1462 THE VOYAGE OF H.M.S. CHALLENGER. 



" Body very broad. Head large, deeper than the body, a little produced anteriorly. 

 Eyes large, occupying the whole sides of the head. First pair of antennae fixed at the 

 under-side of the head ; first joint of flagellum tumid, the rest of flagellum subterminal. 

 Second pair fixed at the under-side of the head, angularly folded ($) or wanting (?). 

 Mandibles with palp. Femora of fifth, sixth and seventh pairs of pereiopoda [first 

 joint of Third, Fourth, and Fifth Perseopods] transformed into perfect opercula. 

 Seventh pair [Fifth Perseopods] reduced." 



Genus PlatysceJus, Spence Bate, 1861. 



1816. Typhis, Risso, Hist. Nat. des Crust, des environs de Nice, p. 122. 



1818. „ Lamarck, Hist. Nat. des Anim. sans vertebres, t. v. 



1818. „ Leach, Diet. d. Sci. Nat., t. xii., Art. Crustaces. 



1825. „ Desmarest, Consid. gen. sur la classe des Crustaces, p. 281. 



1825. „ Latreille, Families nat. du Regne Animal, p. 289. 



1825. ., Guerin, Encycl. Meth. Hist. Nat., t. x., Art. Typhis. 



1826. ,, Risso, Hist. Nat. Europe Merid., t. v. p. 91. 



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



1830. „ Desmarest, in Bosc's Hist. Nat. des Crustaces, 6d. ii. 



1830. „ {pars), Milne-Edwards, Ann. d. Sci. Nat., t. xx. pp. 385, 395 (extr., pp. 34, 44). 



1831. ,, Latreille, Cours d'Entomologie. 



1837. „ Burmeister, Handbuch der Naturgesehiehte, Abth, ii., Zool. 



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

 1840. „ O. G. Costa and A. Costa, Catal. de' Crost. del Regno di Napoli. 

 1840. „ {pars?), Lucas, Hist. Nat. des Crust., Arachn. et Myriap., p. 239. 

 1840. „ (pars), Milne-Edwards, Hist. Nat. des Crust., t. iii. p. 94. 



1850. ,, de Natale, Descr. Zool. Crost. del porto di Messina. 

 1852. ,, Dana, Amer. Journ. Sci. and Arts, ser. 2, vol. xiv. No. 41. 

 1852. „ Dana, U.S. Explor. Exped., vol. xiii. pt. ii. pp. 1008, 1443. 

 1855. ,, (pars), Gosse, Manual of Marine Zoology, pt. i. 



1861. Platyscdus, Spence Bate, Ann. and Mag. Nat. Hist., ser. 3, vol. viii. 



1862. Thyropus (pars), Spence Bate, Brit. Mus. Catal. Aniph. Crust., p. 326 (non Dana). 

 1862. PlatysceJus, 1 Spence Bate, Brit. Mus. Catal. Amph. Crust., p. 329. 



1871. Platyscdus, Claus, Unters. uber den Bau und die Verwandschaft der Hyperiden. 



1878. „ Claus, Zool. Anzeiger, Jahrg. i. p. 270. 



1879. Eutyphis, Claus, Die Gattungen und Arten der Platysceliden, pp. 4, 5. 

 1879. Platyscelus, G. M. Thomson, Trans. New Zealand Inst., vol. xi. p. 244. 



1885. Eutyphis, Carus, Prodromus Faunas Mediterranean pars ii. p. 424. 



1886. „ Gerstaecker, Bronn's Klassen und Ordnungen, Bd. v. Abth. ii. p. 482. 



18S7. Eutyphes, Bovallius, Systematical List of Amph. Hyper., Biliang till K. Svensk. Vetensk.- 

 Akad. Handl., Bd. 11, No. 16, p. 45. 



1887. Eutyphis, Claus, Die Platysceliden, p. 31. 



For the original definition of the genus Typhis, see Note on Bisso, 1816 (p. 97). For 

 the brief original definition of PlatysceJus, see Note on Spence Bate, 1861 (p. 327). 



1 "Platyscdus Batei," Streets, 1877, with the wrists of the gnathopods not produced and neither wrists nor hands 

 serrated, cannot belong to this genus, unless based on an incompletely developed specimen. 



