388 PHILOSOPHY OF ZOOLOGY. 



(bb.) Destitute of a sucker. 



(I.) Head covered with naked skin or minute scales. 



60. Gadus. The ventral fins are jugular and pointed. 

 Gill-flap of seven rays. This extensive genus has been 

 subdivided into, 1. Morrhua (G. morrhud), 2. Merglan- 

 gus {G. merlangns)^ 3. Merluccius (G. merlucc'ius), 4. 



" Lotus (G. lota)y 5. Gadus (G. mustda), 6. Brosma (G. 

 brosme), 7. Phycis {Blennius phycis), 8. Batrachoides 

 (G. raninus, Muller). 



(II.) Head covered with hard scales. The scales of the 

 head in the two first genera are irregular, while on the third 

 they are in the form of polygonal plates, similar to those 

 on the head of serpents. 



61. Lepidoleprus. The ventral fins jugular. The 

 suborbitar and nasal bones united to form a snout, under 

 which the upper jaw still executes its motions. L. tracliy- 

 rJiinclms of Risso *. 



62. Macrourus. Ventral fins thoracic. Under lip 

 bearded. M, rupestres of Bloch., t. 177. 



63. Ophicephalus. Head depressed. Gill-flap with 

 five rays. O. punctatiis. 



b. Sides dissimilar. One side, in some the right, and in 

 others the left, represents the back, and another the belly, 

 on the latter of which they rest. The eyes are on the dor- 

 sal side. 



64. Pleuronectes. With pectoral fins. This genus 

 includes, 1. Pleuronectes (P. platcssa)^ 2. Hippoglossus) 

 (i?. hippoglossus) f 3 .Rhombus {P. maa:i7nns'f), 4. Solea 

 (P. solea). 



• " Ichthyologie de Nice," Paris, 1810, p. 197. tab. vii. f. 21. 

 •h A figure of Rhombus punctatus, from a Scottish specimen, is given in 

 Plate III. f. 2. 



