644 



THE AMERICAN NATURALIST 



[Vol. XL 



as broad and has long delicate l)ri.stles on the inner edge and 

 shorter and stronger bristles on the outer edge. The fifth limbs 

 arc alike (Fig. 6) and 4-jointed. The teritiinal joint is prolonged at 

 the inner angle into a toothed lamella and has a s{)ine at the outer 

 angle. The terminal claw is toothed along its inner ((,'oncave) 

 border and has a naked lamella on the inner side at base. One 

 large and one fright) small egg case. 



Male.— Abdomen long and slender. First joint bristled along 

 the upper part of its posterior edge and with a semicircle of bristles 

 on the lower sin-face. The upper part of the hinder edge of 

 the second joint and the entire posterior edge of the third, fourth, 

 and fifth joints have a crown of triangular spikes. The furca 

 is three times as long as broad and lacks margiiud bristles. 

 The right fifth limb (Fig. 3) has no inner ramus; outer ramus 2- 

 jointed with a terminal claw. First joint of basipoditc has a 

 slender curved process coarsely toothed along its inner edge, the 

 second joint and the first joint of the outer ramus are toothed 

 inside. The second joint of the inner ramus has a bristled spine 

 and a curved terminal claw toothed on the iimer edge and swollen 

 at base. The left fifth limb biramous. The first joint of the 

 basi])odite has a cluster of three or four broad radiating sj)ines. 

 The second joint has coarse teeth on its inner e<lge. The inn«>r 

 lainus is a blade toothed along the distal half of its cnrvcMl outer 

 e.lge. The outer ramus is 2-joitUed; the first joint ha. an outer 

 t^M-minal spin(> and the se<-ond joint en-U irre,uhu-iv in f<.ur >pines. 

 The right antenna . Fi- 1 lia. terniinal .eetion of two joints 

 and has the thinl joint from the end toothed along its anterior'edge. 



Len-th of female I.", nun.; of male 1.2 nun. 



Xarragansetl iiay an<l ( Miarlestown Pon<l. 



Temora longicornis ((). F. Miiller) 



