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Most locality records contain only a textual description of place , which makes these data effectively unusable in spatial analyses . These small spiders build cribellate ladder or funnel webs . To cross the threshold of this modest mission stucco is to enter a parallel universe where tribal peoples , not fastidious Europeans , came to dominate America . How many cases and dollars of delinquent debt were submitted for each offset tool compared to the total delinquent debt an agency was attempting to collect ? This diatom subzone has an age range of 4.8 to 5.5 million years ago , so this is the age range during which Bering Strait first opened . People tend to categorize snakes as either venomous or harmless , but , as colubrids demonstrate , the reality is a continuum , from completely harmless , to mildly venomous , to deadly . The limits of this family of running or burrowing spiders are still unclear , and most African genera attributed to the Miturgidae may ultimately be moved elsewhere ( Griswold 1993 ) . Rana limnocharis sensu stricto is confined to Sumatra and Java ; Java also has an endemic limnocharis species ( Veich et al ., 2001 ) . This evaluation should include agency and governmentwide assessments of how actively , successfully , and cost effectively agencies are pursuing delinquent debt . These minute , usually armor plated spiders build modified glue-sticky silk orb webs . An experiment on a Helix aspersa weighing 1/4 oz showed it could drag vertically a weight of 2 1/2 oz ., or ten time its own weight . In conjunction with this research I have become interested in the methods by which molecular data is used to determine species boundaries . As an indication of how much body processes are slowed down , a hibernating pulmonate at 30oF will use as little as 1/50 th the amount of oxygen used by an active snail at 59oF . These minute spiders build highly modified glue-sticky silk orb webs . These are herbivores ( vegetarians ) and carnivores . Use of these data in publications , dissertations & theses , or other scientific reports , should be accompanied by an acknowledgement of the Department of Ornithology & Mammalogy , California Academy of Sciences , as the source for the information . Karl Schmidt of the Field Museum of Natural History in Chicago died after suffering a bite from an African boomslang in 1957 .