413 



Fig. 211. Lower surface of head of -Monoptcrus albus (Zuievv). 



Right gillopening opened, showing the 3 rudimentary gills and the 3 gillslits. 



a sound brought into the left gillopening, which is separated from the right 



one by the septum s. X X indicates where the left part of the constrictor of 



the gillmembranes is cut through. Nat. size. 



i. Monopterus albus (Zuiew). 



Muraena alba Zuiew, Nov. Act. Ac. Sc. Petropol. VII. 1793, p. 299. 



Monopterus javanensis Lacepede, Hist. nat. Poissons II. 1798, p. 139. 



Unibranchapcrtura laevis Lacepede, 1. c. V. 1803, p. 657, 659. 



Monopteru'i javaniciis Shaw, General Zoology, Pisces IV. 1804, p. 33. 



Mcnopterus laevis Richardson, Voy. Sulphur, Ichth. 1844, p. 116. 



Monopterus cinereus Richardson, I.e. p. 117. 



Monopterust vcl Synbranchust xanthogaster Richardson, I.e. p. 118. 



Monopterus laevis Richardson, in Rep. I5th Meeting British Assoc. London, 

 1846, p. 315. 



Monopterns cinereus Richardson, 1. c. p. 315. 



Monopterus marmoratus Richardson, I.e. p. 315. 



Monopterus javanicus Bleeker, Verh. Batav. Gen. XXIII. 1850, Ichth. Midden- 

 en Oost-Java, p. 22. 



Monopterus javanicus Cantor, Journ. Asiat. Soc. Bengal XVIII. 1850, p. 1321. 



Monopterus javanensis Bleeker, Verh. Batav. Gen. XXV. 1853, Muraenoid. p. 59 '). 



i) BLEEKER cites as synonym Synbranchus ciirychasma Kuhl & van Hasselt, 

 after an unedited drawing of these naturalists without a description. 



