THE FAIRY SHRIMPS (PHYLLOPODA) 



675 



77 (76) Shell globose with 13 lines of growth; umbones prominent, one- 

 third length of shell from anterior end. 



Est her ia sclosa Pearse igi3. 



This species resembles Eslheria bclfraRci in many resiK-cts hut is ca-sily 

 distmguished by the smaller number of lines of growth and the length of 

 the dorsal setae at the anterior edge of the telson. Collected in eastern 

 Nebraska from small pools. 



Fig. 1048. Estheria setosa. Shell, side view. X .?. 



78(75) Flagella of second antenna 17- and 16-scgmented 79 



79 (80) Shell swollen; umbones rather prominent, one-fourth length of shell 



from anterior end; dorsal margin short, sudtleniy sloping at 

 posterior end; telson with larger teeth interpolated l)etwecn 

 the smaller ones Estheria mexieana Claus 1 860. 



A species of very wide range extending from Lake Winnipeg 

 through Kansas, Nebraska, Kentucky, Ohio, and New Miticn 

 into Mexico. It is rather variable in its structure. 



Fig. 1049, Eslheria mexieana. Shell, side view. X4. (.After i';iik:ir'l 



80 (79) Shell somewhat globose; umbones more prominent than in Estheria 



mexieana, slightly nearer the anterior end than in Estheria 

 heljragei Estheria morsei Packard 1S71. 



South Dakota, Nebraska. Fig. 1049 shows the general structure of this species. 



IMPORTANT PAPERS ON FRESH-WATER PHYLLOPODA 



Calman, W. T. 1909. Crustacea. Lankester's Treatise on Zoolog>', Pt. 



VII, Fasc. 3: 29-55. London and New York. 

 Daday, E. 1910, Monographic systematique des Phyllopodes Anostraces. 



Ann. Sci. Natur., (9) 11: 91-492, 84 figs. 

 Hay, 0. P., and W. P. 1889. A contribution to the knowledge of the Genus 



Branchipus. Amer. Natur., 23: 91-95. 

 Packard, A. S. 1883. A Monograph of the Phyllopod Crustacea of North 



America, with Remarks on the Order Phyllocarida. 12 Ann. Rept. U. S. 



Geol. Surv.: 295-590, 39 pis., i Map. 

 Pearse, A. S. 1913. Notes on Phyllopod Crustacea. 14 R^'pt. Michigan 



Acad. Sci.: 191-197, 3 pis. 

 Shantz, H. L. 1905. Notes on North American Species of Branchinecla and 



their Habits. Biol. Bull., 9: 249-264; pis. 10-12. 



