646 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



punctains. There is, liovrever, no positive evidence that it is identical 

 with the African species, so named by Professor Liitkeu. The Texan 

 species oi MijropMs {lumbricus J. & G.) and the Cuban species {micros- 

 tigmius Poey) seem to be distinct from it. 



Chloroscombrus orqueta sp. uov. (29165, 29278, 29285, 29343.) 

 Mieropttryx chrysurus Steiud., Ichth. Beit. Ill, 61. 

 ChJoroscomhrus chrysurus Jor. & Gilb.,Bull. U. S. Fish. Comm. 1882, 110. 



Proportions, fin rays, and coloration essentially as in G. chrysurus, 

 which species it represents in the Pacific. From the Atlantic form, 

 C. orqueta differs constantly in the much longer curve of the lateral line, 

 and in the distinct armature along caudal peduncle. 



Body ovate, strongly compressed, the edges trenchant. Dorsal and 

 ventral outlines very regularly curved, the curve of the belly consider- 

 ably stronger than that of the back, the axis of body much nearer the 

 latter. Caudal peduncle very slender. Young less elongate than the 

 adult, otherwise very similar in form. 



Head small, rather pointed, the anterior profile nearly straight. Mouth 

 small, very oblique, the lower jaw projecting. Maxillary broad, extend- 

 ing a little beyond front of eye, its length 2f in head, its tipe marginate; 

 supplemental bone well developed. Teeth very small, those of the jaws 

 not villiform, forming very narrow bands or single series in both jaws; 

 villiform patches on vomer, palatines, and tongue. Adipose eyelid well 

 developed. Preorbital veiy narrow, not half width of orbit. Gill-rakers 

 numerous, very long, slender, close set. 



Head nearly naked. Body covered with well-developed imbricated 

 scales; the ventral ridge, and a narrowly triangular area forwards from 

 front of dorsal naked. 



Lateral line with a rather strong arch anteriorly, the chord of the 

 curve being considerably longer than head, and 1^ to If in the straight 

 part. (In C. chrysurus the chord of the curve is about as long as head 

 from tip of lower jaw, and If to If in the straight portion.) A distinct 

 keel along caudal peduncle, the scales of lateral line enlarged and bony 

 with bluntish tips. (In C. chrysurus the scales of lateral line are little 

 if at all different from the other scales.) Dorsal and anal naked, the 

 sheaths at their bases largely developed along the anterior half of each 

 fin. 



Antrorse dorsal spine concealed. Spinous dorsal persistent, the spines 

 slender, the longest slightly shorter than anterior rays of soft dorsal, 

 which are about half head. Soft dorsal and anal with anterior rays 

 highest, the fins not falcate. Caudal widely forked, the upper lobe 

 slightly longer than the lower, which about equals head. Anal spines 

 strong. Pectorals very long, falcate, a little more than one-third length. 

 Ventrals short, about two-fifths head. 



Color somewhat darker than in C. chrysurus. In life, back green 

 with blue reflections; sides and below silvery- white with bluisli and 



