This declension contains abstract feminines only. Feminines and masculines have identical forms. Long-"i" stems differentiate the Devi and Vrkis feminines, a difference lost in Classical Sanskrit. There are a few feminines with nominative singulars in and stems in . Masculine nouns may be converted into feminines by three processes. Singular masculine nouns usually have the prefix /a-/, and singular feminines the circumfix . In 1902 he published ""Les Modes Feminines du XIX Siecle"" which met with instant acclaim. Only traces of masculines are extant, but feminines are fairly well attested. In feminines, initial usually becomes , initial usually becomes , and initial remains unchanged. Feminines still have "-es" or, if they follow the two-form declension, no ending at all.