402 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



middle as the greatest length; dorsal seta about twice width of 

 ramus from subterminal claw and reaching slightly beyond tip of 

 ramus; terminal claw about seven-ninths length of furca measured 

 along the anterior edge; subterminal claw slightly shorter, and both 

 toothed in a peculiar manner, a double set of teeth apparently being 

 present (fig. 4), the upper set being coarser and defined by larger 

 teeth at either limit, the other or distal set being smaller and more 

 numerous. Terminal seta aborted and scarcely discernible. 



Described from a number of specimens sent me by Prof. A. E. 

 Beardsley, of the State Normal School, Greeley, Colorado. Collected 

 near Greeley, Colorado, May 5, 1901. 



2. PARACANDONA Hartwig, 1899. 



Paracandona Hartwig, Zool. Anzeiger, XXII, 1899, i>i>. 309-311. — Sharpe, 

 Proc. U. S. Nat. Mus., XXVI, 1903, p. 997. 



Terminal claws of the second antenna? very long; the penultimate 

 segment at least as long as the united second and third segments. 

 The terminal segment of the mandibular palp provided with two 

 very strong claws, of which one is united by fusion to the segment. 

 Second feet with an extra long seta on each of the third and fourth 

 segments. Appendages otherwise as in Candona, but small and 

 slender. 



Shell tumid, reticulate pitted, as a honey-comb. Small, beautiful 

 forms not more than 0.8 mm. long. Branchial plate of two setae. 

 Second antenna? of both sexes 5-segmented. 



This genus was established by Hartwig to include forms the type 

 of which is Paracandona (Candona) euplectella Robertson. Repre- 

 sented by only the species euplectella, which has not heretofore been 

 reported from America. Heretofore reported only from England 

 and Germany. 



2. PARACANDONA EUPLECTELLA (Brady and Norman). 



Plate I.I I, fins. 1-5. 



Candona euplectella Brady and Norman, Trans. Royal Dublin Soc, IV, I'd 

 ser., 1889, p. 105. pi. ix, figs. 7-8.— Muller, Zoologica, XII, Heft 30, 

 1900, p. 37, pi. ix, figs. 1-9, 14. 



Dimensions of female. — Length, 0.56 to 0.65 mm. ; breadth, 0.32 to 

 0.34 mm.; height, 0.32 to 0.36 mm. Male, somewhat larger. 



Seen from the side (fig. 1), the shell is about twice as long as high, 

 dorsal margin nearly straight, ventral margin weakly sinuate, nearly 

 the same width throughout, and both extremities evenly and very 

 similarly rounded. 



Seen from above (fig. 2), the shell appears very plump, the breadth 

 being to the length about as 1:2 or as 3 : 5, the greatest breadth lying 

 just posterior to the middle. Anterior end rather more pointed than 



