1206 Bulletin 47, United States National Museum. 



Centropristis macropoma, GUNTHER, Proc. Zool. Soc. London, 1864, 145, Panama; G(JNTHER, 



Fishes Central America, 409, pi. LXV, 1869. 

 Diplectrum macropoma, JORDAN & BOLLMAN, Proc. U. S. Nat. Mus., 1889, 157; JORDAN <fe EIGEN- 



MANN,Z. c., 398, 1890. 



1593. DIPLECTRUM EURTPLECTBUM, Jordan & Bollman. 



Head (to end of opercular spine) 2 to 2; depth 3? to 3. D. X, 12; 

 A. Ill, 8 ; scales 8-50 to 55-18. Body moderately elongate, heavy through 

 shoulders; the back not much elevated; anterior profile convex, nearly 

 straight above eyes ; mouth large, maxillary reaching posterior border of 

 eye, 2 in head ; snout blunt, 3f in head ; eye large, slightly shorter than 

 snout, 4 in head. Interorbital space appearing slightly concave, If in eye. 

 Teeth as in D. radiate. Preopercular process very wide, its width 1J times 

 diameter of eye ; spines long and slender, 15 to 20 developed ; the lower 

 angle not so strongly projecting as in D. macropoma. Opercular spine 

 rather sharp, embedded. Opercular flap long and well rounded at the end ; 

 upper end of preopercle midway between tip of snout and opercular flap. 

 Gill rakers rather long, stout as in other species, x -f- 12. Scales small, 

 rather firm, smaller than in other species, 8 or 9 rows on cheeks ; scales 

 on opercle smaller than in D. radiale or D. macropoma, about 12 scales 

 before dorsal. Dorsal spines weak, pungent, second Ig in third, fourth 

 and fifth almost equal, 3i in head; first soft ray 3 in head, shorter than next 

 the last ; upper lobe of caudal longest, 1| to If in head, lower lobe If to If 

 in head ; first anal spine If in second, which is strongest and 1| in third, 

 latter 5 in head; soft rays showing a convex margin, the longest 3 in head ; 

 pectorals broad, their posterior margin truncate-concave, their length If 

 in head; ventrals 1 inhead. Color brownish above, as in D. radiale, become 

 ingmore yellowish and silvery below ; sides with about 5 pairs of interrupted 

 black bars ; a large black blotch at base of caudal ; markings on preorbi- 

 tal and cheeks rather indistinct ; a large black spot above preopercular 

 angle on opercle ; lips bluish ; spinous dorsal dusky above ; a small pale 

 spot under tip of spines ; soft dorsal plain olive, dark at base; inner rays 

 of caudal tipped with dusky, a few lower rays pale ; pectoral and anal 

 pale; ventrals dusky. This species is known from numerous specimens 

 dredged by the Albatross at stations 2795 and 2797, southwest of Panama, 

 at a depth of 33 fathoms, and at station 2805 at a depth of 51 fathoms. 

 The largest of these is about 7 inches long. This species and the preced- 

 ing, of which we have examined many specimens, are well distinguished 

 from Diplectrum radiale, with which Dr. Boulenger has united them. Di- 

 plectrum macropoma is in appearance, coloration, and in habit intermediate 

 between the other two, but the characters of all are well marked, 



Diplectrum euryplectntm, JORDAN & BOLLMAN, Proc. U. S. Nat. Mus., 1889, 157, Pacific Ocean, 

 off coast of Colombia, from 8 06' 30" N., 78 51' W., and 7 57' N., 78 55' W. t 7 

 56' N., 79 41' 30" W., stations 2797, 2795, 2805. (Type, No. 41141. Coll. Albatross.) 



