saṃgraha, with which it occasionally agrees in whole çlokas.
Of great importance for the understanding of the sacrificial ceremonial are the Prayogas ("Manuals") and Paddhatis ("Guides"), of which a vast number exist in manuscript. These works represent both the Çrauta and the Gṛihya ritual according to the various schools. The Prayogas describe the course of each sacrifice and the functions of the different groups of priests, solely from the point of view of practical performance, while the Paddhatis rather follow the systematic accounts of the Sūtras and sketch their contents. There are also versified accounts of the ritual called Kārikās, which are directly attached to Sūtras or to Paddhatis. The oldest of them appears to be the Kārikā of Kumārila (c. 700 A.D.).
Of a supplementary character are also the class of writings called Anukramaṇīs or Vedic Indices, which give lists of the hymns, the authors, the metres, and the deities in the order in which they occur in the various Saṃhitās. To the Rigveda belonged seven of these works, all attributed to Çaunaka, and composed in the mixture of the çloka and trishṭubh metre, which is also found in Çaunaka's Rigveda Prātiçākhya. There is also a General Index or Sarvānukramaṇī which is attributed to Kātyāyana, and epitomises in the Sūtra style the contents of the metrical indices. Of the metrical indices five have been preserved. The Ārshānukramaṇī, containing rather less than 300 çlokas, gives a list of the Rishis or authors of the Rigveda. Its present text represents a modernised form of that which was known to the commentator Shaḍguruçishya in the twelfth century. The Chhandonukramaṇī, which is of almost
