422 PLEURONECTIDiE. 



crease in height towards the posterior third of the fin ; the fin ter- 

 minates close by the caudal. Scales not very small, ciliated ; 

 lateral line nearly straight. Yellowish ; fins speclded with blackish. 

 {Girard.) 



Coasts of California. 



13. HEMIRHOMBUS. 



Rhombus, sp., Cuv. 



Hemirhombus, Bleek. in Compt. Rend. Acad. Sc. Anisterd. xiii. 1862, 

 Pleuron. 

 Mouth wide, the length of the maxillary being more than one- 

 third of that of the head. Teeth of the upper jaw in a double series, 

 with canines anteriorly, those of the lower jaw in a single series ; 

 vomerine and palatiae teeth none. The dorsal fin commences on the 

 snout ; dorsal and anal rays simple. Scales rather small, ciliated ; 

 lateral line without strong curve. Eyes on the left side. GiU- 

 membranes broadly united below the throat ; gill-rakers compressed, 

 broadish. 



Tropical parts of the Atlantic. 



1. Hemirhombus aramaca. 



Aramaca, 3Iarcgr. p. 181. 



? Pleuronectes macrolepidotus, Bl. vi. p. 25. tab. 190 ; Bl. Schn. p. 156 ; 



Lacep. iv. p. 656. 

 Plem'onectes aramaca, Cuv. Rkgne Anim. 



D. 85. A. 65. L. lat. 70. 



The dorsal commences before the eye. Teeth of the upper jaw m 

 a double series, with one or two pairs of small canine teeth in front ; 

 those of the lower jaw closely set, conical, in a single series. Scales 

 rather small, adherent, ciliated ; lateral line nearly straight, each 

 scale of the lateral line with one or two minute scales at the base. 

 The height of the body is contained twice and a half in the total 

 length, the length of the head thrice and three-fourths. Snout rather 

 shorter than the eye, the diameter of which is two-ninths of the 

 length of the head. Jaws equal in length anteriorly ; the length of 

 the maxillary is two-fifths of that of the head ; maxillary scaly. 

 Interorbital space concave, scaly, half as wide as the vertical dia- 

 meter of the orbit ; the concavity between the orbits is produced by 

 two longitudinal ridges convergent posteriorly. Head nearly entirely 

 covered with ciliated scales. Rays of the vertical fins scaly; the 

 distance between dorsal and caudal is one-fourth of the depth of the 

 free portion of the tail. The longest dorsal rays are behind the 

 middle of the fioi, two-fifths of the length of the head. The upper 

 pectoral rays of the coloured side sometimes prolonged into a very 

 long filament. GUI-rakers one-third as long as the eye, interiorly 

 pro\'ided with spines. Brown, marbled with darker, and with nu- 

 merous round light spots. 



Atlantic coasts of tropical America. 

 a. Fine specimen. Cuba. From the Collection of the Zoological 

 Society. 



