114 AMERICAN JOURNAL 



water mark. I have handled or examined, first and last, a bushel 

 or two of this species, which is extensively used for " shell work." 

 I have not seen specimens from north of San Francisco, and 

 Monterey is its headquarters. I have been rather lengthy in 

 describing the differences between this and A. corrugate?, not on 

 account of any very close resemblance between normal speci- 

 mens, but because they have been so widely confounded. Oc- 

 casionally, at Monterey, a stunted, beach worn specimen of A. 

 corrugata turns up, which, at first sight, much resembles a very 

 large specimen of the versicolor, but I never saw any perfect 

 specimens which were not instantly distinguishable. The normal 

 specimens of corrugata, at Monterey, though smaller and brighter 

 colored than the northern ones, aie quite as distinct. The home 

 of A. corrugata is from Sitka to Neah Bay, where the other 

 species is never found. Monterey is the most southern range of 

 the former, and I have specimens from Kadiak. It occasionally 

 reaches a very large size, and the var. stylina, Cpr., is abnor- 

 mally slender and elongated. The smallest specimens I have 

 seen are larger than the largest A. versicolor. 



The " Amycla" undata, of Carpenter, is an acuminated shell 

 with shoulder whorls, strong ribs and short, hardly twisted canal, 

 without the post-labial pinch of Amphissa. It is very different 

 from the previously mentioned species, and comes from Catalina 

 Island in deep water. 



Genus ASTYRIS, H. & A. Ad. 



Alia, part, H. & A. Adams, i, p. 183, 



Columbella and Amycla, sp., Cpr. 



Columbella, Gld., Auct. 



Astyris, Dall, Proc. B. Soc. Nat. Hist. Mar., 1870, p. 242. 



ASTYRIS CARINATA, Hinds. 



Columbella carinata, Hinds., Zool. Sulph. Voy. p. 39, pi. x, f. 

 15, 16, 1844. 



Columbella gausapata, Gld., Proc. Bost. Soc. Nat. Hist, iii, 

 p. 169, Jan., 1850. Otia, Conch, p. 71. 



Alia gausapata, Gld., Otia Conch, p. 245, 1862. 



Columbella Californiana, Gaskoin, P. Z. S. 1851, p. 12. 



Columbella Ilindsii, Rve. 



Amycla gausapata, Cpr., Suppl. Rep. p. 662, 1863. 



Amycla? Californiana, Cpr., 1. c. 



The name Alia, of Adams, precedes Astyris in their work, 

 but no type being named, and this species not agreeing with the 

 generic diagnosis of Alia, we are at liberty to accept the genus 

 Astyris, with which Alia is in great part synonymous. 



