1915] FRYE, RIGG, AND CRANDALL—KELPS 475 
from Peru. In regard to the size of the first species he quotes (p. 64) 
a field note of the collector (Dr. RoBERT CoKER) as follows: ‘‘The 
largest piece measured 10 m. and the entire single cluster weighed 
30 lbs.” He refers to the second species (p. 61) as ‘‘the short plant 
(2-3 m. long) that grows gregariously on surf-swept rocks with 
densely intertangled rhizomatous holdfasts.... . Burp (2) 
found Macrocystis plants varying in weight from 27 to 300 pounds. 
The largest specimen reported from the Puget Sound region is 
40 feet in length (Ricc 12). 
This species was not found growing in the territory covered 
by the western Alaskan expedition, but beds of it were found by 
the southeastern expedition. The deepest water in which it was 
found growing was 12.5m. Where the plants were growing in 
water of this depth, the longest portion of an attached plant floating 
at the surface was 13.8m. If this plant rose from the bottom 
at an angle of 45°, the under-water portion would be 17.3 m. long, 
and the whole would be 31.1m. It seems likely that it rarely if 
ever reaches a length of 38 m. in Alaska. 
The longest Macrocystis plant found on the Californian coast 
measured 45.7m. Many are only 9-13m.long. This species with 
a definite holdfast has been found by the, writers growing in water 
varying in depth from 23 to 14 fathoms. When it grows in shal- 
lower depths the holdfast is more like a rhizome. A single speci- 
men of this plant has been found on the Californian coast that 
weighed 136kg. Aspecimen collected at Santa Barbara, California, 
was 23 m. in length and weighed 22 kg. Another one collected at 
the same place was 25m. long and weighed 37kg. The deepest 
sounding made in a Macrocystis bed was 14 fathoms. This was on 
the Californian coast. The deepest sounding made in Alaska was 
7 fathoms. 
Pelagophycus 
Pelagophycus porra has been found 45m. in length on the 
Californian coast (fig. 1). It has not been found in the Puget 
Sound region or in Alaska. The deepest sounding made in Pelago- 
phycus beds was 20 fathoms. Burp (2) found that these plants 
varied in weight from 16 to 71 pounds. 
