﻿41 



Fig. 211. Lower surface of head of Monopterus albiis (Zuiew). 



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 J'. X X indicates where the left part of the constrictor of 



the gillmembranes is cut through. Nat. size. 



I. Monopterus albus (Zuiew). 



,AcIh>-.^ 



Muraend alba Zuiew, Nov. Act. Ac. Sc. Petropol. VII. 1793, P- 299- 



Afo?iPpterus javanensis Lacepede, Hist. nat. Poissons II. 1798, p. I39- 



Untbranchapertura laevis Lacepede, I.e. V. 1803, p. 657, 659. 



Monopterus javanicus Shaw, General Zoology, Pisces IV, 1804, p. 33. 



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



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



Monopterus} vel Synbranchns> xanthogastcr Richardson, I.e. p. 118. 



Monopterus laevis Richardson, in Rep. 15th Meeting P.ritish Assoc. London, 

 1846, p. 315. 



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



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



Monopterus Javanieus Dleeker, Verh. Batav. Gen. XXIII. 1850, Ichth. Midden- 

 en Oost-Java, p. 22. 



Monopterus javanieus Cantor, Journ. Asiat. Soc. P>engal XV III. 1850, p. 1321. 



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



I). Bi.EEKER cites as synonym Synbranchus eurychasma Kuhl & van Ifasselt, 

 after an unedited drawing of these naturalists witliout a description. 



