NO. 1589. FRESH-WATER CRUSTACEA— CUSHMAN. 709 



This species was found in but one of the lots of material, that 

 from St. jNIarys River, Labrador, Julj^ 12, 1906. But few specimens 

 were present. The small number of specimens found is surprising, 

 as this species is a northern one, beino- found in the northern part 

 of Europe and America. 



Genus MACROTHRIX Baird, 1843. 

 MACROTHRIX HIRSUTICORNIS Norman and Brady. 



Plate LX. figs. 5-7 ; Plate LXI, fig. 1. 



Mncrothrir hlrsuticonti.s Norman and Brady, A Monograph of the British 

 Entomostraca, Nat. Hist. Trans, of Northumberland and Durham, I, 

 1867, p. 10, pi. XXIII, figs. 6, 7. — Lilljeborg, Cladocera Suecite. Nova 

 Acta Reg. Soc. Se. Upsala, 3d ser.. XIX. p. 34G, pi. v. figs. G-1-1. 



Length of females a little less than 1 mm. 



The general appearance of this species is shown in Plate LX, fig 5. 

 The pigment fleck is nearly as large as the eye and is directly below 

 it. The antennula (Plate LX, fig. 6) is long and club-shaped with 

 a long sensory seta near the proximal end. The anterior margin has 

 sevei'al rows of short setae increasing in number in the rows as the 

 distal end is approached. The posterior margin is nearly smooth. 

 At the distal end of the antennula are two long lanceolate projec- 

 tions and several shorter more slender ones. 



The antenna (Plate LXI, fig. 1) has the outer two joints of each 

 ramus with a series of short setse. The three-jointed ramus has a 

 long process from the basal joint with short spines instead of the 

 ciliary seta^ of the others. The post-abdomen is shown in Plate LX, 



fig- ". 



A few specimens of this species were found in the material from 

 Funk Island, Newfoundland, collected by Mr. Bryant, May, 1906. 



This species is widely distributed in the Old World but has not 

 previously been reported from America. In some of its characters 

 this approaches the more northern forms of the species. 



Genus ACANTHOLEBERIS W. Lilljeborg, 18S3. 



ACANTHOLEBERIS CURVIROSTRIS (O. F. Muller). 



Plate LXI, figs. 2-1. 



Daphne Clirvirostris O. F. Muller, Zoologiiie Danicoe Prodromus, 177G, p. 



200, No. 2403. 

 AcanthoJcheris curvirostris Lilljeborg, De Crustaceis ex ordinibus tribus; 



Cladocera, Ostracoda, et Copepoda, in Scania occurrentibus, 1853, p. 



52, pi. IV, figs. 5-7; pi. xxiii, figs. 10, 11: Cladocera Suecijip, Nova Acta 



Reg. Soc. Sc. Upsala, 3d ser., XIX, 1900, p. 375, pi. lvii, fig. 17; pi. 



LVIII, figs. 1-17. 



Length of females about 1.5 mm. 



The outline and general appearance of this species is shown in 

 Plate LXI, fig. 2. The eye is large and the pigment fleck very small 



