422 PLEUKONECTID-a;. 



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 speckled with blackish. 

 (Girard.) 



Coasts of California. 



13. HEMIRHOMBUS. 



Rhombus, sp., Cuv. 



Hemirhombus, Bleek. in Compt. Rend. Acad. Sc. Amsterd. 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 palatine 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. Gill- 

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

 broadish. 



Tropical parts of the Atlantic. 



1. Hemirhombus aramaca. 



Aramaca, Marcgr. p. 181. 



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



Lacep. iv. p. 656. 

 Pleuronectes aramaca, Cuv. Skgne Anim. 



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



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

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

 pectoral rays of the coloured side sometimes prolonged into a very 

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

 provided 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. 



