i7S 



V 110 B DAT A. 



{Luta* burbot), all are marine. The ClADiDiE, with Gadus,^- in- 

 cluding the cod and haddock, and the 

 Pleueonectitj.e, with Hippoglossvs."' 

 the halibut and other genera, the floun- 

 ders, turlxjt, and sole, make this the 

 'iV most important group of marine fishes. 

 The Pleuronectidffi, from their asym- 

 metry, need a word. The young are 

 jjerfectly symmetrical, but the animals 

 turn on one side, the lower becoming 

 white. The eye of this side gradually 

 works over to the upper side, twisting 

 the bones of tlie skull in its progress. 

 Order V. Lophobranchii. 

 A small group of marine species, 

 having in common gills composed of 

 small rounded tufts, the body covered 

 with a segmented armor of bony plates 

 and peculiar breeding habits, the male 

 carrying the eggs and young in a brood 

 pouch. The sea horses. Hippocampus * 

 with their horse-like heads, and the 



Fto 607 -Hippocannms he.vta- slender pipe fishes, Siinqnathiis* belong 



Qonut,* sta horse. (After ^ ^ ^ j j ^ o 



Goode.) here. 



Order VI. Plectognathi. 



A small grouji of peculiar compact fishes, in which the bones 

 in each jaw are coossified, the ventral fins reduced or absent. In 

 the trunk fishes, Ostracodermi, the body is enclosed in a firm angu- 



FiG. fW.— Chill imw'tcrus yfomifM'i'iis,* swull lisli. (Aftfi- (inodo.l 



lar box of bony plates. The Gymnodonta, or swell fishes (fig. 60S), 

 have the power of inflating the body to spherical sacs. The flesh 

 is poisoiu)us. 



