10. RHOMBOIDICnTHYS, 433 



of the U2)per. Maxillary and orbital margin sometimes with a pro- 

 minent knob. The longest dorsal rays are in the posterior third of 

 the length of the fin, two-fifths of the length of the head. The 

 length of the caudal is rather more than one-fifth of the total. Pec- 

 toral rays not elongate. Colour either nearly uniform dark-brown, or 

 brown with numerous bluish or light-reddish-brown spots edged with 

 darker, and with a dark-brown spot on the lateral line. 

 Mediterranean and the neighbouring parts of the Atlantic, 



a. Adult. Cannes. Presented by Th. Giinther, M.D. 

 h. Half-growTi. Sicily. Presented by W. Swainson, Esq., as Rhom- 

 bus podas. 



c. Adult : bad state. Mediterranean. Purchased of Mr. Frank. 



d, e, f. Adult : Madeira. 



g. Adult. Lanzarote. Presented by the Rev. R. T. Lowe. 



3. Rhomboidichthys limatus. 



Cateshf, Carol, pi. 27. 



Pleuronectes lunatus, L. Syst. Nat. i. p. 459 ; Bl. Schn. p. 154. 



argus, £1. tab. 48. 



Rhombus argus, Cuv. Re.gne Anim. 



D. 92. A. 73. L. lat. 90. 



The height of the body is one-half of the total length (without 

 caudal) ; the length of the maxillary is one-third of that of the head. 

 Teeth in a single series. The width of the interorbital sjiace is much 

 more than that of the orbit, one-third of the length of the head in 

 full-grown specimens, one-fourth in half-grown. The lower eye is 

 much in advance of the upper. Maxillary and orbital margin some- 

 times with a prominent knob. GiU-rakers lanceolate, widely set, 

 one-third as long as the eye. The upper margin of the dorsal fin is 

 nearly even, the length of one of the longest rays being two-fifths of 

 that of the head. Caudal one-seventh of the total length. The 

 upper rays of the pectoral sometimes exceedingly elongate. Brown, 

 with large, rounded, Hght spots, surrounded by a blue ring ; two 

 blackish blotches on the lateral line ; fins and head wdth numerous 

 small round blue spots. 



West Indies. 



a-h. Fine specimens, 14 inches long. 



c. Adult. From the Haslar Collection. 



d. Half-grown : skin. West Indies. Purchased of Mr. Scrivener. 

 e-g. Adult and half-grown : skins. Jamaica. 



4. Rhomboidichthys ocellatus. 



Rhombus ocellatus, Af/ass. in Spix, Pise. Bras. p. 85. tab. 46 (ventral 

 erroneously united with caudal) ; Casteln. Anim. nouv. Poiss. p. 78. 

 ? Rhombus bahianus, Casteln. I. c. pi. 41. fig. 1 . 



D. 86. A. 65. L. lat. 85. 



The height of the body is two-thirds of the total length (without 



VOL. IV. 2 F 



