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ERRATA AND CORRIGENDA. 



Vol. I, page 8, line 12, for Clavellina read Clavelina. 

 17, lines 14 and 15, for Clavellina read Clavelina. 

 ,, 76, 1, 3, and 10, for monarchus read monachus. 

 146, line 10 from bottom, for monarchus read monachus. 



last line, /or Solitaria 64 read Solitarise 63. 

 II 9, line 7, for Plate I read Plate XXI. 

 ,, 10 from bottom, for Pergestina read Tergestina. 

 ., 10, lines 13 and 14 from bottom, should be transferred to Vol. 



I, p. 122, Dicquemare's Sacanimal being Ciona caitina, 



the Ascidia canina of this monograph. 

 14, 8, for Plate I read Plate XXI. 

 15, 10, II XXII. 

 28, 17, /or fig. 8 read &g. 9. 

 73, 18, for Plate XXVIII read Plate XXIX. 

 ,, 115, 3 from bottom, and p. 116, 1. 4, for sulcata read 



sulcatula. 

 138, Thylaciumvariolositm is again described, as Distoma vario- 



losum, in Vol. Ill, p. 40. See remarks at bottom of p. 42. 



For other alterations required in generic names see pp. 



103-104. 

 ,, 160, Diazona hebridica should have been described as Diazona 



violacea. See foot-note on that page and also on p. 100 



of the present volume. 



