146 Rev. Canon A. M. Norman on British Mysidge. 



Professor G. O. Sars has recorded forty-five species of 

 Scliizopoda from Norway (including Finmark). Of these the 

 following have not yet been found in our seas : — 



1 . Ewphausia pellucida^ Dana. Oceanic, 



2. Boreomysis arctica^ Krciyer. 200-400 fath. 



3. tridem, G. O. Sars. 200-400 fath. 



4. megalo2^s, G. O. Sars. 80-200 fath. 



5. Erythrops imcrophthalma, G. O. Sars. 100-500 



fath. 



6. abyssorum, G. 0. Sars. 150-230 fath. 



7. Pseudomma roseuin, G. O. Sars. 200-300 fath. 



8. affine, G. O. Sars. 200 fath. 



9. truncatuni, Smith. 150 fath. 



10. Parerythrops obesa, G. O. Sars. 80-300 fath. 



11. abyssicola, G. O. Sars. 100-300 fath. 



12. robusta, Smith. 60—150 fatli. 



13. Amhlyops abbreviata^ G. O. Sars. 150-300 fath. 



14. Mysideis insignia, G. O. Sars. 100-300 fath. 



15. yrandis, Goes. 30-100 fath. 



16. Hemimysis abyssicola, G. 0. Sars. 150-300 fath. 



17. Mysiddla typica, G. O. Sars. 50-150 fath. 



18. typhlops, G. O. Sars. 150-200 fath. 



19. My sis oculata, Fabr. 



20. mixta, Lilljeborg. 



It will be observed that with the exception of the last two 

 species, which are arctic forms not likely to occur in our seas, 

 all the species in the preceding list are deep-water species, 

 which may be found when the deep-water .^una to the west 

 of our islands shall have been properly investigated. 



Sars's work on the Mediterranean Mysidai contains twenty- 

 one species, and of these fifteen are here recorded as British, 

 together with one not in Sars's list — Hemimysis lamornce. 

 That such a percentage of Mediterranean forms should also 

 be known in our northern seas is quite at variance with the 

 distribution of other orders of the Crustacea, or, indeed, of 

 any class of the Invertebrata. The wider ,range of the 

 Schizopoda is probably due to their more active and swimming 

 habits. Thus likewise from the north vast shoals of Euphau- 

 siidge appear to come southwards and make their appearance 

 in the winter months on our eastern coast — and probably on 

 our western also, though as yet they have only been observed 

 oft' our eastern shores. 



