26 THE NAUTILUS. 



extreme low tide mark and the other two were dredged in 40 

 fathoms. 



Lamellaria stearnsi Ball. Two living specimens taken from 

 among Velutina cryptospira. 



Acmaea persona Esch. Acmaea pelta Esch. Acmaea patina 

 Esch. Abundant on rocks, the first being found in somewhat 

 more exposed positions than the other two. 



Acmaea instabilis Gld. Three living specimens were taken on 

 stems of holdfast kelp at extreme low water line. One dead 

 specimen also found, as well as a few fragments. 



Lepeta concentrica Midd. Dredged rarely. 



Molleria quadrae Dall. Two specimens dredged. 



Leptothyra carpenteri Pils. Rather common on rocks. 



Calliostoma costatum Mart. Calliostoma annulatum Mart. 

 Calliostoma variegatum Cpr. The first was common on rocks 

 near low water line, the second rather common from low water 

 mark down to 20 fathoms, and the third was much less plentiful 

 and taken only with the dredge in from 15-40 fathoms. 



Margarites pupillus Gld. Margarites helicinus Fabr. Marga- 

 rites succinctus Cpr. Margarites laevior Jeff. All rather common 

 about low water mark. Over 900 of the latter species were 

 taken from the craw of a surf duck (Oidemia perspidllata). 



Tegula pulligo Mart. Fairly common along extreme low tide 

 line. 



Solariella peramabilis Cpr. Abundant in from 15-50 fathoms. 

 Some specimens taken were very large, measuring over twenty 

 millimeters in height. 



Solariella cidaris A. Ad. Fairly common in from 30-50 

 fathoms. 



Solariella obscura Couth. Seven specimens dredged in about 

 50 fathoms. 



Halistylus pupoidet Dall. Three specimens dredged. 



Haliotis kamtchatkana Dall. Common at low water mark. 



Puncturella multistriata Dall. Puncturella cucullata Gld. 

 Puncturella galeata Gld. Puncturella cooperi Cpr. All four of 

 these species were dredged in from 15-50 fathoms. Culcullata 

 was also taken rarely at extreme low tide mark. Multistriata 

 and galeata were rather rare. 



