[Footnote 18: These figures are taken from Platnauer 17 and from page vii of Riese's preface to his edition.]
Ovid admitted quadrisyllable endings more freely if they were proper names. Of the twenty-one quadrisyllable verse-endings in the _Ex Ponto_, six involve proper nouns: II ii 76 _Dalmatiae_, ix 42 _Alcinoi_, the present passage, IV iii 54 _Anticyra_, viii 62 _Oechalia_, and ix 80 _Danuuium_. Professor E. Fantham points out to me that Ovid follows Propertius' similar practice: 42 of the 166 quadrisyllable pentameter endings in Propertius are proper names (Platnauer 17).
The fifteen other instances in the _Ex Ponto_ of quadrisyllabic pentameter-endings are II ii 6 _perlegere_, ii 70 _imperium_, iii 18 _articulis_, v 26 _ingenium_, III i 166 _aspiciant_, IV v 24 _officio_, vi 6 _alterius_, vi 14 _auxilium_, ix 48 _utilitas_, xiii 28 _imperii_, xiii 46 _ingeniis_, xiv 4 _inuenies_, xiv 18 _ingenio_, xiv 56 _imposuit_, and xv 26 _auxilium_.
For Ovid's use of trisyllabic and pentasyllabic endings, see at ix 26 _tegeret_ (page 294) and iii 12 _amicitia_ (p 181).
=11. FERTILE PECTVS HABES.= Compare _Tr_ V xii 37-38 'denique non paruas animo dat gloria uires, / et _fecunda_ facit _pectora_ laudis amor'.
=11. INTERQVE HELICONA COLENTES.= Poets are also described as being on Parnassus at _Tr_ IV i 50, x 23 & x 120. Helicon is the goal of poets at Hor _Ep_ II i 218 (cited at 36).
=12. PROVENIT= continues the agricultural metaphor of _fertile pectus_. For _prouenire_ = 'grow', see _AA_ III 101-2 'ordior a cultu: cultis bene Liber ab uuis / prouenit', _Fast_ IV 617 'largaque prouenit cessatis messis in aruis', and _Nux_ 10; for the metaphorical sense see _Am_ I iii 19-20 'te mihi materiem _felicem_ in carmina praebe-- / _prouenient_ causa carmina digna sua' and _Her_ XV 13-14 'nec mihi dispositis quae iungam carmina neruis / _proueniunt_'.
For _uberius ... prouenit_ compare Caesar _BG_ V 24 'eo anno frumentum in Gallia propter siccitates _angustius prouenerat_'.
=13. MITTERE AD HVNC CARMEN.= Burman printed without comment MITTERE CARMEN AD HVNC, the reading of Heinsius' _fragmentum Louaniense_. It seems to be a mere normalization of the hyperbaton; the elimination of the elision (_mittere ad_) may have been a factor as well.