1178 CRUSTACEA. 



An hujus sedis ? Psammathe, Philippi* — Cephalo thorax 4-articulatus. 



Pedes lmi lamellis duabus confecti. Corpus snbcylindricuin. Antennae 



anticse non appendiculatae. 

 Quoque (?). Idomene, Philippi.] — Cephalothorax 5-articulatus. Pedes lmi 



ac in Cyclope. Corpus subcylindricuni. Appendix abdominis basalis sat 



magna, 2-articulata, setulosa. 

 Quoque (?). Euryte, Philippi.] — Cephalothorax 5-articulatus. Pedes lmi 



unguibus duobus confecti. Corpus subcylindricum. Abdomen angustum. 



Appendix abdominis basalis nulla. 



Subfam. 2. HARPACTICIN^E.— Sacculus ovigerus unicus. 



1. Cephalothorax 4:-articulatus. 



G. 1. Canthocamptus, W estwood.§ — Corpus vix depressum, saepius lineare vel 



sensim angustans. Pedes lmi saapissime parvuli ; 2di biramei, ramis 3-articu- 



latis. Antennae lmae feminae appendiculatae, maris articulatione geniculantes. 



Appendix abdominis basalis sat parva. 

 G. 2. Harpacticus, Edwards.\\ — Corpus vix depressum, saepius quoad abdominem 



subito angustius. Pedes lmi monodactyli, ssepe majusculi; 2di biramei, ramis 



2-articulatis. Antennae lmas ac in Oanthocampto. 

 Gr. 3. Westwoodia, B.^ — Harpactico affinis. Pedes lmi monodactyli sat magni ; 



2di biramei, ramo uno perbrevi, 1-articulato. 

 Gr. 4. Alteutha, Baird** — Corpus valde depressum. Pedes et antennae ac in 



Canthocampto vel Harpactico. Appendix abdominis basalis valde elongata, falci- 



formis. 

 G. 5. Metis, Philippi.-\-\ — Corpus subcylindricum. Frons appendicibus non in- 



structus. Pedes lmi ac in Cyclope. Antennae lmae 2dis minores, appendiculatse. 



Abdomen 5-articulatum. 



* Philippi, Archiv fur Naturgeschichte, vi. 1840, 189. 

 f Ibid., ix. 1843, 63. 



% ibid. 



§ Canthocamptus, Westwood, Partington's Cyclop. Nat. Hist., Art. Cyclops, and The 

 Entomologist's Text Book, 115 ; Baird, Trans. Berw. Nat. Club, i. 97, ii. 154, and 

 Mag. Zool. and Bot., i. 326 ; Cyclopsina (in part), Edwards, Crust., iii. 427 ; Nauplius 

 (in part), Philippi, Archiv f. Nat., vi. 1840, 189; Doris, Koch, Deutschl. Crust., 1841; 

 Ilarpacticus (in part), Dana, Proc. Amer. Acad. Sci., i. 151, 1847. 



|| Arpacticus, Edwards, Crust., iii. 430 ; Nauplius (in part), Philippi, Arch. f. Nat., 

 vi. 1840, 189. 



^[ Arpacticus (A. nobilis), Baird, Trans. Berw. Nat. Club, ii. 155, 1845, Ann. Mag. 

 N. H., xvii. 416, and Brit. Entomost., 214. 



** Alteutha, Trans. Berw. Nat. Club, ii. 155, 1845, and Ann. Mag. N. H. ; xvii. 416, 

 and Brit. Entomost., 216. 



ft Metis, Philippi, Archiv f. Naturg., ix. 59, 1843. 



