Miscellaneous. 101 
from the non-classical student, whereby he might have been guided 
among apparently similar words of bewildering construction, and 
have seen at a glance, not only the grammatical value of the trivial 
name, but often the history of the determination of a species, now 
obscured in the featureless dog-Latin of ill-recognized nouns, and 
personal or geographical adjectives of doubtful aspect. 
In the use of proper names it wotld be well if nomenclaturists 
would always apply the genitive in the case of the species being 
named after its discoverer ; and the adjective form when some other 
relationship is in view, such as when a species is named in honour 
of some one connected with the study of the group or of the locality. 
Mr. Miller’s Introduction on the Stratigraphy of the North-American 
Paleozoic rocks is full of information on the nature of the strata 
and their characteristic fossils, as elucidated by the many excellent 
geologists of the United States, Canada, Nova Scotia, &c. The 
maximum thickness of the stratal groups constituting these old 
rocks, as here shown, 1s :— 

feet. 
WP DOMILChOWUS SEEAUR® fa ciale ace oe. S.eya, 4.4 siete « 24,100 
“Dey TT ee a Pee 15,235 
BY ei ATU ooo cre mia aye sive oN oKd cn 3% ses 8,000 
Peer UPN scs: 5 ae cia lere is sic win oie oy hoa 48,745 
Terre et AE eee ey Ces ra os din Fuca et eked oi chord yet oes 20,000 
PAaren nate ee ee NS Eee ay 32,750 
148,830 
Even if the thickness of some of these groups be overestimated, 
and should portions of them be contemporaneous, yet, as some strata 
may have been omitted and others undervalued, the author thinks 
that the hypothetically vertical thickness of the whole is not likely 
to be less than 28 miles, and may be more, and that all but the 
lowest three miles are fossiliferous. He draws strong inferences as 
to the upspring and progress of the organic world by “ processes of 
evolution and the survival of the fittest,’ and insists on the enor- 
mous lapse of time necessary for the accumulation of the strata 
under notice. 
We are sure that this careful and well-printed Catalogue will be 
welcomed by all paleontologists ; and it will be especially useful in 
the comparative study of Silurian fossils as treated in Dr. Bigsby’s 
‘Thesaurus Siluricus’ (see Ann. & Mag. Nat. Hist. ser. 4, vol. iii. 
pp. 314-317), and those of the Devonian and Carboniferous forma- 
tions, amassed and annotated in his forthcoming elaborate volume 
devoted to those fossils. 
MISCELLANEOUS. 
Preliminary Notice of a Species of Phasmide apparently possessing 
all the Structural Arrangements needed both for Aerial and Aquatic 
Respiration. By J. Woov-Mason, F.G.S. 
My attention has just been drawn by my friend Mr. Charles 0. Water- 
house, of the British Museum, to a Phasmidan insect which, of the 
