- 10 - 
JR-39-78 June 24, 1978 - 7:00 P.M. 
Bahia De La Paz (east side) 
about 4 miles north of La Paz 
Baja California Sur 
Mexico 
Route Mex 11., on shore rocks just above water Littorina 
penicillata and Nerita 
24.10 N; 110.18 W 
JR-40-78 June 25, 1978 - 5:30 P. M. 
Bahia De La Paz (south side) 
about 8 miles west of La Paz 
El Centenario 
Baja California Sur 
Mexico 
Route Mex. 1, west of La Paz; pebble and sand conglomerate 
shore, low tide, dead shells only, no Littorina . 
ca 24.10 N; 110.18 W 
JR-41-78 June 26, 1978 /^.'OOA/ootJ — H3o p.M, 
Pacific Ocean 
Punto Lobos Beach, about 2.5 miles south of Todos Santos, 
beyond ,£a?&h of paved road Mex. 9. 
Baja California Sur 
Mexico 
Littorina modesta , pullata , penicillata , and aspera in 
crevices of rocky promontory at south end of beach 
ca 23.27 N; 110.13 W 
JR-42-78 June 26, 1978 
Pacific Ocean 
San Pedrito, ca 4.3 miles south of Todos Santos, beyond 
end of paved road, Mex. 9. 
Baja California Sur 
Mexico 
4 species of Littorinidae, as in JR-41-78, actively crawling 
in surf; rocky headland at south end of beaclt; nearly high 
tide-Salinity 34% 0 in open surf; 12%«in hypo saline lagoon 
behind beach 
ca 23.27 N; 110.13 W 
