THE NAUTILUS. 27 



Band i, j 5 in. wide, Light chestnut with dark blotches. 



Band ii, Light edge to No. i. 



Band iii, §-, Black. 



Band iv, Light edge to hand iii. 



Band v, i 3 ^ in. wide, Yellow, gradually merging to black of base. 



Band vi, No. 6, Black to umbilicus. 



Greatest diameter of shell measured 1^ in. 



In size they vary greatly. The following are the extremes. 

 Largest. Smallest. 



Greatest Diam. H in- Greatest Diam. Its in. 



Smallest " 1| in. Smallest " | in. 



Altitude, i in. Altitude, f,, in. 



DREDGING OFF SAN PEDRO. 



BY H. N. LOWE. 



Last summer, while the late Mr. Edward W. Roper was living in 

 Long Beach, we (that is, Mr. Roper and myself) decided to do a little 

 dredging off' San Pedro. As there had been no extensive work done 

 in that line at San Pedro in late years, we were in hopes of being 

 rewarded with some rare shells and possibly some new species. 



Mr. Roper sent for his dredging outfit which he had previously 

 used at Eastport, Maine. We chartered the little sloop " North 

 Star" and made three dredging trips with moderate success. We 

 dredged in water from 5 to 20 fathoms depth, on muddy, sandy, 

 gravelly, once on a bottom composed of dead bivalves for the most 

 part, and two or three times among the rocks at 10 fathoms. 



I made one subsequent trip with Mrs. M. Burton Williamson with 

 the same boat and dredging outfit. We were greatly troubled in 

 dredging by a species of red algae, which covered the bottom so 

 thickly in places as to choke the mouth of the dredge, thus prevent- 

 ing the shells from entering. For the past two years, the ocean has 

 been full of this moss, and at times the beach has been covered with 

 it. From this algae in the dredge we obtained a few live specimens 

 of Calliostoma splendens Cpr. and C. gloriosimi Dall. 



Besides the shells, we dredged a number of curious crustaceans 

 and echinoderms not found on shore. 



