130 Canon A. M. Norman on British AmpMpoda. 



impossible to say. They compare it to Hyperia gaJha ; but 

 the following sentence in the description of this small form, 

 " rather more than three-twentieths of an inch long/' found 

 by Edward at Banff, is very puzzling : — " Dactyli of three 

 posterior pairs of pereiopoda long, sharp, and furjiished with 

 a bunch of cilia in the middle J ^ 



Genus 2. Hyperoche, Bovallius, 

 [Syn. = Metoecus, Kroyer (in U3e) = Tawia, Boeck (not Dana). J 

 2. Hyperoche tauriformts (Bate & Westwood). 



1838. Metoecus medusarum, Kroyer, Gronlands Amfipoder, p. 288, 



pi. iii. fig. 15. 

 1869. Metoecus mechisarum, Norman, " Last Report Dredging Shetland 



Isles," Brit. Assoc. Rep. for 1868, p. 287. 

 1869. Hyperia tauriformis, Bate & Westwood, (1) vol. ii. p. 519. 

 1872. Tmtria medusarum and Tauria abyssorum\^ Boeck, (138) pp. 82 



& 83, pi. i. fig. 2. 



1889. Hyperoche Kroyeri, Bovallius, /. c. p. 87; Hyperoche ahyssorum, 

 p. 94; Htjperoche Liitkeni, p. 97, pi. vii. figs. 1-26; and Hyperoche 

 tauriformis, p. 115. 



1890. Hyperoche Kroyeri, G. O. Sars, (142) p. 9, pi. iv. 



Hob. Banff {T. Edward) ; Shetland {A. M. N.) : Mus. 

 Nor. Firth of Forth; Firth of Clyde; Loch Fyne {T. 

 /Scott) ; near Puffin Island, N. Wales {A. 0. TV.). 



Distrib. Faroe Channel, * Triton ' Exped. {Sir J. Murray) ; 

 Greenland, and lat. 52° 53' N., long. 23° 44' W., surface, in 

 great abundance, ' Valorous' 1870: Mus. Nor. The species 

 has an arctic range from Siberia to Greenland. 



2*. Hyperoche prehensilis (Bate & Westwood). 



1869. Hyperia prehe7isilis, Bate & Westwood, (1) vol. ii. p. 540. 

 1885. Hyperoche prehensilis, Bovallius, System. List of Ampliip. 

 Hypeiiid. (K. Svenska Vet.-Akad. Haudl. vol. ii.), p. 19 (sep. copy). 

 1889. Hyperoche irrehensilis, Bovallius, Coutrib. &c. p. 93. 



The only known example " was taken at Banff by J\Ir. T. 

 Edward.*' The characteristic feature is the subchelate 

 character of the posterior pairs of peraaopods ; but this 

 laracter Bovallius thinks may be a feature depending only 

 n the young stage of the animal. Indeed Fr. Miiller has 

 Jescribed just such a difference in the posterior perreopods 

 in his Hyperoche Mariinezii^ in which species these legs are 

 prehensile in the young (as in H. prehensilis) and simple in 

 the adult {aa in H taurifbi-mis) . It would appear therefore 

 that the former will probably be proved to be the young stage 



t First described by Boeck in 1870. 



* I repeat the previous number here with an asterisk, because I regard 

 H. prehensilis as not a satisfactorily established British species ; and 

 similarly repeated numbers must be interpreted in the same way through- 

 out these papers. 



