442 Canon A. M. Norman on British Isopoda. 



I80I. Idotea entomon, Dalj'ell (uec Linn^), Powers of tbe Creator, &c. 



vol. ii. ])1. Ixiii. (ig. 9. 

 ISU". Idothea granulosa, G. 0. Sars, /. c. p. 82, pi. xxxiv. fig. 1. 



This form, liitherto confused with the last, has been found 

 by me at Hartley, Nortluiniberland, and occurred among 

 some Crustacea taken at Berehaven, Ireland, and sent to me 

 by Professor H addon for identification. 



3. Idotea neglecta, G. 0. Sars. 



]80o. Idotea mariyia, Dollfiis, I. c. p. 7, fig. 22. 



1897. Idothea ncglecta, G. 0. Sars, I. c. p. 84, pi. xxxv. fig. I. 



I have for many years doubted whether this should be 

 regarded as a variety of I. halthica or a distinct species. The 

 following circumstance has satisfied me that Sars is right 

 in separating it : — /. halthica and the present form occur at 

 times in great profusion at Plymouth. At my request the 

 Director of the Marine Laboratory sent me a large bottle full 

 of sj ecimens ; there were many hundred specimens of each 

 form (/. halthica and /. neglecta) of all ages, and I was able 

 to separate the specimens of all ages without hesitation as to 

 a single example. I also have specimens from Slietland and 

 Falnioutl), and found it in four localities on the Norwegian 

 coast, ranging from Bergen Fiord to Vadso, Fin mark. 

 l)r. Thomas Scott has just recorded its occurrence in the 

 Moray Firth (' Twenty-second Report Fishery Board for 

 Scotland,' 1904, p. 257). 



4. Idotea viridis, Slabber. 



1778. Oniscus viridis, Slabber, Naturk. Terlistigengen, p. 104, pi. xii. 



figs. 4, 0. 

 18&9. Idotea phosjyhorea, Hoek (nee Harger), Crustacea Neerlandica, 



ii. (Tijds. Ned. Dierk. Ver. (2) Deel ii.) 1889, p. 7, pi. vii. figs. 2 



&2r. 

 1895, Idotea salinarum, Dollfus, /. c. p. 7, fig. 21. 

 1897. Idothea viridis, G. O, Sars, I. c. p. 83, pi. xxxiv. fig. 2. 



This elongated and narrow species is essentially an inhabi- 

 tant of blackish water. My finest specimens are from Alde- 

 burgh, Suflfolk, and I have received it from Mr. W. Bateson, 

 ■who took it at Soutiiwold on the same coast. I have also 

 found it in Arnold's Pond, Guernsey, and in the Fleet at 

 "Weymouth. 



5. Idotea pelagica, Leach. 



1867. Idotea pelagica, Bate & Westwood, I. c. vol. ii. p. 384. 

 189.5. Idofea pelcif/ica, A. Dollfus, /. c. p. 8, fig. 2.3. 

 1897. Idothea pelofjica, G. O. Sars, /. c. p. 81, pi. xxxiii. 



