380 G. J. HINDE ON ANNELID JAWS FROM 
Genus Lumpriconrererirss, Ehlers, 1868. 
Lumbriconereites, Ehlers, Paleeontographica, Band xvi. p. 159. 
Ehlers based this genus on the resemblance of some fossil Annelids 
in the Solenhofen shales to those of the existing genus Lumbri- 
conerets. In his specimens only the lower jaws appear to have been 
recognizable, whilst my own examples, which I propose to place 
under this genus, resemble the principal jaw-plate in the upper jaw ; 
they are not unlike the corresponding plate in the jaws of Hunicites, 
but possess a well-defined basal flange or extension. 
LUMBRICONEREITES DAcTYLoDuS, Hinde. (Pl. XVIII. fig. 20.) 
Jaw oblong, straight, and nearly of uniform width, in the central 
portion a well-marked protuberance ; at the front end are four curved 
rounded teeth bent upwards and inwards, whilst on a slightly ele- 
vated ridge, which springs obliquely from the basal flange, is a series of 
eighteen small rounded teeth. Length nearly 23 lines, width #? line. 
Guycrritrs, Hinde. 
Jaws consisting of a simple curved hook with a wide base, without 
smaller teeth, resembling those of the existing genus Glycera. 
GiycERitEs sutcatus, Hinde. (PI. XIX. fig. 1.) 
Jaw oblong, relatively wide and convex, obliquely truncate; from 
the truncated end a deep longitudinal furrow extends nearly to the 
front, where it opens into a cavity which extends below the hook ; 
this is stout, slightly curved, and somewhat bent inwards. Length 
1 line, nearly 3 line in width. . 
This is a very abundant form, and very distinctly marked by the 
deep subcentral furrow. 
GLYCERITES SULCATUS, var. EXcAVATUS. (Pl. XIX. fig. 10.) 
The hooked portion in this jaw closely resembles that just de- 
scribed, but the posterior end is relatively wider and hollowed out, 
and instead of the central furrow there is a deep groove which ex- 
tends round the inner edge of the main portion of the jaw. Length 
1 line, width 3 line. 
This variety is also comparatively abundant in the same localities 
with G. sulcatus. 
In addition to the above, there are some aberrant forms which I 
am unable to place under any of the known genera of Annelids 
which have come under my notice. I have figured three examples 
on Pl. XIX. figs. 17, 18, and 20, and append short descriptions of 
each. 
Fig. 17 is a straight, nearly linear, form, with ten upright teeth, 
very unequal in size; four of these are very prominent and nearly 
triangular in form. ‘Total length 1 line. 
Fig. 18 is small, narrow, and slightly convex, the front portion 
conyex, rounded, and with a small tooth; the jaw posteriorly is thin 
and flattened, and has seyen minute blunted teeth. Length 3 line, 
