1108 THE VOYAGE OF H.M.S. CHALLENGER. 



Genus Podoceropsis, Boeck, 1860. 



1860. Podoceropsis, Boeck, Forh. ved de Skand. Naturf. 8de Miide, p. 666. 



1862. Neenia, Spence Bate, Brit. Mus. Catal. Amph. Crust., p. 271. 



1862. Neenia, Bate and Westwood, Brit. Sess. Crust., vol. i. p. 471. 



1869. Nurnia, Norman, Last Report on Dredging among the Shetland Isles, p. 285. 



1869. Megamphopus (?), Norman, Last Report on Dredging among the Shetland Isles, p. 282. 



1870. Xenoclea, Boeck, Crust, amph. bor et arct., p. 154. 



1870. Podoceropsis, Boeck, Crust, amph. bor. et arct., p. 162. 



1871. Neenia, Metzger, Eiuundzwanzigster Jahresbericht Naturh. Ges. zu Hannover. 

 1876. Xenoclea, Boeck, De Skand. og Arkt. Amph., p. 561. 



1876. Podoceropsis, Boeck, De Skand. og Arkt. Amph., p. 583. 



1877. ,, Meinert, Crust. Isop. Amph. et Decap. Dania3, p. 151. 



1878. Nxnia, Spence Bate, Crustacea in Couch's Cornish Fauna revised and added to, p. 58. 



1878. Podoceropsis, Stebbing, Ann. and Mag. Nat. Hist., ser. 5, vol. ii. p. 367. 



1879. Neenia, Stebbing, Trans. Devonshire Assoc, p. 520. 

 1882. Podoceropsis, Sars, Oversigt af Norges Crustaceer, p. 30. 



1886. ,, Gerstaecker, Bronn's Klassen und Ordnuugen, Bd. v. Abth. ii. p. 496. 

 18S7. „ Bonnier, Catal. Crust. Malac. Concarneau, p. 108. 



1887. ,, Chevreux, Catal. Crust. Amph. Bretagne, p. 27. 



For the original definition of the genus, see Note on Boeck, 1860 (p. 324); for the 

 definition oiNsenia, see Note on Spence Bate, 1862 (p. 336); for that of Megamphopus, 

 which I only with hesitation make a synonym of the present genus, see Note on Norman, 

 1869 (in Appendix); for the definition of Xenoclea, see Note on Boeck, 1870 (p. 402). 

 In 1876, as in 1870, Boeck defines it as follows, as third genus of the Photinse : — 



" Upper Antennas with the third joint of the peduncle elongate ; accessory flagellum 

 wanting. 



" First Gnathopods with the w T rist elongate. 



" First and Second Perseopods with the first joint very broad. 



" Third Uropods biramous, the rami about equal to one another in length. 



" Telson apically sinuate." 



Of Podoceropsis, as sixth genus of the Microdeutopinae, he gives the following 

 definition : — 



" Upper Antennse with the third joiut of the peduncle elongate ; accessory flagellum 

 wanting. 



" Second Gnatlioptods larger than the First, and in the male much stronger than in 

 the female. 



" First and Second Per&opods with the finger small. 



" Third Uropods with the rami ecpial to one another." 



To Podoceropsis Boeck assigns the one species, Podoceropsis sophiw, to which he 

 makes Nwnia tuberculosa, Spence Bate, a synonym ; to Xenoclea he assigns the one 

 species, Xenoclea batei, which is almost certainly the same as Neenia rimapalmata, 

 Spence Bate. In Nwnia rimapalmata, Spence Bate, in Megamphopus cornutus, 



