294 University of California Publications in Zoology (Vou. 25 
All these are bottom dwellers, and almost without exception all 
returns for each were from depths of about 30 fathoms or more. Of 
the species taken at the regular series of stations, specimens of three 
only were found in shoaler water; Crago alaskensis elongata at one of 
eight stations, in 19 to 26 fathoms (D 5792); Paguristes turgidus 
at one of three stations, in 13 to 14 fathoms (D 5806) ; and Pagurus 
ochotensis at two of eight stations, corresponding one with each of the 
preceding. On the other hand, all but two, Crago alba and Pylopa- 
gurus ninimus, each of which was taken but once in 33 to 35 fathoms 
at the same station (D 5790), ranged into 40 or more fathoms of 
water. Seven, Pandalus jordani, Crago alaskensis elongata, C. com- 
munis, C. resima, C. spinosissima, Paguristes turgidus and Pinnixa 
occidentalis, were even taken in 60 to 68 fathoms in the deepest haul 
made (D 5788). Of these the first and second were also found at 
each of the other six outside stations lying beyond the 30 fathom line, 
the second, in addition, as mentioned above, being also obtained from 
one station inside that line; the third and fourth species were only 
taken at the deepest station, and the fifth only at the deepest station 
and one other; the last two were taken at three stations each. The 
only species recorded from more than one outside station and not 
taken at the deepest is Pagurus ochotensis. 
In nearly every case the bottom was composed of fine, more or 
less greenish sand, which at one station (D 5791) was marked by 
9? 
‘‘refuse and garbage’’ and at only one other (D 5790) replaced by 
a ‘‘very coarse variegated sand, with a small proportion of fine sand.’’ 
At this last, of the six species recorded from it, Pandalus jordani, 
Crago alaskensis elongata, C. alba, Pagurus ochotensis, Pylopagurus 
minimus and Paguristes bakeri, two, the third and fifth, were not 
found elsewhere. 
So far as shown by the hydrographic observations made outside, 
none of the outside species was obtained from water having a salinity 
less than 33.9 (bottom reading, D 5790) ; the highest salinity recorded 
was 34.3 (bottom, D 5789). The corresponding (bottom) tempera- 
tures ranged from 9.3° (D 5788) to 11.1° C (D 5806). 
Owing to the lack of any very definite data regarding their 
occurrence Acantholithodes hispidus, Randallia ornata, and Oregonia 
gracilis are not included in the above discussion. 
2. Of the twenty-three (50%) species taken only in the bay, seven 
are represented only in the shore collections, and for reasons already 
given will here be considered apart. Two of these seven are 
