[MACKAY] BIBLIOGRAPHY OF CANADIAN BOTANY 147 
_PENHALLOW, DP: 
“A Contribution to our Knowledge of the Origin and development of 
Certain Marsh Lands on the Coast of New England.” (By the examination 
of a vertical section he shows that there was an abrupt conversion of a 
fresh water bog into a salt marsh, due to the gradual subsidence of the 
general area subsequent to Pliocene coastal shallow basins on the Atlantic.) 
Trans. Roy. Soc. Canada, iii, 14, 13-56, 5 pl. 8 fig.; Ottawa, 1907. 
PENHALLOW, D. P. 
“A Blazing Beach.” Pop. Sci., No. Ixx, 557-564, illustrated; June, 1907. 
PENHALLOW, D. P. 
. “A Manual of the North American Gymnosperms.” (Exclusive of the Cyca- 
dales but together with certain exotic Species.) 8vo., pp. vili x 374 
pls. 55; Boston, Ginn & Co., 1907. 
PENHALLOW, D. P. 
“The Pulp-Wood Industry of Canada.” (Read at the Natural History 
Society of Montreal, Session 1906-7.) 
PENHALLOW, D. P. 
“Notes on Botanical Specimens presented by Miss Bickley.” (Read at 
the Natural History Society of Montreal, Session 1906-7.) 
PENHALLOW, D. P. 
“ À Report on Fossil Plants from the International Boundary Survey for 
1903-1905. Collected by Dr. R. A. Daly.” (From British Columbia 
territory; illustrated by nine full page plates.) Trans. R.S.C., ili, 14, 19, 
pp. 287-352; Ottawa, 1907. à 
PENHALLOW, D. P. 
“Notes on Fossil Woods from Texas.” (Description of several species and 
inferences as to character of the Eocene flora, illustrated by 4 plates (8 fig.) 
showing microscopie sections of the wood.) Trans. WSC.; ais, Gi pp: 
93-114; Ottawa, 1907. 
PENHALLOW, D. P. 
“Contributions to the Pleistocene flora of Canada.” (Includes new species 
of Acer and Gleditchia.) Am. Nat. xli, 443-452, f i, 2; 17 July, 1907. 
PENHALLOW, D. P. 
“ Report on a Collection of Fossil Woods from the Cretaceous of Alberta.” 
(Picea alberteneis, n. sp.; Cupressoxylon macrocarpoides, Penh.; Sequoia, 
albertensis, n. sp.; with six figures illustrating microscopic structure of 
tissue.) Ott. Nat. xxii, 4, pp. 82-88; Ottawa, 10 July, 1908. 
PENHALLOW, D. P. 
“ Some Fossil Plants from the Middle Devonian of Milwaukee, Wisconsin.” 
(Nematophycus milwaukeensis and Fucus bertheletensis, spp. nov.) Bull. 
Wisc. Nat. Hist. Sec. vi, 8--11, pl. 1, 2; April, 1908. 
