Species of AmjyJiipoda. 559 



vol. iii. 1889, p. 198) ; on this occasion they were in con- 

 siderable numbers, and therefore probably not accidental, 

 but feeding either on, or, more probably, with the polypes. 

 Dr. W. M. Tattersall informs nie that he has found it 

 " extremely abundant wherever Alcyonium digifafum is to be 

 found, and, in deep water, commonly associated with other 

 Alcyonarians such as LophoheJia ; also clinging to such 

 Compound Ascidians as Leptoclitnuni." He thinks, how- 

 ever, that it is rather a case o£ protective coloration than 

 comniensalisni — a question that will require careful aquarium 

 and laboratory observations to solve. 



Amphipoda. 



Euonyx chelatus, Norman. 

 More abundant tlian usual. 



Lysianassa plumosa, Boeck. 



A single young specimen, length 6 mm. This is a rare 

 species on our coasts. When fresh its colour distinguishes 

 it at a glance, the body-segments, especially the first two or 

 three and those of the pleon, being blotched with pink or 

 orange, as described by G. 0. Sars. Canon A. M. Norman 

 doubts the specific distinction between this species and 

 L. ceratinus, Walker, on the ground that specimens occur 

 "with only a small spine-point on the hinder margin of the 

 third segment of the metasome." In the present specimen 

 it is very slightly upturned, so as to form an acute angle 

 (-^), which is probably a condition of immaturity. In 

 L. ceratinus it is completely rounded at all ages, while the 

 colour is a uniform yellowish white. 



Lysianassa ceraiina, Walker. 



For the synonymy see Trans. Linn. Soc, 2nd ser. vol. xii. 

 p. 327. 



A single adult male. 'J'his had the perseopods 1 and 2 

 and uropods 3 clothed with plumose setse, as in L. plumosa, 

 Boeck. It is probably a generic character in adult males. 



Corophium crassicorne, Bruz., and C. boneiii, M. -Edwards. 



On Aug. 10, 1913, Dr. W. A. Herdman, in a small motor- 

 launch from his steam-yacht ' Runa,' made a haul with a 

 very small and light dredge with cheese-cloth bag in the 

 south or " blind " entrance to Tobermory Harbour, depth at 



