10 University of California Publications in Zoology [Vou. 23 
Spirontocaris franciscana, Crago lomae, Pachycheles holosericus, Pet- 
rolisthes rathbunae, Paguristes ulreyt, Dardanus jordam, Pylopagurus 
holmesi, and Homola faxont. 
The forty-seven species taken in the course of the biological survey 
of San Francisco Bay are, following the systematic treatment of each, 
more or less fully discussed from the point of view of their distribution 
and habitat within the region covered by the survey. With the 
exception of five obtained only at shore stations, Upogebia pugettensis, 
Emerita analoga, Oedignathus inermis, Petrolisthes cinctipes, and 
Pachygrapsus crassipes, and three from miscellaneous collections, 
Acantholithodes hispidus, Randallia ornata, and Oregona gracilis, 
these forty-seven species were taken at 133 (89%) of the 150 dredging 
stations, and 152 (50%) of the 305 hydrographic stations at which 
collecting apparatus was employed. These stations are distributed 
as follows: 
Regions of Number of stations at which Number of stations at which 
the bay collecting apparatus decapods were 
(for limitations was employed taken 
see p. 323) 
Dredging Hydrographic Dredging Hydrographic 
(Wp petug sseeeeceee ee 22 80 22 37 
Mad dete ee We 109 66 43 
WOWeTS eee 38 107 28 72 
Outside il7/ 9 iy 
Totaly 150 305 ie}3} 152 
A summarized discussion of the distribution of the bay fauna 
together with a few remarks on the geographical distribution of the 
California decapods in general concludes this paper. These remarks 
are confined to littoral records only, for aside from the fact that the 
deep sea fauna, as a rule, is more or less cosmopolitan in its distri- 
bution our knowledge of that occurring off California is too incom- 
plete at the present time to permit of more than a mere listing, which 
is included in appendix J. Beside this distributional list of all the 
California deeapods, found in appendix I, there are two other appen- 
dices, which, however, deal only with the survey data. All extensions 
of range recorded are based on material contained in the collections 
of the U.S. National Museum. After figures indicative of salinity the 
expression per mille (9/99) is to be understood. 
With the exception of those designated U.S.N.M., obtained through 
the courtesy of the U. 8S. National Museum, the line drawings, both 
copies of figures already published as well as the several original 
