254 



REPORT 1868. 



TuiaCATA. 



The only catalogues for comparison with the thirty-nine Shetland Tunicata 

 are Alder's list of those of the Northumberland and Durham coasts (Catalogue 

 of the Mollusca of the Northumberland and Durham Coasts, p. 101), which 

 includes thirty species, my own very short list of sixteen observed in the 

 Clyde district (" The Mollusca of the Firth of Clyde," Zoologist, 1857, p. 5703), 

 and a third of twenty-one Hebridean species by Mr. Alder (Brit. Assoc. 

 Report, 1866, p. 206). 



POLYZOA AND CoZLENTEBATA. 



I. Alder, " Catalogue of the Zoophytes of Northumberland and Durham," 



1857, and " Supplement " to the same, 1862. 

 K. Rev. T. Hincks, " Catalogue of the Zoophytes of South Devon and South 



Cornwall," 1861-62. 

 L. Norman, Brit. Assoc. Report, 1866, p. 199. 



ECHLNODEKMATA. 



