Confused about example of creating a formal grammar - grammar

Question

I'm reading Dick Grune's Parsing Techniques - A Practical Guide and I'm stuck on an example of what a formal grammar is (starting page 22). He starts with this:
0. Name may be replaced by “tom”
Name may be replaced by “dick”
Name may be replaced by “harry”
1. Sentence may be replaced by Name
2. Sentence may be replaced by Sentence, Name
3. “, Name” at the end of a Sentence must be replaced by “and Name”
before Name is replaced by any of its replacements
4. a sentence is finished only when it no longer contains non-terminals
5. we start our replacement procedure with Sentence
Then he re-writes this more formally as follows:
0. Name -> tom
Name -> dick
Name -> harry
1. Sentence -> Name
Sentence -> List End
2. List -> Name
List -> List , Name
3. , Name End -> and Name
4. the start symbol is Sentence
The re-write above (figure 2.2 in the book) introduces "List". I assume List is a non-terminal, but I can't figure out where it comes from or what it means.
Also, unless I mis-read the text, figure 2.2 is supposed to be the same as the first figure, but they don't exactly match. For example, where is rule #2 from the first figure ("Sentence may be replaced by Sentence, Name") in fig. 2.2?

Answer 1

You didn't copy the table properly.
2 must be:
List -> Name
List -> List , Name
List can either be a single name or a list, a comma and a name.
e.g. "dick , tom and harry" is a valid sentence because we construct it the following way:
Sentence (Replace Sentence)
List End (List will be replaced with "List , Name")
List , Name End (Replace List with "List , Name" again)
List , Name , Name End (Now replace List with Name)
Name , Name , Name End (Replace ", Name End" with "and Name")
Name , Name and Name (Replace the Names)
dick , tom and harry
I hope this will answer your second question as well.