164 
PACIFIC SCIENCE, Vol. XVIII, April 1964 
TABLE 3 
Major Macrofaunal Associates of Bolbella califomica 
ORGANISMS BY 
PHYLOGENETIC GROUPS 
MEAN NUMBER/0.1 M 2 
(RANGE) 
PERCENT OCCURRENCE 
WITH Bolbella 
Polychaeta : 
Aricidia lopezi 
2.9 (0 - 16) 
61 
Chaetozone nr. spinosa 
13.6 (0 - 45) 
77 
Diopatra ornata 
1.0 (O' - .6) 
61 
Goniada lift or ea.. 
14.6 (1 - 35) 
100 
Haploscoloplos elongatus 
6.1 (0 - 34) 
54 
Lumhrineris spp.. 
5.3 (0 - 25) 
69 
Nephtys caecoides 
5.7 (0 - 13) 
84 
Prionospio malmgreni 
73.5 (0 - 350) 
92 
Prionospio pinnata 
4.6 (0 - 17) 
84 
Thalenessa spinosa......... 
0.8 (O' - 2) 
61 
Tbaryx spp. 
19.1 (0 - 185) 
54 
Am phi pod a : 
Paraphoxus epitomus 
4.5 (0 - 17) 
78 
Cumacea : 
Diastylopsis tenuis 
17.1 (0 - 144) 
72 
Mollusca: 
Olivella baetica 
4.6 (0 - 30) 
67 
Tellina buttoni. 
7.9 (0 - 60) 
72 
Nemertea: 
unidentified species 
9.2 (2 - 53) 
1 
100 
Specific determinations of the faunal com- 
ponents of the samples were made by the scien- 
tists of the Allan Hancock Foundation and 
the Beaudette Foundation mentioned in the ac- 
knowledgments and by the author (for Nema- 
toda and Mollusca). Sedimentary analyses were 
made by the geologists of the Offshore Research 
Project. 
ACKNOWLEDGMENTS 
The writer is indebted to the National Science 
Foundation (NSF Grant G-15369) and to 
the California State Water Pollution Control 
Board for support of this work, to the Allan 
Hancock Foundation for providing facilities, 
and to the many scientists and crew members 
who have served aboard the R/V "Velero IV.” 
Special thanks go to Dr. Olga Hartman, under 
whose direction the biological research was con- 
ducted, for identification of the polychaetes and 
for her critical reading of the manuscript; to 
Dr. Robert E. Stevenson and Dr. Richard Tibby, 
directors of the Offshore Research Project for 
supplying the physical data; to Dr. J. Laurens 
Barnard of the Institute of Marine BioResearch 
of the Beaudette Foundation, Santa Ynez, Cali- 
fornia, for identifying the amphipods; to Mr. 
Robert R. Given for identifying the cumaceans; 
and to Captain Fred C. Ziesenhenne for the 
identification of the echinoderms. 
REFERENCES 
Allgen, G A. 1951. Pacific freeliving marine 
nematodes, Part 5. Further notes on west 
American marine nematodes (Papers from 
Dr. Th. Mortensens Pacific Expedition 1914- 
16, LXXVI ) . Vid. Medd. Dansk naturhist. 
Foren. i K0benhaven 113:263-411, 57 figs. 
( Part 5, 366-411, figs. 47-57 ) . 
Cobb, N. A. 1920. One hundred new eemas. 
Contr. Sci. Nematology 9:217-343, figs. 1 — 
118. 
