JR-43-78 
- 11 - 
June 27, 1978 
Bahia de Palmas, Gulf of California 
Los Barriles 
Baja California Sur 
Mexico 
large boulders scattered on sandy beach, Littorina 
penicillata on sunny side of rocks; Siphonaria with 
spiral egg masses on wave-splashed rocks-egg masses 
about 1" across (Kodachromes taken). 
23.39 N; 109.42 W 
JR-44-78 June 27, 1978 - 11:45 A.M. 
Bahia San Lucas 
Cabo San Lucas 
Baja California Sur 
Mexico 
on jetty near ferry landing and next to canning factory. 
4 species of Littorina on rocks and in cracks of rocks; 
L^. pullata in wetter situations 
22.53 N; 109.54 W 
JR-45-78 June 27, 1978 /:oo~2,-'Oo FM* 
Pacific Ocean, public beach between Cabo San Lucas 
and San Jose Del Cabo 
Baja California del Sur 
Mexico 
4 species of Littorina on rocks 
ca 22.53 N; 109.54 W 
JR-46-78 June 29, 1978 - 8:30 - 10:00 A.M. 
Bahia De La Paz 
Public Beach north of Pichilingue 
about 11 miles North of La Paz 
Baja California del Sur 
Mexico 
Littorina penicillata , Littorina sp., and various 
other mollusks from rocks on, under and in cracks) 
along rocky headland north of beach; many Nerita eggs. 
Few mangroves with few L. penicillata at base of trunk. 
Salinity 32-33% e 
24.15 N; 110.20 W 
