a. They have the genitive plural in -ium (but some monosyllables lack it entirely). For a few exceptions, see § 78.
b. All neuters have the nominative and accusative plural in -ia.
c. The accusative plural (M. or F.) is regularly -ís.
d. The accusative singular (M. or F.) of a few ends in -im (§ 75).
e. The ablative singular of all neuters, and of many masculines and feminines, ends in -í (see § 76).