ERRATA. 



History, &c, p. 36, 1. 9, for "Tetracres," read « Tetraceres." 

 p. 49, 1. 20, for " 13," read " 14." 

 p. 51, 1. 8, for "46," read "45." 

 Fam. 1, PL 1, Gen. Doris, p. 8, 1. 5, for " brancho-cardiac," read " branchio-cardiac." 



p. 12, 1. 2, for "a shell closely investing," mzc? "a shell is then perceived closely 

 investing. 

 PI. 17, Gen. Goniodoris, p. 3, 1. 30, for "larger," read "large." 



Gen. Idalia, p. 2, 1. 15, for "fig. 5a," read "PL 17, fig. 5a." 



p. 2, 1. 28, /or "anterior surface," read "anterior portion." 

 PL 21, for "iEgires," read "iEgirus." 

 Fam. 3, PL 2, Gen. Dendronotus, p. 1, 1. 3, for "altus," read "altius." 



p. 2, 1. 30, for "lies above the ovarium and not below," read "lies below the 

 ovarium and not above." 

 PL 3, Dendronotus arborescens, p. 1, 1. 12, "Fide Gould," should be on the line above. 

 PL 4, Gen. Doto, p. 2, last line, for "digestive," read "vascular." 



p. 4, 1. 19, Generative Organs. Add—" a, male intromittent organ partially exserted ; b, 

 female orifice ; c, testacle ; d, ovary ; e, oviduct ; /, dilated portion of the same ; 

 g, g, mucus-gland ; h, spermatheca." 

 PL 7, 8, Gen. Eolis, p. 3, 1. 16, for "epitomy," read "epitome." 

 p. 6, 1. 32, dele "and sides of the back." 

 p. 7, 1. 3, for "fig. 3b," read "fig. 31." 



p. 9, 1. 13, for " skin on the side of the back," read " skin on the foot." 

 PL 12, Eolis coronata, p. 2, 1. 25, for "Whitby," read "Whitley." 

 PL 38a, Gen. Fiona, p. 2, 1. 17, for "9," read "7." 



p. 2, 1. 29, for "4, 6," read "4b." 

 p. 3, 1. 9, for "(l)" read «(i)." 

 p. 4, 1. 9, for "2a," read "2c." 

 Appendix, p. xiv, 1. 6, for "Acanthobranchiata," read "Anthrobranchiata." 

 p. xv, 1. 13, for " Bornellia," read "Bornella." 

 p. xvi, 1. 19, for "Acanthobranchiata," read "Anthrobranchiata." 



