REPORT ON THE AMPHIPODA. 1113 



" Body compressed or subdepressed, with the back rounded. 



" Upper Antennas with the accessory flagellum short or absent. 



" First Cnathopods smaller than the Second, with the hand subcheliform. 



"Second Gnathopods with the hand subcheliform, sometimes cheliform. 



" The Fourth Permvpods longer than the Third, the Fifth than the Fourth. 



" Third Uropods uniramous or biramous. 



" Telson thick." 



To the Amphithoime Boeck assigned only the genera Amphithoe and Sunamphitlioe ; 

 to the Podocerinse Podocerus, Janassa, and Cerapus, of which Janassa is pretty 

 certainly a synonym of Podocerus, and Cerapus not the true Cerapus but a synonym of 

 Fricthonius, Milne-Edwards. In 1882, Sars, dropping the subfamilies, accepted the 

 family Podoceridse for the genera of both, naming them Amphithoe, Sunamphitlioe, 

 Podocerus, Janassa, Erichthonius. 



For the original definition of the family Podoceridse, see Note on Leach, 1814 

 (p. 86). 



Genus Amphithoe? Leach, 1813-1814. 



1813. Gammarus [Ampithoe), Leach, Crustaceology, Edinburgh Encyclopaedia, vol. vii. p. 403. 



1814. Ampithoe, Leach, Crustaceology, Appendix, Edinburgh Encyclopaedia, p. 432. 



1815. „ Leach, Trans. Linn. Soc. Lond., vol. xi. pt. ii. p. 360. 



181G. ,, Leach, Annulosa, Encyclopaedia Britannica, Supplement, p. 425. 



1816. Cymadusa, Savigny, Memoires sur les Animaux sans vertebres, pt. i. p. 109. 



1816. Amphithoe, Latreille, Nouveau Diet, d'hist. Nat., t. i. 



1817. Amphitoe, Latreille, Le Regne Animal, t. iii. 



1818. Ampithoe, Latreille, Tableau Encyclopedique, pi. ccexxxvi. fig. 33. 

 1818. Ampithoe, Leach, Crustaces, Diet. d. Sci. Nat., t. xii. p. 75. 



1825. Amphithoe, Audouin, Descr. de l'Egypte, Explic. des Planches (pi. xi. figs. 4, 6). 

 1825. „ Desmarest, Consid. gen. sur la classe des Crustaces, p. 268. 



1825. „ Latreille, Fam. Nat. du Regne Animal. 



1829. Ampithoe, Latreille, Le Regne Animal, t. iv. 



1830. Amphithoe, Milne-Edwards, Ann. d. Sci. Nat., t. xx. (extract, p. 24). 

 1832. Amphithoe, Zenker, De Gammari Pulicis Fabr. Hist. Nat., p. 1. 



1836. 2 Amphitoe, Guerin-Meiieville, Iconographie du Regne Animal, t. ii. iii pi. xxvi. fig. 9. 

 1837. Amphithoe, Burmeister, Handbuch der Naturgeschichte. 



1837. ,, Rathke, Beitrag zur Fauna der Krym, Mem. Acad. Imp. St. Petersbourg, 



torn. iii. p. 379. 



1838. Amphitoe, Milne-Edwards, Hist. Nat. des Anim. sans vertebres, torn. v. 

 1840. Amphithoe, Lucas, Hist. Nat. des Crust. Arachn. et Myriap., p. 229. 



'Since the very general acceptance of the form Amphithoe, I have considered that it would be inconvenient and 

 pedantic to revert to the oddly spelt form Ampithoe, which Leach adopted at the first suggestion of the genus in 1813, 

 and continued to use in his later writings. 



2 If the genus Sunamphitlioe, Spence Bate, should be united to Amphithoe, as being separated by only one mark of 

 distinction of doubtful generic value, Anisopm, Templeton, 1836, would then have to be included in the synonymy of 

 Amphithoe. 



(ZOOL. CHALL. EXP.— PART LXVII. — 1888.) Xxx 140 



