OF CONCHOLOGY. 131 



ing to it that of its illustrious author. It may be recognized 

 by its leaden colored aperture and the fine black lines with 

 which it is distinctly marked obliquely. 



Neritina chrysocolla, Gld. 



1847. Proc. Boston Soc. p. 237. 



1852. Report Ann. Ex. Ex. p. 158, fig. 188. 



1855. N. navigatoria, Rve., Con. Icon. sp. 102. 



Both of the above are credited to the Sanioas. We have re- 

 ceived it from the Ralick Islands, where it differs only in being 

 of a darker color. 



Royssi and cuprina, from Islands further south, connected with 

 the above species by M. Recluz,, we hold to be distinct. 



Leptonyx rubricincta, Migh. 



1845. Turbo rubricincta, Migh., Proc. Boston Soc. p. 22. 

 1845. Trochus verruca, Gld., " " " p. 27. 



The above synonymy we have determined from typical speci- 

 mens received from Dr. Gould. Although the descriptions 

 were read at the same meeting of the Society, Dr. Mighel's 

 name has precedence a few minutes at least, having been printed 

 five pages previously. 



? Trochus tantillus, Gld. 



1849. Proc. Bost. Soc. p. 118. 



1852. Report Am. Ex. Ex. p. 184, fig. 215. 



1851. Margarita angulata, A. Ad., Proc. Zool. Soc. p. 190. 

 1861. Trochus diminutivum, Rve., Con. Icon. sp. 57. 



This species varies widely in shape and sculpture. The um- 

 bilicus seldom remains open to mature age. Specimens occur of 

 larger size and more elevated than as yet described. It proba- 

 bly belongs to Littorinidse, being found in crevices of rocks at 

 high water mark and above. 



Clanculus atropurpureus, Gld. 



1849. Trochus atropurpureus, Gld., Proc. Bost. Soc. p. 107. 



1852. " " " Am. Ex. Ex. p. 189, fig. 224. 



1851. Clanculus nodiliratus, A. Ad., Proc. Zool. Soc. p. 163. 



POLYDONTA SaNDWTCHENSIS, Soul. 



1852. Trochus Sandwichensis, Soul., Voy. Bonite, p. 595, pi. 



37, fig. 23, 24. 

 1861. Trochus metallieus, Rve., Con. Icon. sp. 94. 



" intextus, Kien., Coq. Viv. pi. 37, fig. 2. 



