492 Rev. Canon Norman — A Month on 



specimens ; but the whole series appear to point to a process 

 of gradual development of that organ with increasing size. 



168. Ischyrocerus megacheir^ G. 0. Sars. 



Rodberg, 40-150 fathoms ; several specimens. 



May at once be recognized by examination of some very 

 small and microscopic peculiarities : 1st by the uncinate 

 ramus of the last uropod having four (three to five, four more 

 commonly) tooth-like serrations on the margin ; 2nd, by the 

 dactyli of the hinder peraeopods being very minutely serru- 

 lated on the anterior two thirds of their length. 



= Omscus vululaior, 0. F. Miill.,= Gammarus longicornis, Fabr. 

 Between tide-marks at Trondhjem, near the mouth of the 

 Nidd. 



170. Corophium affine, Bruzelius. 



1869. Corophium tenuicorne, Norman, " Last Report Shetland Dredg- 

 ng," Brit. Assoc. Rep. for 1868, p. 286. 



30-40 fathoms. 



In Britain I have found this species in St. Magnus Bay, 

 Shetland, in Loch Fyue, and at Cumbrae in the Firth of 

 Clyde. 



171. Coro'pMum crassicornej Bruzelius. 

 = Corophium spi?iicorne, Bate, $ . 

 Trondhjem, in 5-10 fathoms. 



172. Neohela monstrosa, Boeck. 



An imperfect specimen of this rare and remarkable Am- 

 phipod taken in 150 fathoms at Rodberg. 



The species was described from an imperfect specimen 

 taken in the Christiania Fiord ; a perfect specimen was taken 

 by the Norwegian North-Atlantic Expedition in thcPorsanger 

 Fiord, Finmark, in 127 fathoms ; these are the only recorded 

 occurrences of the species on the Norwegian coast. By the 

 expedition just mentioned mutilated examples were dredged 

 to the north of Finmark, to the north of Faroe, and to the 

 west of Spitsbergen, down to a depth of 1215 fathoms; a 

 male and female have been recorded by Hansen from Green- 

 land ; and it is probable that the Neohela phasma, S. I. 

 Smith, of which the type was taken off the N.E. American 

 coast in 372 fathoms, is the same species, since Smith's 



