THE NAUTILUS. 



VOL. XXII. APRIL, 19O9. No. 12. 



SOME NOTES ON CYPR.EA OF THE PACIFIC COAST. 



BY WILLIAM HEALEY DALL. 



In 1906-07 Senor Don Joaquin Gonzales Hidalgo published in 

 the Memorias of the Real Academia de Ciencias, Madrid, a useful 

 review of a monographic character, without figures, on the genus 

 Cypraa, in which the author includes Trivia. 



In looking over the species of the west coast of America, and 

 referring to the above-mentioned paper, some questions were raised 

 in my mind, leading to the following notes being recorded. 



CYPR^EA EXANTHEMA L. and var. cervinetta Kiener. Both the 

 typical form and the variety are found on both sides of the Isthmus 

 of Panama, and no constant differences seem to exist between 

 Atlantic and Pacific specimens, when a sufficiently large series is 

 compared. 



CYPR^EA ROBERTSI Hidalgo, 1906. This name is proposed for 

 the well-known C. punctulata Gray, 1824; not of Gmelin 1791. 



CYPR^EA ANNETTE Dall, n. nom. The name C. soiverbyi ap- 

 plied by Kiener in 1845, to a well-known West American species, 

 is pre-occupied by Anton (1839) and Gray (1832). Kiener figured 

 a worn specimen under the name of C. ferruginosa, a name which 

 had also been used by Gmelin, 1791, for another species. Sowerby 

 in the Conchological Illustrations (1837) referred the C. sowerbyi 

 Kiener, to the C. zonata Lamarck, 1810; but the latter, though 

 allied, is distinct and comes from the African coast. I may note 

 that the C. zonata of Lamarck and Sowerby (after Chemnitz) had 



