38 



MEMOIRS OF THE CARNEGIE MUSEUM 



Acanthophacelus bifurcus, Archicheir minutus, and Steatogenys elegans. Of these 

 A. minutus is known by but one specimen. The first three are new, and S. elegans 

 is found in the Amazons. Mr. Shideler went up to the cataract at Malali but 

 secured only twenty-three species, of which Myloplus asterias was the only one I 



Fig. 8. Fish-fence made of reeds and banana leaves on creek above Wismar. Indian with bow and arrow 



ready to shoot larger fishes brought up by poison. 



did not get elsewhere. A list of the fishes which do not extend so far inland and 

 another list of those which do not extend so far down stream as Wismar are given 

 later. 



On September 29th, at 5 :30 P.M., we took the train for Rockstone. Rockstone 

 consists of an hotel, terminal station of the steamer connecting with the railroad, 

 a small store, and a number of cottages for workmen. All goods for the gold-mines, 

 and all rubber coming from the interior are transferred here to avoid the cataracts 

 in the Essequibo below Rockstone. The Essequibo is here divided into two chan- 

 nels by Gluck Island. At the time of our visit rocks were exposed at the stelling 

 and a short distance below Rockstone. At the bend of the river above Rockstone 

 there was an extensive sand-bar exposed. We collected at the Rockstone stelling, 

 in the railroad-cut running into the river just below the town, in a small woodland 

 creek on Gluck Island, and on the sand-bank at the bend above Rockstone. The 



