404 PLEURON^ECTIDiE. 



are the strongest and all separate from one another ; the lower jaw 

 with seven strong, widely-set teeth on each side. Front margins of 

 the orbits on the same level. Fins naked ; the distance of the dorsal 

 from the caudal equals the depth of the free jjortion of the tail ; the 

 longest dorsal rays are in the middle of the fin, their length being 

 two-fifths of that of the head ; pectoral twice as long as the ventral 

 and half as long as the head. No prominent spine before the anal. 

 Gill-rakers short, compressed, triangular, widely set. not half as long 

 as the eye. Yellowish-brown. 



From the British Channel along the coasts of Northern Europe. 

 (? California and coast of Kamtschatka.) 



a. Fine specimen, London market. 



b. Adult : stuffed. British. 



c. Adult : stuffed. Frith of Forth. 



d. Adult: stuffed. Devonshire. Presented byLieut.H.F.Spence, R.N. 



e. Half-grown : skin. From Gronow's Collection. 

 /. Skeleton, 5 feet long. 



2. Lateral line not cui-ved. 



2. Hippoglossus grcenlandicus. 



Pleuronectes hippoglossus, Fabr. Faun. Grcenl. p. 161 ; ? Mitch. Lit. Sf 



Phil. Trans. New York, i. p. 386 (not i.). 

 ? Hippoglossus vulgaris, Storer, Fish. Massach. p. 145 ; Dekay, New 



York Faun. Fish. p. 294. pi. 49. fig. 157. 

 Hippoglossus pinguis, Gaim. Voy. Scand. etLap. Poiss. pi. 22 (notFabr.). 



D. 100-102. A. 75. 



Dorsal and anal rays simple ; the dorsal commences above the 

 posterior third of the eye. The height of the body is two-sevenths 

 of the total length (with the caudal), the length of the head one- 

 foui'th. Scales very small, not ciliated ; interorbital space flat, scaly, 

 wider than the orbit. The lateral line descends gently in an oblique 

 straight Line above the pectoral, and is not curved. Snout more 

 than twice as long as the orbit, the diameter of which is one-eighth 

 of the length of the head. Lower jaw prominent; the length of 

 the maxillary is two-fifths of that of the head. Teeth conical, 

 pointed : upper jaw with two series, convergent posteriorly ; those 

 of the outer series become gradually smaller posteriorly ; a pair of 

 strong canine teeth anteriorly in the inner series, the other teeth of 

 this series being very small. Lower jaw with a series of strong 

 distant teeth. Front margins of the orbits on the same level. Fins 

 naked ; the distance of the dorsal from the caudal equals the depth 

 of the free portion of the tail ; the longest dorsal rays are behind 

 the middle of the fin, their length being one-third of that of the 

 head; length of the pectoral two-fifths of that of the head. No 

 spine before the anal. Yellowish-brown. 



Greenland. 



a. Very young. Greenland. From Hr. HolboU's Collection. 

 b-e. Adult : stuffed. Greenland. 



