NO. 2062. NEW ROTATORIA FROM PANAMA— HARRING. 541 



regular. The ventral plate is slightly narrower than the dorsal and 

 has prominent markings of the pattern shown in figure 1. The pos- 

 terior segment is large and bluntly pointed; the coxal plates are 

 small and semicircular. The fii-st foot joint is well marked; the 

 movable joint is large and subsquare. The moderately long toes are 

 parallel-sided, slightly decurved and taper abruptly to a fine point, 

 but there is no true claw. 



Total length, 115 /i; length of lorica, 80 /«; length of dorsal plate 

 70 1^, width, 60 /x; width of ventral plate 56 //; width of anterior 

 spines, 54 pt; width of anterior edge of dorsal plate 45 //; length of 

 toes, 30 jj.; depth of body, 45 /x. 



Type.— Cat. No. 16575, U.S.N.M., from a stagnant pool at Empu-e 

 (4), where the species is abundant; common in a pool between Black 

 Swamp and Gatun (2) and in Rio Trinidad, above Agua Clara (10). 



Murray identifies this animal with some misgivings with Distyla 

 fiexilis Gosse. His figure seems to have been drawn from an abnor- 

 mal (dried ?) specimen, at least none of the numerous specimens in the 

 Panama collections resembles it very much. 



LECANE PUSILLA, new species. 

 Plate 20, figs. 4-6. 



The body of this small species is but little longer than broad and 

 very thick; the anterior margin of the dorsal plate projects beyond 

 the ventral plate. Both are straight; they do not meet even in com- 

 plete retraction, but leave the lorica widely open in front; no spines are 

 present at the antero-lateral angles of the lorica. The dorsal plate is 

 nearly circular; the markings are of an unusual pattern, as one pair 

 of ridges overlap from the second to the thu'd row. The ventral plate 

 is parallel-sided in its anterior half and rounded posteriorly; only the 

 central markings are conspicuous. The lateral sulci are deep. The 

 rounded posterior segment projects considerably beyond the dorsal 

 plate; the coxal plates are of moderate size and semicircular. The 

 first foot joint is barely distingusihable, wliile the second is unusually 

 large. The toes are short and nearly straight with a slender, re- 

 curved claw, which is occasionally directed slightly outward, as 

 shown in fig. 4; usually they are in the axis of the toe. (See fig. 6.) 



Total length, 75 //; length of lorica, 60 //; length of dorsal plate, 

 54 IX, width, 52 [x; width of anterior edge, 38 [x; width of ventral plate, 

 45 IX, anterior edge, 50 /i; length of toes without claw, 15 /i, claw, 5 fx; 

 depth of body, 40 [x. 



_ Type.— C&t. No. 16574, U.S.N.M., is from a stagnant pool at Em- 

 pire (4), where it is common; also in Rio Grande (6). 



This species is closely related to Lecane nana (Murray); it differs 

 mainly in having fairly strong markings on the lorica, while L. nana 

 is smooth; in the latter the toe is without any claw. 



