336 G. J. HINDE ON ANNELID JAWS FROM 
IV. Annelid Jaws from the Lower Carboniferous of Scotland. 
The specimens which I have collected from the above formation are 
so few and, for the most part, so fragmentary, that it would have been 
hardly worth while to mention them but for the consideration that 
such objects have not, to my knowledge, been previously noticed in 
any formation in this country, and, further, that not only do they 
appear in strata of more recent age than those in which I have 
met with them in America, but they also show a close relationship 
to those jaws which come from the Cambro-Silurian formation. The 
paucity of my collection is due to the fact of its having been the 
result of only two days’ search in two or three adjoining quarries in one 
locality ; but, judging from the variety of small detached fragments, 
it is not improbable that a search specially made for these minute re- 
mains will show that they are as abundant in Britain as in Canada. 
The shaly limestone in which the specimens were imbedded does not 
appear so favourable for preserving them as the more arenaceous de- 
posits; but they have, when not too much weathered, the same black 
glistening appearance, and are in a similarly detached condition. 
I am only able, from the fragmentary state of the fossils, to 
give descriptions of four jaws, three of which I include in one 
species of the genus Hunicites, and one belongs to the generally dis- 
tributed genus Arabellites. All the examples are from limestone 
quarries at Cults, in Fifeshire. 
EUNICITES AFFINIS, Hinde, (Pl, XX. figs. 21, 22, 23.) 
The imperfect specimen (fig. 21) consists of the front portion, with 
two upright blunted teeth, of a jaw apparently resembling that of 
EHunicites major from the Cincinnati group. ‘The length of the frag- 
ment is 13 line, and its width ? line. 
Fig. 22 is a simple elongated jaw with a short curved tooth, the 
posterior portion expanded and flattened, whilst the narrow part is 
angular in section. Length 13 line. 
‘This appears to be one of the paired pincers of Humicites; it is 
similar to the form described as HL. simplex, also from the Cincinnati 
group; but the hook is shorter and more strongly curved, and the 
extremity is more compressed. 
Fig. 23 is a small, compressed, oblong plate with five rounded teeth, 
of which the first is curved and projects outwards, and the other four 
are short, straight, and subequal. It may be a portion of a jaw 
belonging to Hunicites ; from its occurrence in close proximity with 
the simple hook, fig. 22, it is not unlikely to have been from the same 
Annelid as that specimen. 
ARABELLITES scoticus, Hinde. (Pl. XX. fig. 24.) 
Jaw crescentiform, concave, rounded in front, the posterior blunted 
end somewhat truncate. On the arched crest eight teeth can be 
distinguished, of which the first is considerably longer than the rest ; 
but as this and the following two have been partially crushed, their 
original form cannot be satisfactorily ascertained, The smaller teeth 
