NO. 2062. NEW ROTATORIA FRO 31 PANAMA— EARRING. 529 



of D.forcipatus. The trophi of the Panama specimens are identical 

 with those of typical specimens of D.forcipatus. 



ENCENTRUM FELIS (MuUer), 



Vorticellafelis Muller, Verm. Terr. Fluv., vol. 1, pt. 1, 1773, p. 108. 

 Diglenafelis Bilfinger, Jahresh. Naturk. Wiirttemberg, vol. 50, 1894, p. 46. 



Common in a stagnant pool, Empire (4). While the specimens 

 were partly contracted, the trophi make the determination reasonably 

 certain. 



BRACmONUS ANGULARIS CAUDATUS Barrois and Daday. 



From the following localities: Stagnant stream under old bridge, 

 Old Panama (probably Rio Alcorobo), common; Gatun Lake, 

 enormous numbers; pond at Bohio (7), very abundant; Carabali 

 (Gorgona) Reservoir, common; Bayou of French Canal, about 2 

 miles south of Gatun, common; pond at Miraflores (12), common. 



BRACHIONUS BTJDAPESTINENSIS Daday. 



Specimens agreeing with material collected here at Washington 

 were common in CarabaU (Gorgona) Reservoir. 



BRACmONUS CAPSULIFLORUS Pallas. 



The form with posterior spines {B. lakeri Muller) is common on 

 the Isthmus; the strongly asymmetric foot tube is abnormally 

 developed, the left spine being sometimes as long as the postero- 

 lateral spines ; the median anterior spines are also longer than usual. 

 This form occurs in the following collections: Stagnant stream imder 

 old bridge. Old Panama, common; Gatun Lake, enormous numbers; 

 Mindi Reservoir, few; Rio Grande Reservoir (5), few; Rio Grande 

 (6), few; pond at Miraflores (Rio Camitillo) (12), common. 



The spineless form {B. urceolaris Muller) occurred in great abim- 

 dance in a sluggish stream partly filled with grass, in the savannas 

 between Panama and Old Panama, 



BRACmONUS DOLABRATUS, new species. 

 Plate 16, figs. 1-2. 

 While showing a certain resemblance to B. angularis Gosse, this 

 species has a number of pecuharities that entitle it to specific rank. 

 At the junction of the dorsal and ventral plates of the lorica There 

 are two blunt lateral spines or knobs and a similar pair at the postero- 

 lateral angles. They are always shghtly asymmetric and very varia- 

 ble; the form figured may be considered an average one. On each 

 side of the foot opening is a hammer-shaped spine, frequently with 

 small posterior spicules or setae ; it is possible that they are always 

 present in the living animal, and that they may have been destroyed 

 by the preservative. The egg is carried by the parent and always 

 34843°— Proc.N.M.vol.47—1^ 



