TABLE 5

Relative abundances (%) of snail species within micro-habitats in Laguna Mojarral East (sampling during 4/20-4/30/80)

Species	Soft sediment (1)	Nymphaea (2)	Chara (3)	Travertine (4)
Mexipyrgus churinceanus Taylor 1966a	0.99	0.03	na	na
Mexithauma quadripaludium Taylor 1966a	0.01	0.06	0.11	0.76
Nymphophilus minckleyi Taylor 1966a	na	0.91	0.89	0.24
Total number of snails collected	3468	1219	251	498

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(1)From 56 10-minute trapping sessions
(2)From 10 samples of plant bunches
(3)From 5 samples of plant bunches
(4)From 110 pieces averaging 12.5 by 30.0 cm