Xxiv TRANSACTIONS OF THE PLYMOUTH INSTITUTION. 
"Elvans. — Nine Maidens, Seveock, Wild Duck, St. Stephens, 
Perranzabuloe, Luxulyan, Pentewan, Malpas, Plints Barn, Lizard, 
Cheesewring, Morwell Down, Cann, Eickleigh Yale, Jump, 
Eoborough, Ditto Rock, Okehampton, Shaugh, Cadover, Yannadon, 
Grenofen, Eylesburrow, Cornwood, Ivybridge, Lee Moor, Merivale 
Bridge, Bel Tor, Tavistock, Stollaford, Auswell Rock, Bittadon, 
Rivalton. 
" Granulite. — Okement. 
"Pegmatite. — Cornwood, Harford, Trowles worthy. 
" Luxulyanite. — Two Bridges, Peek Hill. 
" Lithomarge Rock. — Lee Moor. 
" Greisen. — Wigford. 
" Granitic Silt. — Bed of Catte water. 
" China Stone. — Cornwall. 
" YI. Lavas, Ashes, and Tuffs. 
" Devonian (chiefly); Greston Bridge, Clicker Tor, Forcler, St. 
Johns, Obelisk, Mount Edgcumbe, Polscove, Landrake, Weard, 
Albert Bridge, Ernesettle Beach, Saltash Road, St. Bude, Kings 
Tamerton, Honicknowle, Ford, Peveril Park, Milehouse, S willy, 
Thornhill, Tor, Mannarnead, Townsend Hill, Bedford Street, 
Stonehouse Hill, Widey, Egg Buckland, Compton, Lipson, Efford, 
Crabtree, Marsh Mills, Batten, Drake's Island, Colebrook, Hearston, 
Sherford, Brixton, Blackpool, Rattery, Dartington, Ashburton, 
Littlehempston, Staverton, Stoke Gabriel, Slapton, Highweek, 
North Lew. 
"Triassic. — Thorverton, Silverton, Killerton, Pocomb, Washf ord, 
Cawsand. 
"YII. Dolerites, Diabases, Serpentines, Gabbros, Hornblendic 
and general Intrusive Rocks. 
" Mica Trap. — Penryn. 
" Dolerites. — hotter, Weard, Burraton Combe, Forder, Ernesettle 
(collection), Buckfastleigh, Anstey's Cove, Yarner, Oddicombe. 
"Diabases. — Rock, Yealmpton, Lydford, Seaton River, Yarnham 
(collection), Longstone (collection — serpentinous). 
" Serpentines. — Lizard (collection, polished), Clicker Tor, 
Duporth, Poly pliant (potstone). 
" Gabbros. — Houndall, Awns and Dendles, Okehampton, White 
Tor, Wapsworthy, Horndon, Cocks Tor, Brazen Tor, Lydford, 
St. Cleer, Coverack. 
