4 
notably Nerita peloronta a nd tessellata and versicolor , Litorina tessellata a 
Tectarius nodulesa (?) is abundant on tree trunks along with Perl on , 
T ectarius rauricata also abundant same station as last, but not so high on 
trees. Her! tine, pupa (very dark form) in patches on rocks * Pissurella 
barbadensis and several Acniaea are fairly abundant about high tide 
mark also the large Phi ton • A number of marine species, 
Columbellas, ^erithis , Conus , etc*, are found sparingly in cavities of 
rock below high tide* 
Dredging off this sho re is rendered impossible by the corals. 
Many very desirable marine species are brought up in a more or less 
broken condition by hermit crabs, showing their probable presence not 
far off if a dredge could only be used* 
Tide pools farther down the bay showed up in some quantity, Livona 
pica t Leuco zonal s leuco zonais , Conus nus , Purpura pa tula , Nerj tina pupa. 
typical in color, Li torina mespilum (in great quantities) , Mytilus d omin - 
gainsis , Coluntbella mercatoria , Li torina tessellata * 
At Perdices 7 miles S* from Rosario no land shells were found alive,- 
except Perl on ios tom a * The very few dead shells taken were of the same 
species as found here, Beginning at about Perdices the shore is more 
bold, the elevation of 10 to 15 feet, found here only a distance back 
then comes to tne shore, forming a cliff theoretically, but in effect so 
much eaten into by the sea it presents much the same appearance as here: 
