302 CRUISE OF THE BARRERA 



limestone. The inner harbor covers two drowned 

 valleys leaving exposed a ridge between them, now 

 represented in part by an island upon which is an 

 old fortress (Reina Amalia) a survival of the era 

 of round cannon-balls. On the western side of the 

 harbor entrance is a rather steep elevation of about 

 two hundred feet — the remnant of a once much 

 higher coastal ridge. It is densely covered by 

 scrub growth and surmounted by a lighthouse. ] 



Being favored by a very low tide we were enabled 

 to examine carefully the entrance shore line, to 

 explore many tide pools and the inner portions 

 of the reef. Our fine catch compensated us for 

 our morning's failures. This proved to be one of 

 our very best littoral stations for marine inver- 

 tebrates. A few dredge casts were made in the 

 channel with fair success. An attempt to explore 

 the woods was frustrated by the incredible num- 

 ber of mosquitoes. A small Chondropoma of the 

 coastal belt type was discovered, although all our 

 specimens were occupied by hermits. Clapp and 

 the Patron, however, succeeded in getting many 

 Cerion mumia. 



A still moonlight night of rare charm followed 

 the close of day, but our pleasure was sadly marred 



