132 AMERICAN JOURNAL 



The above species has been generally known as T. Byroni- 

 anus, Gray. We agree, however, with Mr. Adams, that the 

 latter should be referred to the west coast of America. The 

 figure in Ind. Test, does not agree with the Hawaiian species, 

 nor any of its Polynesian allies. Sandwichensis is (so far as 

 I am aware) confined to the Hawaiian Islands and first described 

 as above. 



We have received specimens of metallica, Rve., from Mr. 

 Cuming, sent to him from the Sandwich Islands, which do not 

 differ from the type, excepting in color. 



The figure in Voy. Bonite does not fairly represent the 

 species, that by Mr. Kiener is more faithful. 



Hydatina Guamensis, Quoy. 



1824. Bullosa Guamensis, Quoy, Voy. de L'Uranie, p. 423. 

 " " Feriissacci, " " " " pi. 6Q, fig. 



10, 12. 

 1857. Bulla scripta, Garr., Proc. Cal. Acad. p. 103. 



Doriprismatica imperialis, Pse. 



1860. Doris prismatica, var. imperialis, Pse., Proc. Zool. Soc. 

 p. 32. 



Doriprismatica lineata, Pse. 



1860. Boris prismatica var. lineata, Pse., Proc. Zool. Soc. p. 32. 



A typographical error to be corrected in the generic name of 

 the above two species. 



The names of the following species of Nudibranchia, described 

 in Proc. Zool. Soc. London, 1860, were preoccupied by Dr. 

 Kelaart, and have been changed as follows : 



Boris excavata, Pse., to oreosoma, Pse. 



" papillosa, Pse., to tincta, Pse. 

 Pleurobmnclms reticulatus, Pse., to violaceus, Pse. 



