A HISTORY OF NORFOLK 



(Montagu), Paramphithoe bicuspis (Kroyer).' For the first of these the 

 name should now stand as Unciola crenatipalma (Bate) ; for the second, as 

 Podoceropsis rimapalma (Bate). Gammarus pulex{h\nr\.), in dredged material 

 from the Norfolk broads, has been recorded by Brady and Robertson.^ 

 Recently the occurrence of a well-shrimp in Norfolk has been reported 

 by Dr. Sidney Harmer, F.R.S. ' In January, 1899,' he says, 'I received 

 two living specimens of Niphargus from my father's house at Cringleford, 

 near Norwich. The well, which is about twenty-five years old, is forty 

 feet deep, including some three or four feet of water. It is sunk in the 

 chalk, which at that spot comes within two or three feet of the surface 

 and is overlaid by humus only.' ' 



He determines this interesting amphipod to be Niphargus aquilex 

 (Schiodte). The distribution of well-shrimps obviously suggests the 

 same problem as that which Mr. Skertchly discusses about the prawns 

 in the silt, the question being. How in the world did they get there ? 

 As already intimated the answer, to my thinking, is easy, that the channels 

 which carry the water carry also the crustaceans. 



For another welcome addition to the amphipods of the county we 

 are indebted to Mr. Henry Scherren, F.Z.S., who discovered Corophium 

 crassicorne, Bruzelius, in a very unexpected situation. When sending me 

 the specimens, ihe says, in a letter from Yarmouth, August 7th, 1896 : 

 ' They were taken in the river Thurne, not far from the broad which 

 the Law Courts recently declared was not tidal. The nests were on 

 Cordylophora lacustris, which is extremely abundant. To-day I have found 

 C. lacustris at Acle Bridge, on the Bure. This last is a new locality 

 for C. lacustris, and I assure you I was surprised to meet with this 

 crustacean [the Corophium] there. I have secured good specimens of 

 the Hydrozoon [the Cordylophora] with nests [of the Corophium] on 

 the branches for the British Museum.' Mr. Scherren was subse- 

 quently at the pains to ascertain that the salinity of the water in 

 which this usually marine amphipod abounded was only about one- 

 thirtieth of that of the sea water off Yarmouth Jetty. 



To dwell still further on the feeble catalogue of Norfolk amphipods, 

 I must once more recur to Mr. Palmer's Perlustration. At page 229 he 

 records that ' On the 8th of July, 1784, a small whale {Balcena mysti- 

 cetus) was taken near Yarmouth.' Also, he says, ' In 1857 a whale was 

 stranded on Winterton Beach, which measured forty-five feet in length.' 

 But our present concern with the stranding of the Greenland or Right 

 Whale on the coast of Norfolk relates only to the parasitic amphipod, 

 Cyamus ceti (auctorum), or Cyamus mysticeti (Liitken), the curious so-called 

 whale-louse, an amphipod of the tribe Caprellidea, which is almost 

 invariably the whale's companion. 



Passing now from the Malacostraca to the next great division of the 

 Crustacea, we shall have the assistance of some very acute and diligent 



' Nordseefahrt der Pommerania, pp. 278—282. 



* Annali and Magazine of Natural History, Ser. 4, vol. vi. p. 7, 1870. 



* Tram. Norfolk and Norwich Naturalists' Society, vol. vi., pt. v. pp. 489, 490. 



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