IG. RHOMBOiDicnTnys. 433 



of the upper. 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-iifths of the length of the head. The 

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

 toral raj's not elongate. Coloiu' either nearly uniform dark-bro^vn, or 

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

 darker, and mth u dark-brown spot on the lateral line. 

 Mediterranean and the neighbouring parts of the Atlantic. 



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



b. Half-grown. Sicily. Presented by W. Swainson, Esq., as Rhom- 



bus podas. 



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



d. e, f. Adult : Madeira. 



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



3. Rhomboidichthys lunatus. 



Catesby, Carol, pi. 27. 



Pleiironectes luuatus, L. Syst. Nut. i. p. 459; Bl. Schn. p. 154. 



argils, Bl. tab. 48. 



Rhombus argus, Cuv. Meyne 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 space is mucli 

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

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

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

 times -with a prominent knob. Gill-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. Erown, 

 with large, rounded, light spots, suiTounded by a blue ring ; two 

 blackish blotches on the lateral line ; fins and head with 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. Piu'chased of Mr. Scrivener. 

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



4. Rhomboidichthys oceUatus. 



Rhombus ocoUatus, Aya.-is. hi Spix, Pise. Bnis. p. 85. tab. 46 (ventral 

 erroneously uuilcd with caudal) ; t'udcbi. Anim. nam: Poiss. p. 78. 

 ? Rhombus bahianus, Cadcln. 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 



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