Praudhamanorama p218

p218

[On] "māsaśchandasi": The meaning of the statement is that the letter t replaces "mās" before an affix beginning with a bh-sound in the Veda. "mādbhiḥ śaradbhirdurodaraṃ tava" is the example.
[On] "hrasvo napuṃsake [prātipadikasya]" (Pāṇini 1.2.47): Here, by the mention of "hrasva" [short vowel], "acaḥ" [of a vowel] is present [by implication]. Because it specifies the nominal stem, the rule applies to that which ends in it; hence he says: "ajantasya" [of that which ends in a vowel]. But it was not explained as "the vowel of a nominal stem", because where syntactic agreement is possible, difference of syntactic agreement is improper, and because it would over-extend to [cases like] "suvāgbrāhmaṇakulam" and so on.
[On] "sannipāta...": The substitute y made on the basis of a non-a vowel would [otherwise] become the cause of its elision. And this is hinted at in the Mahābhāṣya on the sūtra "eoṅ" and on the sūtra "iko guṇavṛddhī", demonstrated by Kaiyaṭa, and brought to a conclusion in the Śabdakaustubha; thus it should be ascertained from there itself. And so, under the verbal root yā, the neuter of the word "śubhaṃyā" in the dative singular was exemplified by Mādhava as "śubhaṃye"; that is not to be accepted: this is the purport.
[On] "svamornapuṃsakāt" (Pāṇini 7.1.23): This elision by luk sets aside the substitution of a for [the stems beginning with] tyad, etc., and the substitution of ka for "kim", by conflict of rules where the prior prevails. For if substitution of a occurred for tyad, etc., due to its being subsequent, then by the substitution of am, it would result in "taṃ kulam".