112 TBLEOSTEI : ACANTHOPTERI. — XX. 



145. STROMATEUS (Artedi) Linnseua. (orptafiarcvc, ancient 

 name. ) 



a. Pelvis ending in a small spine; V. wanting. 

 b. D. and A. little falcate, their lobes shorter than head; a row of con- 

 spicuous pores along side of back above lateral line. (Poronotus Gill.) 



292. S. triacantbus Peck. Dollar-fish. Butter-fish. 

 Bluish ; silvery below ; body oval, compressed ; snout very blunt. 

 Head 4 ; depth 2^. D. Ill, 45. A. Ill, 37. L. 10. Maine to 

 Florida, common N. (rpis, three ; axavOa, spine.) 



bb. D. and A. falcate, their lobes longer than head ; back without evident 

 pores. (Rhombus Lac^pfede.) 



293. S. paru L. Harvest-fish. Bluish, yellow below, body 

 almost round, with vertical snout. Head 4 ; depth Ij. D. Ill, 45. 

 A. II, 43. L. 8. Cape Cod to S. A., rare N. (Brazilian name.) 



Family LIX. CORYPH^NIDiB. (The Dolphins.) 



Body elongate, compressed, with small, cycloid scales; mouth 

 wide, with moderate teeth ; opercles entire ; occipital crest extend- 

 ing well forward, becoming very high in the adult ^. D. contin- 

 uous from nape nearly to C, without distinct spines; A. similar, 

 shorter; V. I, 5 ; P. short; C. widely forked. Gill openings wide. 

 No pseudobranchiEB nor air-bladder. Vertebrae more than 24. One 

 genus, with 2 or 3 species ; large vigorous fishes of the open seas. 

 The bright coloration grows pale at death, but the accounts of this 

 change have been much exaggerated. 



146. CORYPH.a!NA (Artedi) Linnaeus. (xcJ/jur, helmet j 

 (pc[va>, to show.) 



294. C. hippurus L. Common Dolphin. Dorado. Very 

 bright olive-green, with small round blue spots ; V. inserted slightly 

 behind upper ray of P. Head 4| ; depth 4-J- ; V. 1^ in head ; P. 1-J. 

 D. 59 to 63. A. 29. L. 3 to 5 feet. Open sea, N. to Cape Cod, 

 abundant S. (wTTrof, horse; ovpa, tail.) (£«.) 



With the Dolphins, we close the series of fishes having Scombroid 

 affinities, and begin the equally important series of PERCI- 

 FORMES, those related in some degree to the common Perch. 

 The Perch-like fishes have usually larger and rougher scales than 

 the Scombroids, and the development of the spinous armature of 

 the fins is in general more pronounced. We begin with one of the 

 most aberrant forms, the small 



Family LX. APHRBDODERID^. (The Pirate 

 Perches.) 



Body oblong, with thick, depressed head and compressed tail; 

 mouth moderate, the chin projecting ; teeth in villiform bands on 



