130 Canon A. M. Norman on British Amphipoda. 



impossible to say. They compare it to Hyperia galha ; 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 : — " Dactyl i of three 

 posterior pairs of pereiopoda long, sharp, and furnished with 

 a bunch of cilia in the middle." 



Genus 2. Hyperoche, Bovallius. 



[Sjn. = Metoecus, Kroyer (iu use) = Taun'a, Boeck (not Dana). J 

 2. Hyperoche tauriformis (Bate & Westwood). 



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



pi. iii. fig. 15. 

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



Isles," Brit. Assoc. Rep. for 18G8, p. 287. 

 18(i9. Hyperia tauriforniis, Bate & Westwood, (1) vol. ii. p. 519. 

 1872. Taiiria medusarum and Tauria abyssorian f, Boeck, (138) pp. 82 



& 83, pi. i. fig. 2. 



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

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

 tauriformis, p. 115. 



1890. Hyperoche Kroyeri, G. 0. Sars, (142) p. 9, pi. iv. 



Hah. Banff (T. Edimrd) ; Shetland {A. M. N.) : Mus. 

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

 Scott) ; near Puffin Island, N. Wales [a. 0. W.). 



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

 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 preheyisilis, Bate & Westwood, (1) vol. ii. p. 540. 

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

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

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



The only known example " was taken at Banff by Mr. T. 

 Edward." The characteristic feature is the subchelate 

 character of the posterior pairs of peraeopods ; but this 

 character Bovallius thinks may be a feature depending only 

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

 described just such a difference in the posterior perseopods 

 in his Hyperoche Martinezii^ in which species these legs are 

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

 the adult (as in H tauriformis) . 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 ; aud 

 similarly repeated numbers must be interpreted in the same w.ay through- 

 out these papers. 



