NOTES AND QUERIES. 
317 
early period by many genera of mammalia, and would servo to encourage a 
hope that the remains of that class might yet be found in beds of even more 
remote age. 
A discussion followed, in which Sir Charles Lyell, Professor Sedgwick, 
Dr. II. Falconer, and otiicrs took part, in wliich the importance attachuig to 
the author's discoveries was recognized. 
NOTES AND QUERIES. 
MoNGEEL Words. — Sik, — lu some late numbers of the " Geologist" you 
did good sei-vice by pointing out inaccuracies of spelling and speaking techni- 
calities. Would you give the weight of your authority against such a mongrel 
word as "lignograph," which, half Greek and half Latin, is not to be com- 
pared in simplicity or force to the good old English word " woodcut P" — Yours, 
&c.. Critic. 
We agree with our correspondent, although we have ourselves used the 
term "lignograph," in condemning mongrel- words ; but "woodcut" is not as 
expressive as "lignograph." Woodcut may be wood hacked, and the merit 
does not entirely lie with the engraver, who is often only a mere machine, but 
usually with the draughtsman. We have no objection to introduce the term 
" xylograph," for " graph" has a broader sense than " cut," if we should 
make up our mind that "lignograph" ought now to be abandoned. Graph, 
from graphos, too, can not be restricted to a mere drawing or writing, it 
originally described real incisions — inscriptions such as the Egyptian hiero- 
glyphics — and what we really want is a word to express an illustration drawn 
and incised on wood. 
Assuredly the word lignograph is a barbarism compounded half of Latin 
and half of Greek, and we have no respect for it ; but as it has got into use, is 
it worth while to change it ? If any one adopts the Greek compound we have 
suggested, we shall be happy to follow the example. 
Drift of Norfolk. — Dear Sir, — In my communication to your magazine 
I have mis-written TeUina Bathica for Tellina Balthica (see page 141, 
lines 31 and 34) ; that is my mistake. In the same page, and in the third 
paragraph, there is an omission wliich obscures the meaning of the author ; in 
the third line, after " embedded in it," the following should be the reading : — • 
" The layers of shingle are composed of very small pebbles of primitive meta- 
morphic and palaeozoic rocks, enclosing an abundance of smaU fragments of ter- 
tiary shells." Will you have the goodness to notice these errors in the next 
nmnber. — Yours faithfully, C. B. Rose, Swaffham. 
Geology of Sligo. — Sir, — As 'I intend visiting the county of Sligo, would 
you have the kindness, through the medium of the " Geologist," to state the 
geology of the county, but more particularly that immediately surrounding 
the towns of Boyle and Sligo. — J. B. B. 
Sligo county consists of an extensive outspread of the Mountain-limestone 
(or Carboniferous limestone lying beneath the Coal-measures), with some 
patches of Millstone-grit, and a wide baud of Devonian and Old Red Sand- 
stone and conglomerate, passing from Lough GUI to Castlebar, with a granitic 
nucleus or axis. Near Sligo the upper part of the carboniferous limestone 
abounds. Near Boyle the Upper Limestone, and some strata of " Yellow Sand- 
stone" of the Devonian series, occur. J. B. B. sho'ild consult Griffith's Geo- 
logical Map of Ireland, either the large sheets or the small map. 
