no. 2062. NEW ROTATORIA FROM PANA3IA— BARRING. 533 



EUCHLANIS PLICATA Levander. 



While this species is rather common iii the collections, all the 

 specimens are partly contracted, so that no satisfactory figm'e can be 

 given of it. From a pool between Black Swamp and Gatun (2), 

 common; stagnant pool at Empire (4), few; Rio Grande Reservoir 

 (5), common. 



EUCHLANIS TRIQUETRA Ehrenberg. 



It is not without hesitation that the Panamanian specimens are 

 listed under this name; the dorsal keel is absent, the two lateral 

 plates simply commg together at an approximately right angle. 

 However, the resemblance to E. triquetra is otherwise very close, and 

 considering the present unsatisfactory status of the genus, it seems 

 advisable to refer this form to triquetra until the limits of variation 

 in this genus are better known. It occurred in a collection from 

 the railroad bridge over Black Swamp (1), common; Rio Alcorobo, 

 under bridge on road from Panama to Old Panama, few. 



DIPLEUCHLANIS PROPATULA (Gosse). 



Isthmian specimens of this species resemble closely the form 

 figured by de Beauchamp from the Lofu River.^ In collection from 

 railroad bridge over Black Swamp (1), few; creek flowuig into Cama- 

 cho Reservoir (3), few; stagnant pool at Empire (4), common; Rio 

 Grande Reservoir (5), few; Rio Grande (6), few; pond at Miraflores, 

 back water of Rio Camitillo (12), common. 



LECANE CREPIDA, new species. 

 Plate 22, figs. 4-7. 

 The body is paraUel-sided for one-half of its length and tapers 

 rapidly to the foot; it is strongly gibbous posteriorly and has a very 

 flexible lorica. The anterior dorsal margin is slightly convex, the 

 ventral a trifle concave; the anterior spines are stout and slightly 

 incurved. The dorsal plate is strongly convex and much smaller 

 than the ventral; its limits are rather ill-defined and the markings 

 are limited to two pairs of divergent, wavy ridges, begiiming near 

 the anterior margin. The ventral plate is moderately convex and 

 has two broken series of ridges extending the greater part of its 

 length; there is a well-marked transverse fold immediately in front 

 of the foot. As shown in the cross section of the body (fig. 8), there 

 are no lateral sulci; the section of the lorica connecting the dorsal 

 and ventral plates is very slightly concave and marked with three 

 ridges, one posterior, and a pah' inunediately in front of the lateral 

 antennae, which are just above the edge of the ventral plate. The 

 posterior segment merges without any definite anterior limit with 

 the body; ventrally it has a large, circular opening for the foot. 



1 Bull. Soc. Zool. France, vol. 38, 1913, p. 184, fig. 2. 



