416 PLEURONEOXIDiE. 



left ventral occupy the whole length between throat and vent, and 

 a portion of the humeral arch projects behind the ventral in form of 

 one or two triangular spines. Uniform transparent reddish. 



P'rom the Mediterranean to the South coast of Englan ^ and I^-e- 

 land. 



a, b. Adult : skins. Mediterranean. 



c. Half-grown. Cannes. Presented by Th. Giinther, M.D. 



d. Half-grown : skin. Brixham. 



e. Half-grown : skin. Plymouth. From Mr. Yarrell's Collection. 

 f-k. Half-grown : skins. British specimens. 



/. Half-gro-\vn. 



2. Arnoglossus conspersus. 



Pleuronectes conspersus, Canestr. Arch. Zool. i. p. 10. tav. 1. fig. 2. 

 B. 7. D. 86-90. A. 67-70. 



Scales of moderate size, very thin and deciduous ; the dorsal fin 

 commences before the eye. Teeth minute, of equal size. The height 

 of the body is contained twice and a third in the total length (without 

 caudal), the length of the head thrice and four-fifths. The length 

 of the maxillary is nearly one-third, that of the mandible rather less 

 than one-half of that of the head. Eyes separated by a very narrow 

 scaly ridge, the lower being slightly in advance of the other. Lateral 

 line with a subscmicircular cui've above the pectoral. The dorsal 

 and anal are continued on to the root of the caudal. A portion of 

 the humeral arch projects behind the ventral in form of two trian- 

 gular spines. The coloured side dotted with brown. {Can.) 



Genoa. 



3. Arnoglossus boscii. 



Pleuronectes boscii, Risso, Ichth. Nice, p. 319. pi. 7. fig. .3.3; Bmiap. 



Faun, Ital, Pesce; Canestr. Arch. Zool. i. p. 19. tav. 2. fig. 2. 

 Hippoglossus boscii, Cuv. Reyne, Anim. ; Risso, Eur. Mericl. iii. p. 24G. 

 Rhombus boscii, Cuv. R^gne Anim. 2iid edit. 



D. 75-82. A. 61-68. L. lat. ca 45. 



Scales of moderate size. Teeth minute, of equal size. The dorsal 

 commences before the eye. The height of the body is one-third of 

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

 that of the caudal one-sixth. The greatest depth between the anal 

 fin and the straight portion of the lateral line is less than the length 

 of the head. Interorbital space narrow, flattish, scaly ; lateral line 

 with a subscmicircular curve above the pectoral. Snout nearly as 

 long as the eye, the diameter of which is one-third of the length of 

 the head. Lower jaw prominent ; maxiUary half as long as the head. 

 Front margins of the eyes nearly on the same level. The distance 

 of the dorsal from the caudal is less than the depth of the free portion 

 of the tail. The longest dorsal rays are on the middle of the fin, and 

 somewhat .shorter than the pectoral, which is half as long as the head 

 and much longer than the ventral. Transparent reddish-grey, with 



