FROM THE NORTH-WEST AMERICAN COAST. 175 
76. Microcladia Coulteri, Harv. Ner. Bor. Amer. ii. t. 33. A. 
Rocks at low water, Esquimalt, Dr. Lyall. 
77. Microcladia borealis, P. § R.; Harv. Ner. Bor. Amer. ii. p. 210. 
Rocks at low water, Fuca Strait, Dr. Lyall. 
78. Ceramium cancellatum, 4g. 
Rocks and larger Algz, at low water, Esquimalt, Dr. Lyall. 
79. Ceramium rubrum, 4g.; Ner. Bor. Amer. ii. p. 213. 
Esquimalt, Dr. Lyall. 
80. Ceramium diaphanum, Ag. ; Ner. Bor. Amer. ii. p. 215. 
Rock-pools, Esquimalt and Port Roberts, Dr. Lyall. 
81. Ceramium tenuissimum, 4g.; Ner. Bor. Amer. ii. p. 216. (C. no- 
. dosum, Kitz.) 
Dredged in 10 fathoms, Esquimalt, Dr. Lyall. 
82. Ptilota Californica, Rupr.; Ner. Bor. Amer. ii. p. 222. 
Esquimalt, Dr. Lyall. 
Fragments only, much battered. 
83. Callithamnion arbuscula, var. Pacificum. (C. Pikeanum, Harv. Ner. 
Bor. Amer. ii. p. 230.) 
Tidal rocks, Esquimalt, Dr. Lyall. 
The specimens so nearly coincide with Orkney specimens of the 
European C. arbuscula that I cannot keep them specifically apart. 
The branching of the ramuli is less pectinate and more regularly 
pinnate than in the specimen from California on which my * C. 
Pikeanum was founded. 
81. Callithamnion polyspermum, 4g.; Harv. Ner. Bor. Amer. ii. p. 234. 
On rocks, Esquimalt, Dr. Lyall. 
85. Callithamnion thuyoideum, 4g.; Phyc. Brit. t. 269. 
On dead shells, in 10 fathoms, Esquimalt, Dr. Lyall. 
There are several specimens of this elegant species, very closely 
similar to those from the West of Ireland, in Herb. T. C. D. One 
of Dr. Lyall's shows a tendency to pass into “ C. tripinnatum”’ or 
C. gracillimum. 
86. Callithamnion Americanum, Harv. Ner. Bor. Amer. p. 238, t. 36. A. 
On stems of Nereocystis, and dredged in 8-10 fathoms, Esquimalt, 
Dr. Lyall. 
87. CALLOTHAMNION SUBULATUM,n.sp. Fronde rigidiuscula erecta 
alterne decomposita ramosissima, ramis ramulisque opposite pinnatis ; 
pinnis subulatis acutissimis, junioribus nudis, adultis basi intus ramulo 
multifido auctis demum fascieulato-ramulosis; tetrasporis triangule 
divisis ad ramulos secundarios sessilibus. 
On small stones, sandy beach, Esquimalt, Dr. Lyall. 
More rigid than C. Americanum, but seemingly intermediate 
