21 
In the course of our five weeks in Quintana Roo waters, 117 collecting 
stations were established, mostly in the marine littoral, and some 14 
plankton samples taken with tov-and-dipnet, the latter with aid of a 
submerged electric light over the ship's side. Dr. Clarke at 20 different 
localities collected insects along with other terrestrial arthropods and 
molluske , and on Cozumel, in addition, a number of bats. 
The number of marine invertebrates obtained may well total 10,000. 
Many of these are email, or even of microscopic size. Over 500 specimens 
of fish were caught, and something in excess of 5? 000 insects and terres- 
trial arthropods were also brought back. Scientifically this Yucatan 
expedition may be counted as one of the more productive of the recent 
Bredin Caribbean expeditions. 
THE W EATER 
Although the rainy season, with 50 to 60 Inches of rain, runs from 
December to early May, and occasionally to mid-April, fine clear weather 
proved the rule with us this year. The rains we did have seemed few and 
far between, but those that we experienced were proverbial tropical down- 
pours, cloudbursts I want to say, for one got thoroughly soaked and chilled 
f 
in them. Most of the time there were strong persistent winds, 70 per cent 
of the time from the N» E. the sailing directions tell us, about half the 
time 10 to 12 miles an hour. A quarter of the time the winds ranged up to 
20 or more miles an hour, but now and then a fierce squall would burst in 
suddenly from the north or west with winds up to 40 or more miles an hour 
— our "bonanza" for example. We found the days quite warm, in the low 
X 
