BY C. HEDLEY. 299 



York series, differ by having a higher spire, finer shoulder- 

 wrinkles, and the operculum of Natica, i.e., spirally sulcate. 

 Again, another form which I need not discuss, appears under this 

 name from Demerara and Mazatlan. Specimens obtained at 

 Aden by Major Yerbury agree with the Cape York shells. 



With the Cape York shells, there also agrees a set of three, 

 labelled " Gualteriana, Pet., from Isle of Bohol, M.C." Though 

 these are not marked types, I have some confidence in regarding 

 them as the originals of Reeve's figure, and of the second descrip- 

 tion of Recluz, which differs in minor details from the first. 

 Even the error of Cuming's clerk, in misquoting the editor for the 

 author of the species, supports their authenticity. 



Granting this, "maroccana" or "marochiensis" may be reserved, 

 as the name implies, for an African species; while the Australian 

 shell thus miscalled by Angas, Brazier, and Shirley should be 

 referred to gualteriana. Misquoting the species as of Petit, Mel- 

 vill and Standen have noticed N. gualteriana from Boydong Cays, 

 near Cape York. I have catalogued it from Mast Head Island. 



Philippi's account of Natica avellana suggests to me that it is 

 closely related to N. gualteriana* 



Natica vitellus Linne. 



Nerita vitellus Linne, Syst. Nat. x., 1758, p. 776, for Rumphius, 

 PI. xxii., fig. D, fide Hanley, Ips. Linn. Conch., 1855, p. 394. 



Nerita rufa Born, Index Caes. Vind., 1778, p. 413; Id., Test. 

 Mus. Caes. Vinci., 1780, p. 398, PI. 17, figs. 3, 4; Id., Brauer, Sitz. 

 Akad. Wiss., lxxvii., 1878, p. 70. 



Nerita fasciata Martyn, Univ. Conch., iii., 1786, PL 110, right 



ng. 



Not Natica vitellus, of Lamarck and of authors generally, which 

 is Nerita stellatus Martyn, Univ. Conch., hi., 1786, PI. 110, left 

 fig. ; Id., von Martens, Mai. Blatt., xix., 1872, p. 45. 



Hanley shows that the Nerita vitellus of Linne is not the Natica 

 vitellus of other writers, but is the Nerita rufa of Born. The shell 

 universally but erroneously called Natica vitellus must now take 



Phillipi, Conch. Cab., ii.,(l) 1852, PI. xi., fig. 14. 



