Por 



312 



Port du Moulin (Sark), ' false-bedding ' 



in hornbl.-schists of, xliii. 324 fig. ; 



section descr. & fig., xlviii. 128. 

 Port of Ness (Lewis), cliff-sections at, 



xxxiv. 825. 

 Port Darwin (Australia), radiolar. rock fir., 



xlix. 221-226 & pi. v. 

 Port Elizabeth (Cape Colony), salif. beds 



nr., xxvii. 507 ; section to Somerset, & 



plan, xxxi. pi. iv. 

 Port Gower (Sutherland), section at Allt 



Gartymore nr., xxix. 133. 

 Port Hood (Cape Breton), erect foss. trees 



& Stigmaria at, x. 23 fig. 

 Port Isaac (Cornwall), amygdal. lava of, 



xxxiv. 482, 483 w. chem. anal. 

 Port Lloyd (Bonin Is.), tidal wave at, xi. 



532. 

 Port Nicholson (N. Z.), geol. of, xi. 530. 

 Port Nolloth (S. Africa), section to Coles- 

 berg Kopje, xxx. 58. 

 Port Philip (Victoria), goldfields of, ix. 



74-79. 

 Port St. Mary (I. of Man), section to Per- 



wick Bay, x. 213. 

 Port Stanley (Falkland Is.), overflow of 



peat-bog nr., xxxv. Proc. 96. 

 Portage Brule (Canada), section to Gulf 



of St. Lawrence, xx. 129. 

 Portage des Bois (Canada), ' greenstone- 

 con glom.' at, viii. 404 fig. 

 Portage Flags (Pennsylvania), cone-in- 

 cone in, 1. 732. 

 Portage Group (Silur.), iv. 154 ; in N. Y. 



State, xiv. 386, 438. 

 Portage Mouille (Canada), trap-vein in 



granite nr. , viii. 404 fig. 

 Portencross (Ayr), Silur. at, xv. 3, 4. 

 Poetee, H., Occurr. of Foss. Wood in 



Oxf. Clay nr. Peterborough [abs.], xix. 



317-318. 



, obituary of, xxv. p. xxxvi. 



Porth Clais (Pembroke), junct. of granite 



w. Cambr. strata, plans & section, xxxix. 



275 et seqq. ; Cambr. & Dimet. at, w. 



plan & sections, xl. 531, xlvi. 264; 



section to Castell, xxxix. 268, xl. 535; 



raised beach W. of harbour, xlviii. 293 



fig. 

 Porth Corwg, see Porth y Corwg. 

 Porth Din Lleyn (Caernarvon), so-called 



serpentine of, xxxvii. 48-50; fragmental 



rocks at, xlix. 162. 

 Porth Dinorwig (Caernarvon), halleflinta 



(?) of, xxxv. 296, 305; metamorphic 



series betw. Twt Hill and, xxxv. 321- 



326. 

 Porth Hayog (Pembroke), view, looking 



S., xl. 305. 

 Porth Lisky Bay (Pembroke), Dimet. & 



Pebid. in, xl. 540 fig., xlvi. 263 ; 



P. Point, section to nr. St. David's, 



xxxiii. pi. x. ; granite nr., xxxix. 271 



et seqq. 

 Porth Llanlliana (Anglesey), view in, xliv. 



520. 

 Porth Llechog (Anglesey), plan of hill- 

 crest W. of, xliv. 522. 



Porth Lygan (Anglesey), section to Porth 

 y Corwg descr. & fig., xxx viii. 17, 18. 



Porth Meudwy (Caernarvon), dyke at, xlix. 

 146. 



Porth Nobla (Anglesey), section to Aber- 

 ffraw Sands descr. & fig., xxxvii. 216 & 

 pi. viii. 



Porth Oer (Caernarvon), basalt-spheroid 

 at, xlix. 149 ; chem. anal, of rocks fr., 

 xlix. 148; flow-brecciat. in rocks nr., 

 xlix. 151, 152 ; variolite at, xlix. 153, 

 154. 



Porth Orion (Caernarvon), basalt-spheroids 

 at, xlix. 150 ; variolite nr., xlix. 155. 



Porth Rhyffydd (Anglesey), cleavage & 

 contort, shown in promontory E. of, 

 xliv. 481 fig. 



Porth Seli (Pembroke), section to cliffs 

 nr. Nun's Chapel, xxxix. 268, xl. 524. 



Porth Treiddyn (Caernarvon), traces of 

 glacier-action at, i. 153-155. 



Porth Witlin (Caernarvon), gabbro at, 

 xlix. 146. 



Porth y Corwg (Anglesej'), section along 

 coast S. of, xxxviii. 18 ; grits of, xl. 569, 

 586, 587. 



Porth y Defaid Fault (Anglesey), xxxvii. 

 224 ; section to Pen Bryn'r Eglwys 

 descr., xxxvii. 224. 



Porth y Gwichiad (Anglesey) ' overfault ' 

 in black shale, xl. 570. 



Porth y Lywod (Anglesey), plan of shore 

 W. of, xliv. 491. 



Porth y Rhaw Creek (Pembroke), geol. 

 map & section, xx. 240 ; section thro' 

 Menev. rocks at, xxxi. 372 ; do. to St. 

 David's, facg. xxxiv. 166. 



Porth yr Ogof Fault (Anglesey), xxxvii, 

 226. 



Porthalla, or Porthallow (Cornwall), ser- 

 pentine nr., xxxix. 21 ; do. & assoc. 

 rocks, xl. 458-473 w. maps, sections, & 

 chem. anal. ; section at foot of cliffs, 

 xlvii. 471. 



Portheus, gen. char, of, xxxiii. 509 ; diff. 

 fr. Daptinus, xxxiv. 439 et seqq. 



Daviesii, sp. now, xxxiii. 511 & 



pi. xxii. 



gaultinus, sp. nov., xxxiii. 512 & 



pi. xxii. 



Ifantelli, sp. nov., xxxiii. 510; restor- 

 ation of skull, xxxiii. 518 fig. 



Porthoustock Cove (Cornwall), rocks of, 

 xlvii. 491. 



Portland, I. of, foss. bones in, viii. 109 ; 

 sections fig. & descr., viii. 119, xxxviii. 

 721, Proc. 121 ; do. in Imosthay Quarry, 

 descr., xlvi. 279; pheuom. of Quatern. 

 period in, xxxi. 29-54 & pi. i (map & 

 sections) ; Portland rocks in, viii. 110- 

 120, xxxvi. 190 & pi. viii (section) ; Pur- 

 beck ostrac. fr., xli. 325 ; Cimoliosaurus 

 portlandicus fr. Middle Purbeck of, xlvi. 

 47, 48 figs. ; raised beach of, xlviii. 277 

 section. 



Portland Bill, cliff-section at, viii. 117 ; 

 raised beach at, viii. 118, xiii. 41 ; sec- 

 tions to Dorchester, xxxi. pi. i. 



