1921] Schmitt: The Marine Decapod Crustacea of California 131 
Biological Survey of San Francisco Bay.—Pagurus ochotensis is 
the most abundant and widely distributed of the hermit crabs oceur- 
ring outside of the bay. It was taken at eight (D 5785-5787, 5789- 
0792, 5806) of the seventeen outside stations. These represent eight 
of the nine outside stations which were made seaward of the San Fran- 
cisco bar, that is to say, all stations outside the bar at which the depth 
did not exceed 46 fathoms. At the station of least depth, D 5806, 13 
Fig. 84. Pagurus ochotensis, natural size (after Benedict, U. S. N. M.). 
to 14 fathoms, only two specimens were obtained; at the other stations, 
which were made in 19 or more fathoms, from eight to forty specimens 
were taken. The bottom, except at D 5790 and D 5791, was ‘‘very fine 
green sand’’ (‘‘grey’’ at D 5806); at D 5790 it was rather ‘‘very 
coarse variegated sand with small proportion of fine sand,’’ while at 
D 5791 very little bottom material other than ‘‘refuse and garbage’’ 
was indicated. Except as noted above (D 5806), D 5791 with its 
‘‘refuse and garbage’’ bottom returned the least number of specimens, 
viz., eight, thirteen in one case and twenty or more in each of the 
