480 Kev. Canon Norman — A Month on 



Eodberg, one specimen in 40 and a second in 250-300 

 fathoms ; also at Trondhjem. 



I have specimens of this species from Shetland and Sleat 

 Sound, Skye, and procured it at Naples in 1887. 



Aristias tumidus, Kroyer, seems to be confined to the 

 Arctic regions ; the specimens in my collection are from 

 Greenland [Hansen] and Spitsbergen {LovSn). 



1855. Lysianassa Audouiniana, Bate, Brit. Assoc. Rep. p. 58 ; Bate 

 and Westwood, Brit. Sessile-eyed Crust. voL i. p. 79 (necauct. plur.). 



1890. Aristias Audouinianus, Meinert, Vidensk. Udbytte * Hauchs ' 

 Togter, Crust. Malac. p. 152, pi. i. figs. 1-6. 



1892. Perrierella crassipes, Chevreux and Bouvier, Bull. Soc. Zool. 

 France, vol. xvii. p. 50. 



1892. Pararistias Audouinianus, Robertson, " Amphip. and Isop. Firth 

 of Clyde," Trans, Nat. Hist. Soc. Glasgow, vol. iii. p. 201. 



1893. Perrierella Audouiniana, J. Bonnier, Ampbip. der Boulonnais, 

 Art. iii., Bull. sci. de France et Belgique, vol. xxiv. p. 175, pi. v. 

 figs. 1-10. 



A single specimen, agreeing on dissection in all points with 

 Bonnier's excellent figures, Laminarian zone, Rodberg. 



It will be seen that much has been written lately on the 

 disputed Lysianassa Audouiniana^ Bate ; and it has now 

 been satisfactorily shown that Perrierella is that species, a 

 conclusion confirmed by the examination of the type specimen 

 in the British Museum by Mr. A. O. Walker. But Bate, 

 like others after him, confused his own species with allies. 

 I have a specimen of this species from Polperro, Cornwall, in 

 my collection which was determined by Bate as his Lysia- 

 nassa Audouiniana. I have also taken Perrierella at Oban 

 in Ascidians, a habitat which is well known as a favourite one 

 of Aristias neylectus. I am also indebted to tiie Copenhagen 

 Museum for a Danish example determined by Herr Meinert. 



69. Callisoma Hopei^ A. Costa. 



1851 . Callisoma Sopei, A. Costa, in Hope, Cat. Crost. Ital. p. 44, and 



plate, fig. 2 ; id. Fauna del Reg. di Nap. Crost. p. 5, pi. viii. bis, 



fig. 1. 

 1857. Scolepecheirus crenatus, Bate, Ann. & Mag. Nat. Hist. ser. 2, 



vol. xix. p. 138. 

 1890. Callisojna crenata, G. 0. Sars, Crust. Norway Amphip. pi. xix, 



fig. 1. 

 1893. Callisoma Hopei, Delia Valle, I. c. p. 839, pi. vi. fig. 11, pi. xvi. 



figs. 1-15. 



Eodberg, 40-100 fathoms. 



The North-European form is identical with the Mediter- 

 ranean species described by A. Costa. I have examined 



