478 PLEtTEONECTIDiE. 



the head. Rays of the vertical fins branched ; caudal rounded, its 

 length being one-fourth of the total. Brown : head and body with 

 numerous large, rounded or kidney-shaped white spots edged with 

 dark brown. 



Gulf of Fonseca. 



a. Thirty-eight lines long. Presented by Sir J. Richardson. 



34. Solea thepassii. 

 Achirus thepassii, Bleek. Amboina, v. p. 500. 



D. 67. A. 46. L. lat. 80. 



Dorsal and anal fins simple, or bifid at the top only. The height 

 of the body is contained twice and two-thirds to twice and three- 

 foiirths in the total length (with the caudal). Eyes subcontiguous. 

 Violet-oHve, with numerous small brown dots, with two large irre- 

 gular brown blotches on the lateral line, and with four similar spots 

 along the back. 



East Indian Archipelago. 



a. Twenty-nine lines long. From Dr. P. v. Bleeker's Collection. — 

 This specimen has 80 distinct transverse series of scales, and 

 not 65 as stated by Bleeker. 



Achirits poropterus, Bleek. Yerhand. Batav. Genootsch. Pleuron. 

 p. 19, or Natuurk. Tydschr. Nederl. Ind. i. p. 410, appears to be 

 scarcely different from S. thepassii ; it has a more uniform coloration 

 and a rather lower body. 



a. Twenty-four lines long. From Dr. P. v. Bleeker's Collection. 



24. PARDACHIRUS. 



Achirus, sp., Auct. 



Eyes on the right side, the upper in advance of the lower. Mouth 

 unsymmetrical, narrow, narrower on the left side than on the right ; 

 teeth minute, on the blind side only. Dorsal and anal rays scaly; 

 the dorsal commences on the extremity of the snout and terminatea 

 at the root of the caudal. Pectorals none. Two separate ventrals. 

 Scales small, not ciliated, or only a few with inconspicuous cilia ; 

 lateral line straight, — a second on the blind side along the upper pro- 

 file of the neck, commencing from the snout ; each dorsal and anal 

 ray with a pore at the base. Gill-openings narrow, the gUl-mem- 

 branes being broadly united below the throat; giU-rakers rudimentary. 



Indian Ocean and Archipelago. 



1. PardacMrus marmoratus. 



?? Pleuronectes, sp., Gt-onov. Zoophyl. no. 256. 

 ?? Pleuronectes alous, Bl. Schn. p. 159. 

 ?P Achirus barbatus, Laccp. iv. pp. 658, 660. 

 Achirus marmoratus, LacSp. I. c. 



