millimeters) about 3i times in standard length. Length of snont 

 (11.4 millimeters) ~>\ times in that of head. 



Mouth very large, with upper jaw strongly curved, lower jaw included. The length of 

 the maxillary (30 millimeters) equals half the length of the head. The lower jaw extends 

 behind the vertical through the posterior margin of the eyes; its length (36 millimeters. 

 equal to that of postorbital part of the head, and contained 6 times in the total length) 

 Edge of mandible and margin of suboperculum provided with a pointed Hap of thin integu- 

 mentary tissue. Gill rakers very short, tubercular; about 9 on the anterior arch below the, 

 angle. The upper eye is placed at a distance from the dorsal profile equal to half its own 

 diameter, which is a little more than one-fifth the length of the head, and is equal to that 

 of its mate. Byes in the same vertical and separated by an interspace equal to one-fourth 

 the orbital diameter. Interorbital ridge low. 



Nostrils on the line of the interorbital ridge; the anterior is equidistant from the tip' 

 of the snout and the margin of the upper eye; it is in a very inconspicuous tube, provided 

 with a slender filament about one-third the length of the snout. The posterior nostril is 

 separated from the anterior one by a space equal to one-fifth the length of the snout. 



Teeth uniserial in both jaws, some of the anterior ones in the upper jaw being much 

 larger than those following, while those in the lower jaw are still larger than these. Some 

 of the teeth in each jaw are depressible. 



The dorsal fin begins on the snout, in advance of the nostrils; the first ray longer than 

 the second. The longest rays are behind the middle of the fin, their length (26 millimeters) 

 one fourth the height of the body. Eighty rays compose the fin. 



The anal fin begins under the axil of the pectoral. Its longest rays behind its middle, 

 their length (•">() millimeters) greater than that of longest dorsal rays. It contains 00-01 rays. 



Caudal with middle rays produced, the length of the median rays (45 millimeters) 

 contained 4' in total length. 



The greatest length of the pectorals (39 millimeters) is contained 5| times in total 

 length. 



The ventral of the colored side is on the ridge of the abdomen, on a line with its mate, 

 which is slightly removed from the median line. Its distance from snout (56 millimeters) a 

 little more than one-quarter the length of the body. Its length (23 millimeters) equal to 

 half the length of median caudal rays. The ventral of the blind side is continued by 

 a thin membrane to the vent, which is slightly distant from the edge of the abdomen, and 

 behind the origin of the anal. 



Color, grayish brown; the dorsal and anal fins each with two roundish dark blotches 

 upon their posterior halves, which are slightly larger than the eye. A similar dark blotch 

 upon the, middle of the caudal, sometimes with smaller blotches irregularly placed near its 

 outer margin. 



Pectoral, with a very narrow dark band near its base; the whole of its outer half is 

 marked by a dark blotch, reticulated and mottled with lighter; the intervening portion is 

 pearly white, with dark specks upon the rays. Blind side cream colored. 



D. 80; A. 60-61; P. 10; V. 6; C. 16. 



The type specimen (Cat. No. .'!7.'!.'5o, I". S. X. M., 213 millimeters long to origin of mid- 

 dle caudal rays), was taken bj the Albatross from station 2-103, in 28° -12' 30" N. lat., 85° 



