1890.] SOME BRITISH PLEURONECTID^. 43 



third of the length of the head. Vomeriue teeth none. Vertical 

 fins rather high, the dorsal fin commencing in front of the upper eye 

 and terminating close to the caudal. Of the three anterior rays, 

 especially the second is elongate, being two thirds as long as the 

 head and broadly fringed ; caudal fin somewhat shorter than the 

 head, and about equal in length to the pectoral fin. Lateral line 

 with a semicircular curve above the pectoral fin ; scales of moderate 

 size, minutely ciliated on the edge. Ground-colour brownish grey, 

 marbled with black; some of the rays of the dorsal and anal flus 

 partially black ; the other fin-rays finely dotted with black. 



The largest specimen is 6 inches long and in an excellent state of 

 perservation. It was obtained by the Rev. \V. S. Green in the 

 Kenmare River, depth 10 fathoms. 



2. On the Occurrence o/ Rhombus boscii in British Seas. 

 Rhombus boscii (Risso) is another species new to the British fauna; 

 specimens were discovered by the Rev. W. S. Green in 150 and 315 

 fathoms off the S.W. coast of Ireland'. As this fish possesses 

 vomerine teeth, it has to be removed from the genus Jrnoc/lossus, to 

 vyhich I had referred it before having seen specimens '\ In fact, 

 it comes near to Rhombus megastoma, with which it was confounded 

 by Mr. Day^ 



3. On the Nomenclature of the Lemon Sole. 



I proposed for the Lemon Sole of the North Atlantic the name 

 of Solea aurantiaca, believing that I had recognized Risso's Solea 

 lascaris in a Sole from Madeira which has the body considerably 

 narrower and more elongate. Risso's description applies equally well 

 to both species, and I had no other reason for retaining the name 

 given by him for the Madeira fish than its southern origin : it 

 seemed to be more probable that the Mediterranean fish was iden- 

 tical with the one from Madeira than with that of the North At- 

 lantic. However, the British Museum has now obtained a specimen 

 from Nice which is evidently identical with our Lemon Sole, and 

 gives sufiicient ground for applying the name of Solea lascaris to 

 the latter, and not to the Madeira fish, which is clearly a distinct 

 species. Therefore the synonymy of the two fishes will stand as 

 follows : — 



Solea lascaris. 



Pleuronectes lascaris, Risso, Ichth. Nice, p. 311. 

 Solea lascaris, Risso, Eur. merid. iii. p. 249; Day, Fish. Great 

 Brit. ii. p. 42. 



Solea pegusa, Yarrell, Brit. Fish. 2nd ed. (nee Lacep.). 



Solea nasuta, Richardson, in Yarrell, Brit. Fish. 3rd ed. (nee Pall.). 



Solea aurantiaca, Giinth. Fish. iv. p. 467. 



Lemon Sole. 



North-Eastern Atlantic ; Mediterranean. 



1 Ann. & Mag. N. H. 1889, iv. p. 418. ' Fish. Great Brit. ii.p. 21. 



' Cat. Fish. iv. p, 416. 



