17. PLEURONECTES. 441 



the anal. Gill-rakers styliform, rather short, widely set. Brownish 

 or hlackish, with yellow spots. 



From the coasts of France along all the coasts of Northern Europe. 

 Iceland. 



a. Half-grown. Bahuslan. Presented by Hr. A. W. Malm. 



b~(/. Adult, half-grown, and young: skins and stuffed. Frith of 



Forth. From Dr. Parn ell's Collection. 

 h-Jc. Very young. Frith of Forth. 

 Z-w, 0. Young. Brighton, Presented by Mr. E. Gorrard and by 



J. G. Children, Esq. 

 p. Large specimen. London market. 



q-1/. Adult, half-grown, and young: stuffed and skins. England. 

 z. Twenty-five inches long : stuffed. 

 a-ft. Half-grown : sldns. From Gronow's Collection. 

 y-S. Adult : skeletons. British. 



e. Adult: skeleton. German Ocean. From Dr. A. Giinther's Collection. 

 Skeleton. — The bones of the jaws, the palatine and pterygoid are 

 more developed on the left side than on the right ; the hiatus between 

 articulary and dentary is narrow. The two prefrontals with the tur- 

 binals are turned round towards the right side, being fixed to that 

 portion of the principal frontal which separates the two orbits from 

 each other ; the occipital crest is very low. Pharyngeal hemes very 

 stout, bearing obtusely conical molar-like teeth, which are arranged 

 in three or four irregular series. The urohyal is horseshoe-like ; 

 one of its branches is fixed by a tendinous filament to the hyoid, the 

 other to the symphysis of the humeri. The pubic bones are very 

 narrow, and attached to the humeral arch by a pair of long styliform 

 processes. The structure of the vertebral column is very similar to 

 that in Rhombus, but the number of interneurals and interhaimals 

 is fewer, as frequently only one corresponds to a neural and haimal 

 spine. The length of the first haemal spine equals that of the twelve 

 first vertebrae ; the anterior interhaemal is exceedingly strong, ter- 

 minating in a polished spine anteriorly. 



2. Pleuronectes pseudoflesus. 

 Platessa pseudoflesus, Guttschc in Wieipn. Arch. 1835, p. 143. 

 B. 7. D. 62-GB. A. 46-48. Ca3c. pyl. 4. 



The height of the body is two-fifths of the total length (with the 

 caiidal), the length of the head two-ninths. Some scales along the 

 lateral line, along the base of the dorsal and anal, on the sides of the 

 head and of the abdomen ai'e ciliated, the rest and the blind side being 

 entii'cly smooth. A series of six obtuse bony tubercles runs from the 

 eye to the origin of the lateral line. The latter is slightly curved 

 above the pectoral, the depth of the cur\e being less than the width of 

 the base of the pectoral. Eyes and snout as in PJ. pJatessa. The dorsal 

 commences above the middle of the eye, and terminates at a short 

 distance from the caudal ; the rays aljout the thirtieth are the longest. 

 A spine before the anal. Light-brownish, with yellow spots. (Goiisihc.) 



German Ocean. 



