CAPE SAN ANTONIO 155 



a reef-formed limestone, and there they began a 

 search for land-shells. 



Barring one or two species of Urocoptids taken 

 by Charles Wright some fifty years ago at La 

 Jaula, in the extreme eastern end of the peninsula, 

 there are no records of land-shells from this entire 

 region. It is, indeed, a terra incognita to the 

 naturalist. As it differs in all physical characters 

 from the sierra, or the pine loma region, it was 

 reasonable to suppose that some discoveries of 

 interest might result from our visit. This country 

 is of a type that corresponds closely to the flat 

 slightly elevated coastal strip found south of the 

 Cienega de Zapatos and also in the south half of 

 the Isle of Pines. Its forest character is quite the 

 same and all the physical conditions of life are 

 wholly similar. We believed that its fauna would 

 prove to be generically similar but specifically 

 distinct, at least among the land-shells, and such 

 proved to be the case to a very large extent. 



The shore party was obliged to combat clouds 

 of mosquitoes that never ceased their ravenous 

 attack from the moment they entered the woods. 

 Continuing some three miles farther, collecting 

 along the way, Clapp and Simpson abandoned the 



