HORN EXPEDITION-ZOOLOGY. 
APPENDIX. 
411 
This description lias been compiled from a well-preserved specimen of inch 
total length, caught in the Barcoo, near Innamiucka. A larger specimen, of about 
eight inches total length, from the Finke River, Herniannsburg, is of a darkish 
colour ; but this is most likiily caused by having been dried formerly. I unite this 
species with some doubt with Gunther’s Group B, Plotosina, of his first sub-family 
Siluricbe Homaloptera. It diflers from Gunther’s Group Plotosina only through 
not possessing a long posterior dorsal fin, which is in this species almost rudi¬ 
mentary. I thought it not advisable to separate it, for this one reason, from the 
genus Plotosus, as this would interfere with the jiresent classification of this 
group. 
Locality ,—Barcoo River, Finke River at Herniannsburg and Idracowra, and 
in Palm Creek and Ilpilla Creek. 
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