338 REV. T. R. R. STEHniNO ON CUnSTACEA 



flescribes specimens of Atyloides serraticauda Stebhing \\ith 

 Seven teeth on the margin above discussed, instead of only two 

 in the specimen first described. The moral which Mr. Walker 

 draws as to the untrustworthiness of small characters for specific 

 distinction is enforced by the additional example in Tryjyhosites, 

 a genus remote from Atyloides. But it is dillicult to proiit l)y 

 the M'arning when a single specimen with apparently novel 

 characters has to be classified. 



Family Metopid-e. 



Genus Metopoides Delia Valle. 

 Metopoides parallelocheir (Stabbing). 



1888. Metopa 2^ct,rallelocheir Stebbing, Rep. Yoy. • Challenger,' 



vol. xxix. p. 762, pi. 43. 



1893. Metopoides ,, Delia Valle, F. Fl. Neapel, vol. xxi 



p. 907. 



1906. „ „ Stebbing, Das Tierreich, vol. xxi. 



p. 186. 



The specimens obtained by Mr. Vallentin at the Falkland 

 Islands had unfortunately become too dry for satisfactory ex- 

 amination in detail before I attempted dissection. Beyond 

 identifying the species I can add nothing to the description and 

 figures siipplied in the ' Challenger ' report and ' Das Tierreich.' 

 The depth of 100 metres from which the ' Challenger' specimen 

 purports to come loses such authority as it had by compai'ison 

 with Mr. Vallentin's taking of the species at very small depths. 

 They were found by him "in the branchial sac of a simple 

 ascidian." 



Family Pontogeneiid.e. 

 Genus Paramcera Miers. 



1875. Paramaira Miers, Ann. Nat. Hist. sei\ 4, vol. xvi. p. 75 

 (see also Rep. Voy. ' Challenger,' vol. xxix. p. 447). 



Paramcera austrinus (Bate). 



1914. Farammra austrinus (Bate), Proc. Zool. Soc, p. 364. 



Specimens • which I am inclined to include in this seemingly 

 variable species were taken by Mr. Vallentin some nine years 

 ago at Crooked Inlet. In regard to the first of them he writes : 

 " It was found under the mantle of the common limpet Patella 

 cfnea. Colour, body ivory-white with a dark red line running 

 down directly in the median line from head to tail. Eyes fiery- 

 red." It is remarkable that the body colouring was retained till 

 [12] 



