166 DR. HARVEY ON A COLLECTION OF ALGE 
13. Costaria Turneri, Grev. (C. Turneri and C. Mertensii, J. Ag. Sp. 
Alga, i. p. 139, 140; Harv. ; Ner. Bor. Amer. i. p. 90.) 
Rocks at low water ; Fuca Strait and Esquimalt, Dr. Lyall. 
The numerous and, beautifully preserved specimens sent vary 
with fronds cordate-ovate, ovate, ovato-lanceolate, and lanceolate, 
these forms passing insensibly one into another. The largest sent 
by Dr. Lyall are upwards of a foot wide and 2} feet long, and 
are frequently perforated toward the base. When full-grown, the 
fronds measure 10-12 feet in length. 
14. AGARUM FIMBRIATUM, n. sp. Stipite compresso-plano demum 
fimbriato-pinnato, costa latiore continuato, lamina membranacea bul- 
lata hic illic foraminibus irregularibus raris pertusa, basi subcordata, 
margine crispato eroso-fimbriato. 
Dredged in 4-10 fathoms; Esquimalt Harbour, Dr. Lyall & C. Wood. 
Stipes 1-2 inches long, flattened, 3—4 lines wide, at first simple, 
afterwards pinnated with horizontally patent, root-like, subulate 
processes, continued through the frond as an immersed costa, 
4-6 lines wide. Fronds 2-3 feet long, 1-14 wide, cordate at 
base ; the margin strongly curled, and in all the older specimens 
jagged and fimbriated with irregular excurrent processes. The 
younger fronds are very much blistered (bullated), but have few 
foramina. The older are irregularly perforated with holes of un- 
equal size and different shape, more abundant toward the margin. 
This must be near A. pertuswm, P. & R., but differs in the fim- 
briated margin and stipes, if these be constant characters. More 
specimens are needed to ascertain this point. 
15. Laminaria saccharina, 4g. ; Harv. ; Ner. Bor. Amer. i. p. 92. 
Esquimalt Harbour, &c., common, Dr. Lyall. 
Of this common plant many varieties are sent ; some with very 
broad, others with narrow fronds, both varying greatly in propor- 
tionate length to breadth. Some have strictly ovate fronds, not 
more than once and a half as long as broad ; others ovato-lanceolate, 
four times as long as broad; and others lanceolate and linear- 
lanceolate, many times as long as broad. One has a nearly orbi- 
cular frond! The substance varies from membranous to coriaceous, 
and the colour from olive-green to dark brown. 
16. Laminaria dermatodea, De la Pyl.; Ner. Bor. Amer. p. 92. 
Fuca Strait and Esquimalt, Dr. Lyall & C. Wood. 
A series of specimens, young and mature. The younger and 
uncloven specimens differ from L. saccharina in their flattened, 
