REPORT ON THE AMPHIPODA. 79 



He makes the following remarks upon the Amphipoda — " Le genre phronime (phrmiima) est 

 encore du meme naturaliste [Latreille]. II comprend un animal trfes-singulier, qu'on a observ6 

 dans un corps gelatineux transparent, qui n'a que deux antennes et dix pattes dont la 

 troisieme paire, plus longue que les autres, est armee de deux pinoes ; le corps se termine 

 par plusieurs filets fourchus. Le genre thalitre (thalitrus, du meme auteur) ressemble beau- 

 coup a celui des crevettes. Les crevettes {f/amwarux, Fab.) difl'ferent de tons les autres 

 astacoides par la forme du second segment du corps, lequel n'est pas plus long que ceux qui 

 viennent imm&liatement apres, par les appendices fourchus qui se remarquent h, Fextrdmite 

 et sur les cot^s de la queue ; enfin par I'immobilit^ des yeux, qui sont a-peu-pres dispos(5s 

 comme ceux des aselles et des cloportes, insectes avec lesquels les crevettes semblent se lier. 

 Ces crustac^s vivent dans les eaux douces et salees; ils nagent fort rapidement et tou jours 

 sur le c6t6." 



The sixtieth or last family of the Insects, among the Aptera, is called Quadricornes or Polygnates, 

 and contains three genera, Physode, Cloporte, Armarlide, with the remark that -pliymde 

 (jihysodes, Fab.) answers to the ascllote family of Latreille. He considers that the "Poly- 

 gnates semblent faire le passage des insectes aux crustaces, dont ils different seulement par 

 le defaut de branchies." 



1806. Latreille, P. A. 



Genera Crustaceorum et Insectorum secundum ordinem naturalem in familias 

 disposita, iconibus exemplisque plurimis explicata. Tomus Primus, Parisiis et 

 Argentorati, 180G. (Tlie otlier three volumes 1807, 1809.) 



Of the twelve classes into which Latreille here distributes animals, the Crustacea are the eighth, 

 invertebrates with distinct nerves, "Cor; branohia; ; medulla spinalis gangliis plurimis; 

 pedes." Of the Crustacea, the Malacostraca form the second Legion ; containing two Orders, 

 the Decapoda and the Branchiogastra, the latter thus defined, " Caput a thorace distinctum ; 

 branchiae exterute, inferas ; pedes ssepissime quatuordecim." Of the Branchiogastra, the 

 first Family are called Squillares, the second Gammarinss or Crevettines. These latter 

 include the genera Phronima, Talitrus, Ganimarus, Corophium, Caprella, Cyamus. The 

 new genus Coropliumi is thus defined : — Cauda appendicibus articulatis, subcylindricis. 

 Antennx inferos crassissimfe, articulis quinque, seta nulla articulata apicalL Pedes duo 

 antici manu parva (ungue mobili, pollice instruota)." The type species is Corophiimi 

 longicorne, taking its specific name from the synonym, Gammarus longicornis, Fab., instead 

 of taking it, as it should do, from the earlier synonym, Oniscics vohdafor. Pall. A final 

 note remarks, " Genera Symethis, Posydon, mihi iguota." Phronima sedentaria and its 

 habitation are figured on pL ii. 



The Tetracera are the first Legion of the Ninth Class, Apterous Insects, and comprise two 

 Families, the Asellota and the Oniscides. 



1808. Montagu, George. 



Description of several Marine Animals found on the South Coast of Devonshire. 

 Transactions of the Linnean Society, vol. ix., London, mdcccviii. ]3p. 81-114, 

 pi. ii.-viii. (Read June 18, 1805). 



At page 92 Montagu gives " Cancer Gammarus Locusta. Tab. iv. Fig. 1. Cancer Locusts. 

 Gmcl. Syst. p. 2992. Turt. Linn. iii. p. 760. Oniscus Garamarellus. Pallas Misc. Zool. 

 t. 14. /. 25. Id. Spic. Zool. 9. t. 4. f. 8." Although the accessory flagellum of the upper 



