404 PLEITRONECTID^. 



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 portion 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. 



fZ. Adult : stuffed. Devonshire. Presented by Lieut.H.F.Spence,E..N. 

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

 /. Skeleton, 5 feet long. 



2. Lateral line not ciu-ved. 

 2. Hippoglossus grcenlandicus. 



Pleuronectes hippoglossus, Fain: Faun. Grcenl. p. 161 ; ? 3Iitch. Lit. 8f 



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

 ? Hippoglossus vulgaris, Storer, Fish. Massach. p. 145 ; Dvkay, Netv 



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

 Hippoglossus pinguis, Gaim. Voy. Scand. etLap. Puiss. pi. 22 (not Fabr.). 



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 cm-ved. 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 masillaiy 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 smaU. 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. YeUowish-brown. 

 Greenland. 



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

 b-e. Adult : stuffed. Greenland. 



