34 BRITISH TUNICATA. 



ENGLAND. - - Sealiam Harbour, Durham (Hodge). 

 Scilly Isles (Cams). 



WALES. Menai Straits, Anglesey (fiowerbank). 



IRELAND. Strangford Loch, Down, dredged [1839] 

 (Thompson). " Dr. Scouler has met with it on the 

 Irish Coast" (Thompson, ' Nat. Hist. Irel.'). 



CHANNEL ISLANDS. Guernsey, and Gouliot Caves, 

 Sark (Norman). 



First record.- -Thompson, 1848. 



M. Sars records this species as common on the 

 Norwegian Coast. 



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FIG. 103. Part of a colony of Didemnum gelatinosum, enlarged. 

 a, common tegumentary tissue ; b, an individual immersed in the 

 tissue ; p', an egg only a little developed ; p", an egg more 

 developed. (M. Edwards, pi. vii, f. 5a.) 



The following are notices of other species of 

 Didemnum :- 



Mr. William Thompson (' Nat. Hist. Ireland ') says : 

 " A species apparently of this genus may not uncom- 

 monly be found investing the stems of Halidrys 

 siliquosa. It is of a pale-gray colour, and may be said 

 to give the plant the appearance of being besmeared 

 with bird-lime." 



