130 Reviews—Geological Survey of Canada. 
spines, besides several whose relationships have already been dis- 
covered. We prefer to restrict the vague term, however, to the 
fossils of the first category. The classification is not very satis- 
factory. Lrismacanthus cannot be claimed to have much similarity 
to a dorsal fin-spine, nor Harpacanthus to an unsymmetrical pec- 
toral; they seem much more like such head-spines as those of 
Hybodus, Acrodus, the Chimeroids, and Squaloraja. An unfortu- 
nate error, moreover, occurs in fig. 180, in which Tristychius 
arcuatus is named Harpacanthus arcuatus. Harpacanthus was pro- 
posed by Dr. Traquair for a spine erroneously referred to Tristychius, 
and not for Agassiz’s type-species of this genus. Pristodus is not 
very appropriately placed with undetermined Ichthyodorulites, when 
Mr. Robert Etheridge’s description of P. Benniei' is taken into 
account. Moreover, it is satisfactory to be able to add that one of 
the most characteristic of Ichthyodorulites, Asteracanthus, has quite 
lately passed to its correct systematic position, having proved to 
belong to the Cestraciont Shark with the teeth named Strophodus.? 
A. Sa Wie 
(To be continued.) 
II.—GrotoercaL anp Narurat History Survey oF Canapa. 
Annual Report (New Series), Vol. II. 1886. Accompanied by 
Geological and Topographical Maps, Sections, Plates, and 
Woodcuts. Royal 8vo. pp. 976 and xxix. (Montreal, 1887.) 
T will only be possible in the limited space at our command, to 
give a very brief account of the contents of this large volume, 
which contains the reports of the Field Geologists and of others 
connected with the Survey, commencing with a ‘‘ Summary Report ” 
by the Director. Hach of the thirteen reports which make up the 
volume are, as usual, distinguished by a letter of the alphabet and 
separately paginated, with a view to their separate issue. We shall 
take them seriatim, omitting Mr. J. B. Tyrrell’s report, which has 
already been reviewed in this Magazine.°® 
The Director’s report contains a brief résumé of the operations of 
the Survey for the year 1886, and is especially interesting for the 
information it gives respecting the mineral products of the Dominion, 
samples of which were exhibited at the Indian and Colonial 
Exhibition, South Kensington, 1886. The following are particularly 
mentioned :—plumbago, mica, soapstone, asbestos, gold and silver 
ores, manganese, petroleum, ochres, slate, granites and marbles, 
agates, &c., phosphate. 
The reports of the Field Geologists begin with that of Dr. George 
M. Dawson (pp. 1B—129B) ;--‘‘ On the Northern part of Vancouver 
Island, from Comox to Quatsino Sound, with the coasts of adjacent 
Islands, and portions of the mainland.” 
The report is divided into “General Geology” and <“ Descriptive 
Geology.” The Queen Charlotte Islands (southern half) and 
1 Gzou. Mae. [2] Vol. II. (1875), p. 248, Pl. VIII. Figs. 3, 4. 
2 Ann. Mag. Nat, Hist. [6] vol. ii. p. 336, pl. xii. 
3 August, 1888. 
