The Compendium of Suśruta 3.4.4

3.4.4

tasya khalvevaṁpravṛttasya †śukraśoṇitasyābhipacyamānasya[†'śukraśoṇitasya'iti keṣuciddhastalikhitapustakeṣu nopalabhyate/] mānasya kṣīrasyeva santānikāḥ sapta †tvaco bhavanti/ tasāṁ prathamā+avabhāsinī nāma, yā sarvavarṇānavabhāsayati pañcavidhāṁ ca chāyāṁ prakāśayati, sā vrīheraṣṭādaśabhāgapramāṇā, siddhmapadmakaṁṭakādhiṣṭhānā; dvitīyā lohitā nāma, vrīhiṣoḍaśabhāgapramāṇā, tilakalakanyacchavyaṅgādhiṣṭhānā; tṛtīyā śvetā nāma,vrīhidvādaśabhāgapramāṇā, carmadalājagallīmaśakādhiṣṭhānā; carurthī tāmrā nāma vrīheraṣṭabhāgapramāṇā, vividhakilāsakuṣṭhādhiṣṭhānā; pañcamī vedinī nāma, vrīhipañcabhāgapramāṇā, kuṣṭhavisarpādhiṣṭhānā; ṣaṣṭhī rohiṇī nāma, vrīhipramāṇā, granthyapacyarbudaślīpadagalagaṇḍādhiṣṭhānā; saptamī māṁsadharā nāma, vrīhidvayapramāṇā, bhagandaravidradhyarśo+adhiṣṭhānā/ yadetat pramāṇaṁ nirdiṣṭaṁ tanmāṁsaleṣvavakāśeṣu, na lalāṭe sūkṣmāṅgulyādiṣu; yato vakṣyatyudareṣu---vrīhimukhenāṅguṣṭhodarapramāṇamavagāḍhaṁ vidhyediti// [†'śarīre ṣaṭ tvacaḥ;-----'(ca.śā.a.7.sū.5)/ 'ṣaṣṭhī tu prāṇadharā' iti āṣṭāṅgasaṁgrahe pāṭhaḥ/ 'tvaco nāma---sarvadehāvaraṇarūpā bhūmiḥ sparśanevdriyasya srotasāñca svedavahānāṁ, romṇāmapi saromakūpānām/ tāḥ sthūladaṣṭyā staradvayavibhaktāḥ---bahistvagbhāgo+antarastvagbhāgaśceti/ tatra bahistvaṅnāmātīva tanvī kṛṣṇagaurādivarṇādhārā vahnisparśena ploṣapiḍakāvyañjanā ca/ antastvaḍnāma sthūlā śarīrābhirakṣaṇī snehādikarṣaṇī ca/ saiva pradhānāyatanaṁ sparśabhūmeḥ svedasrutāñca mārgāṇām'(pratyakṣaśārīra pra. bhā.pṛ+ 5-6)/]