5. RnoMBirs. 411 



I. Twenty-seven inches long: stuffed. Plymouth. Presented by 



Lieut. H. F. Spence, R.N". 

 m-o. Half-grown and young : skins. From Mr. Yarrell's Collection. 

 p. Adult: stuffed. England. 

 q. Adult : stuffed. Frith of Forth. 



r. Fine specimen. Bahusliin. Presented by Hr. A. W. Malm. 

 s~t. Half-grown : skins. From Gronow's Collection. 

 u. Adult : stuffed. 

 V. Adult: skeleton. British. 



The sheleton is very similar to that of Rh. maximus ; the vertical 

 processes of the vertebrae are considerably shorter, the length of the 

 first haemal spine being equal to that of the eleven anterior ver- 

 tebrae only. 



4. Rhombus aquosus. 



Pleuronectes maculatus, flitch. Report in jmrt oyi the Fishes of New 

 York, p. 9 ; Dekay, Neio York Faim. Fish. p. 301. pi. 47. fig. 151. 



aquosus, 3£itch. in Lit. ^- Phil. Trans. NeivYork, i. p. 389. pi. 2. 



fig. 3. 



Rhombus aquosus, Cuv. Kegne Anim. 



? Rhombus aquosus, Storer, Bost. Journ. Nat. Hist. i. p. 351, and Fish. 

 3Iassach. p. 146. 



D. 63-65. A. 49-54. L. lat. 85. 



The height of the body is contained once and two-thirds in the 

 total length (without caudal), the length of the head thrice and a 

 third. Scales smaU, smooth, covering the postorbital half of the 

 head. Interorbital space naked, flattish, its width being rather less 

 than the vortical diameter of the eye. Each fin-ray is accompanied 

 by a scries of minute scales. Lateral line %vith a subsemicircular 

 curve above the pectoral. Lower jaw prominent ; the length of the 

 maxillary is two-fifths of that of the head. The lower eye is some- 

 what in advance of the upper. The dorsal fin terminates close by 

 the root of the caudal ; its anterior rays terminate in fringes, and its 

 longest rays are behind the middle of the fin, their length being less 

 than that of the pectoral, and more than one-half of that of the head. 

 GiU-rakers closely set, slender, two-thirds as long as the eye. Brown- 

 ish ; back and vertical fins with dai'ker spots. 



Atlantic coasts of the United States. 



a. Adidt : skin. New York. From Dr. ParneU's Collection. 

 6. Fine specimen. N. America. Presented by the Smithsonian In- 

 stitution. 



2. Ventral free from anal ; scales ciliated. 

 5. Rhombus megastoma. 



The Whiff or Maijsole. Sail-Fluke. 

 Passer comubiensis, Jaqo in Hut/, Si/n. p. 163. fig. 2. 

 Whiff, Penn. Brit. Zool. iii. p. 209. 

 Pleuronecte.s, sp. 30, Wall. AH. iii. p. 120. 



