STATE GEOLOGIST. 87 



LEGION II. PHYLLOPODA. 



TRIBE I. ARTBMIOIDEA. 



Family 1. Artemiadae. (Branchipodidge.) 

 Family 2. Nebaliodse. 



TRIBE II. APODID^. 



Family 1. Apodidee. 



TRIBE III, LIMNADIOID^. 



Family 1. Limnadidse. 



Note — Other genera have been added to those given by Dana, and changes 

 made. The family Estheriadse seems, however, to be equivalent to Limnadidse. 



LEGION I. LOPHYROPODA. 



Bibliography. — Lophyropa, Latreille, Cuv. Regne An., 1677; 



Lophyropoda (in part), Leach, Diet. Sci. Nat., XIV., 554. 



Gray, Cat. Brit. Crust. Brit. Mus., 1850, 



100. 



' Baird Brit^ Entomost., 138. 



Cranchiopodes franges (in part), Lamark, Hist. Ans. Yert. 

 Characters. — Feet normal and not greatly multiplied in number. 



TRIBE I. CYCLOPOIDEA. 



Bibliography* — Carcinoida (in part), Latreille. 



Copepodes, Edtvards, Crust., iii., 411. 



Copepoda, Baird, Trans. Berw. Club, ii., 1875. 



Baird, Brit. Entomost., 182. 



Cophyropoda, Burmeisfer, Organiz. of Trilobites. 



Copepodita, Gray, Cat. Brit. Crust. Brit. Mus., 1850. 



Crustacea copepoda (Cyclopacea), Dana, Proc. Ardes. Acad. Sci. 

 and Art., 1847. 



Cyclopoidea, Dana, Rep. Wilkes' Exp. Ex., p. 1020, 

 Characters. — Body elongate, straight, never incurved. Cephalothorax and 



abdomen with few joints. Feet and jaws 16 to 18. The 6-10 



posterior thoracic feet are double, foliacecus, with the last often 



prehensile. 



This is a very extensive and widely distributed division, and there is a greater 

 unity of plan seen in the structure of the animals comprised in it than in other 

 divisions of similar importance. These creatures are distributed over the world, 

 in both fresh and salt water, and the numbers may doubtless be reckoned by 

 thousands, but little attention has been devoted to the subject, and our knowl- 

 edge is quite meagre. 



