340 GEOLOGICAL SURVEY OF THE TERRTTORTES. 



dnced. The caudal appendages are nearly twice as long" as in B. colo- 

 rdden.sis. The eggs are more numerous (about 50 contained in the ovisac) 

 and much smaller than those of B. color adeiisis, being about one-half as 

 large. The feet are well developed; the 5th endite square and hol- 

 lowed out a little on the outer edge; the 6th is long and more pointed 

 than in the other species of Branchiuecta; the gill is large, as is also 

 the oval broad flabellum. 



Male, length of body, 8"""; 2d antennae, 3"""; length of 2d joint, 1^"""; 

 caudal appendages, 1'"". 



Female, length of body, 15™'"; ovisac, 4-5™"; caudal appendages, 



Oram 



This species differs remarkably, especially in the long caudal append- 

 ages, and in the large pointed 6th endites of the feet; It may ?it 

 once be distinguished from Branchinecfa coloradensis by the shorter 2d 

 antennae, the basal joint being one half shorter, and the 2d joint very 

 short, while the inner projection or spur is much larger and more pointed 

 than in B. coloradensis, and the caudal appendages are much, larger, 

 Avhile the ovisac is much shorter than in that species. The eggs are of 

 the same size as those of B. paludosus. 



The specimens occurred in a pool at Wallace, Kansas, in company 

 with the other Phyllopods from that place. 



This species is named in honor of Prof. Joshua Lindahl, of Augustana 

 College, Rock Island, 111., who collected the specimens examined, witk 

 many other Phyllopods which he kindly lent me for study. 



Genus BEAIl^CHIPUS Schaeffer (in part). 



BrancMpus Schaefier (in part), Elementa Entomologica, 1766 (type B. pisciformis ^='? B. 



stagnalis Ex. Verrill). La,treille, Regue Animal ; Leach. Milne-Edwards, 



Crustac6s, iii, 1364 (iu part), 1840. 

 Clnrocepliahis Dana (in part), iion B6u6dict-Pr6vost, 1803; Jnrine, Thompson, Baird. 

 ^raHc/(i^MS Verrill, Amer. Journ. Science, xlviii, 250, Sept, 1869. 

 BrancMpus (and Eubranchipun) Verrill (in part), Proc. Amer. Assoc. Adv. S^., July, 



1870. 



Body large and very stout; head large; male claspers elbowed, large 

 and thick, complex, varying much in form; 1st joint very stout and 

 thick, nearly straight, with a stout inward-pointing spine at base ; 2d 

 joint varying in form, usually simple and straight, chitinous, bent a 

 little at the tip. Head of male wiih a pair of frontal appendages hang- 

 ing down between the male claspers and varying much in form, being 

 long, slender, filiform, and simple (in B. stagnalis), forming two broad, 

 flat triangular lobes with crenulated edges (in B. vernalis), or very large 

 and deeply and finely lobulated [B. grubei). The 11 pairs of feet are 

 much as in Branchinecia, but usually the 5th endites are larger and 

 the edge less square than in Branchiuecta, and the 6th endites are 

 larger and more pointed. The i)enis is large and broad, in B. stagnalis 

 quite deeply cleft, or [B. vernalis) only slightly so, the cirrus long and 

 slender. Caudal appendages long and slender, nearly twice as long as 

 is usually the case iu Branchiuecta \B. lindahli excepted). 



Female with the body long, the head large, caudal appendages as in 

 the male, the ovisac broad and short, bottle-shaped, the opening trans- 

 verse, at the end of a short neck. 



The type of this genus is BrancMpus stagnalis (Linn.) of Europe, and 

 ill this country it is re[)reseuted by B. veriialis. 



As limited by Milne-Edwards, the genus was too comprehensive, be- 

 ing comijosed of three generic forms, since he included in it B. sj^inosus 



