NO. 2062. NEW ROTATORIA FROM PANAMA— HARRING. 527 



2 Pool covered with algae, near the railroad, between Black 

 Swamp and Gatun; now submerged in Gatun Lake 



3. Creek flowing into Camacho Reservoir; clogged with weeds 

 covered with Nostoc, etc. 



4. Stagnant pool at the end of Canal cut. Empire. At the time 

 the collections were made it was nearly dry and green with algae; 

 when filled the pool is probably 5 or 6 feet deep. 



5. Rio Grande Reservoir, near the railroad bridge. 



6. Rio Grande, collections from the river. 



7. Pond west of Rio Chagi-es at Bohio. Formed by a dam built 

 by the French. Water lilies along shore; the collections were made 

 in the middle, where the water was clear. 



8. Pond east of the Canal, east of Empire. About 2 acres in 

 area; surrounded by grass growing out from the shore in such masses 

 that it will nearly support the weight of a man. 



9. Rio Trinidad, below Agua Clara, about 1 mile from mouth; 

 now part of Gatun Lake. 



10. Rio Trinidad, just above Agua Clara; now part of Gatun Lake. 

 IL Rio Trinidad, opposite Escoval, in weeds along shore; now 



part of Gatun Lake. 



12. Pond north of fill work at Miraflores; really back water of 

 Rio Camitillo. 



LIST OF THE SPECIES COLLECTED. 



NOTOMMATA AURITA (Muller). 



A single recognizable specimen in a collection from a pond north 

 of the fill work at Miraflores, formed by back water of Rio Camitillo 

 (2). 



NOTOMMATA CERBERUS (Gosse). 



Several specimens, of which one was fully extended, occurred in a 

 creek flowing into Camacho Reservoir (3). 



NOTOMMATA COPEUS Ehrenberg. 



Common in a slow stream in garden of Isthmian Canal Commis- 

 sion, Empire; also in a collection from the railroad bridge over 

 Black Swamp (1). 



NOTOMMATA PSEUDOCERBERUS de Beauchamp. 



A single specimen from a pool near the railroad, between Black 

 Swamp and Gatun (2); another from Rio Trinidad, collected just 

 above Agua Clara (10). 



NOTOMMATA TORULOSA (Dujardin). 



One specimen, identified by the trophi, from a stagnant pool by 

 the raiboad, north of bridge over Black Swamp. 



