CRUSTACEA OF NORTHUMBERLAND AND DURHAM 38 1 



Amphiascus intermedius (Scott). 



1897. Stenhelia intermedia, Scott, Marine Iiivertebrata of 

 Loch Fyne. 15th Annual Report Fishery Board for 

 Scotland, p. 169, pi. ii., figs. 10-21. 

 1906. Amphiascus intermedius, G. O. Sars (6), vol. w., 

 p. 169, pi. ex. 

 A single specimen found among dredged material from a 

 depth of 25 fathoms off Hartlepool (G. S. B.) D. 



Delavalia palustris G. S. Brady. 



1868. Delavalia palusti'is, Brady, Nat. Hist. Trans. North- 

 umberland and Durham, vol. iii., p. 134, pi. v., figs. 

 10-15, and (3) vol. ii., p. 43, pi. 1., figs. 1-8. 

 1906. Stenhelia palustris, G. O. Sars (6), vol. v., p, 185, 

 pi. cxxii. 

 Found in brackish pools near the mouth of the Seaton 

 Burn, Northumberland, and in similar pools on the Aln 

 above Alnmouth (G. S. B.) 



Professor G. O. Sars considers (loc. cit.) that the genus 

 Delavalia is really identical with Stenhelia Boeck, but Boeck's 

 definition of Stenhelia assigns to the first pair of feet a 

 structure " similar to those of Dactylopus," and of this latter 

 genus he says of the first pair of feet that " the inner branch 

 is elongated, three-jointed, the first joint being very long and 

 bearing two prehensile bristles : the inner branch generally 

 smaller, with its middle joint not much longer than the other 

 two " — both branches being therefore three-jointed. But one 

 of the most distinctive characters of Delavalia is the two- 

 joi7ited and non-prehensile inner branch of the first foot. We 

 therefore prefer to retain that generic name. N. 



Delavalia longicaudata (Boeck). 



1872. Stenhelia longicaudata, Boeck, Nye Slaegter og Arter 



af Saltvands-Copepoder. Chr. Vid. Forh., p. 49. 

 1880. Delavalia reflexa, Brady (partim) (3), vol. ii., p. 45, 



pi. Ii., figs. 9, 14. 

 1906. Stenhelia longicaudata, G. O. Sars (6), vol. v., p. 190, 

 pi. cxxv., fig. I. 

 This species is included in our list on the faith of Professor 

 G. O. Sars, who remarks that " some of the figures given by 



