AMPHIPODA AND ISOPODA OF THE FIRTH OF CLYDE. 87 



DYNAMENE VIRIDIS, Leach. 



Dynamene viridis, Milne Edwards, Crust., iii., p. 344. 



Cymodocea viridis, Milne Edwards, Crust., iii., p. 216. 



Habitat. — Taken between tide-mark, Portloy, Cum- 

 brae, in a small hole in one of the loose boulders. 

 There were six in the hole, all females, and all in 

 ova, some in a more advanced stage than others. 

 Some of the young were well formed, and could 

 move about slowly, but the parents showed little 

 aptitude for walking. In the mouth of the hole 

 there was a stout Ncesa bidentata-, but whether this 

 was the male occupant guarding his harem, or an 

 intruder on the privacy of the fair sex, I am not 

 prepared to say. If we incline to the belief that 

 lie was guarding his own, this view would to some 

 extent be corroborated by another couple found 

 close together in a crevice on the same boulder. In 

 this case the Na?sa bidentata was much smaller than 

 his brother above alluded to. The fact of his having 

 only one female companion might be due to his 

 youth : but as time advanced he might add more to 

 the number, as he found himself in a better position 

 to protect and support them. On the other hand, as 

 he has been seen with Dynamene Montagui, he may 

 be a rover, and not too particular as to the com- 

 panions with whom he may associate. Taken at 

 Lahinch, Co. Clare, Ireland, by Mr. W. Thompson. 



Genus Cymodocea, Leach. 

 cymodocea truncata, Montagu. 



Oniscns tvnncatus, Montagu, MSS. in Brit. Mus. 



Cymodocea truncata, Leach, Edin. Enc, vii., p. 433. 



Habitat. — Dredged by the Rev. Canon Norman in 

 Lamlash Bay, Isle of Arran ; Devonshire coast, Mon- 

 tagu and Leach ; Belfast Bay, W. Thompson ; St. 

 Andrews, Dr. Macintosh. 



CYMODOCEA EMARGINATA, Leach. 



Cymodocea emarginata, Leach, Diet. Sci. Nat., xii., 

 p. 433. 



