26 THE NAUTILUS. 



by " Bwdnum" parvum H. C. Lea, 1841, may take the specific 

 name of C. milium. 



Columbella (Anachis) minima Arnold, 1903 ; not of Tenison 

 Woods, 1878, nor of Sacco, 1890, may be renamed arnoldi. 



Columbella (Anachis) guatemalensis Reeve, 1859, and tessellata 

 C. B. Adams, 1852 (not of Dunker, 1871) should be united 

 with C. lentiginosa of Hinds, 1844. 



Columbella gaskoini Carpenter, 1857, is identical with C. 

 (Anachis) taeniata Philippi, 1846. 



Anachis petravis Dall, 1908, proves to be identical with A. 

 subturrita Carpenter, 1866. 



Nitidella cribraria Lamarck, 1822, is preoccupied by Gmelin 

 under the name of ocellata, 1792. N. lavigata Linne, 1758, and 

 N. dichroa Sowerby, 1844, have been received by the Museum as 

 from Panama, which I believe to be an error. Both are known 

 to be Antillean. The latter is also N. elegans Dall, 1871, not 

 of Adams, 1850. 



Nitidella incerta Stearns, 1892, is probably to be referred to 

 the subgenus Alia. jV. cervinetta Carpenter, 1857, is identical 

 with N. baccata Gaskoin, 1851. 



Nitidella dalli E. A. Smith, 1880, is a synonym of N. gouldi 

 Carpenter, 1857 ; but not of Columbella gouldi Reeve, 1858. 



In 1870 I segregated from the heterogeneous species listed by 

 H. and A. Adams under the name of Astyris, 1853, a group of 

 three or four species to carry the name, of which A. rosacea 

 Gould, 1840, was later selected by Fischer as the type. C. 

 clausil'iformis Kiener, 1834, proposed as type by Try on, 1883, 

 belongs to the older genus Aesopus Gould, 1860, and cannot 

 serve as type of Astyris. 



The characteristic Californian group of bright-colored shells, 

 which have been by the writer and others carried under the 

 name of Astyris, should be included under the subgenus Alia, 

 H. and A. Adams, 1853. C. unifasciata Sowerby, from Peru 

 and Chile, is the type of Alia. 



C. gausapata Gould, may be considered a good species, which 

 ranges from Port Etches, Alaska, to San Diego, California. 

 Under carinata Hinds, 1844, may be included as varieties cali- 

 forniana Gaskoin, 1852, and hindsii Reeve, 1858. These forms 



