Here near the beginning of the long genealogical listing in Ether 1, the 1830 edition dropped the conjunctive and that is consistently found everywhere else in the listing (at the beginning of verses 8 through 32). This and at the beginning of verse 7 does not actually begin the listing but is the second one after the initial reference to Ether in verse 6 (“and he was a descendant of Coriantor”). Thus the loss of the and at the beginning of verse 7 created a clear inconsistency in the listing. The critical text will restore the original and, just as it was restored in the 1908 RLDS edition (by reference to 𝓟).
Summary: Restore the original connective and at the beginning of verse 7 in the genealogical listing found in Ether 1; all other examples in the listing have this connective and.