NEW SPECIES OF FOSSIL SCORPIONS. 401 
margin, have been observed within the postero-lateral angles of those of the 
third and fourth segment, and it is probable that the next two bear them also. 
The ventral portions of the first two segments are only made known by the 
cast of one side of the comb-like organ, a magnified representation of which is 
given in fig. 2g, in which the rachis of the comb is seen to be ornamented by 
a similar embossed pattern to that of L. twberculatus. 
Tail.—Only the first joint of this is preserved in the form of a narrow cylin- 
drical body now flattened, of the same breadth as the posterior margin of the 
seventh segment, and bearing longitudinal crests. The test is smooth, or only 
slightly wrinkled throughout, except on the palpi, which bear a very few 
tubercles. It is from this character, which is so unlike the preceding EF. tuber- 
culatus, that the name is proposed. 
Observations.—As the specimen from which the above description is taken 
is one of the most complete and best preserved of the fossil scorpions in the 
Survey Collection, it may be allowable to make some remarks regarding it. It 
occurs embedded in shale, which has split so well that portion of the specimen 
adheres to one side and portion to the other. Fig. 2a shows the dorsal aspect of 
the parts that are represented by a darker shade, and the cast of the ventral 
surface where it is lighter. Fig. 2 being the counterpart is just the converse. 
In one respect this is unfortunate, as it precludes the possibility of making out 
the character and position of the eyes which have not been observed. On the 
other hand it has given us a view of the parts on the ventral surface of the 
animal. From the manner in which it has been crushed, the abdomen looks a 
good deal broader than it would do otherwise, for not only do we see the full 
breadth of the dorsal plates from a back view, but also a portion of the ventral 
plates bent over, as well as the intervening folded test. I have endeavoured to 
represent the appearance of the fossils to the naked eye as truthfully as possible 
in figs. 2and 2a. To illustrate them by showing my own interpretation of them I 
have prepared fig. 2b, exhibiting the ventral aspect, which combines all the parts 
found in both specimens, the portion of the tail not shaded and drawn with 
dotted lines being the only parts supplied entirely from inference. Both for 
reference to these and the other specimens I have made an outline drawing of a 
recent scorpion in the same position, fig. 1. Fig. 2/¢ shows the posterior 
angles of the third and fourth ventral plates, considerably magnified, to exhibit 
the stigmata for comparison with a corresponding portion of one of the 
segments of a recent scorpion (fig. 2m). An enlarged outline of one of the 
chelicerze is given in fig. 2¢ to show the denticulation. Portions of the two 
last joints of one of the hindermost walking feet, showing the arrangement of 
the spimes and claws, are shown magnified in fig. 24. It is unnecessary to 
enter into the microscopic structure of the test at this stage, for when we come 
to treat of the disjecta membra of the collection, we shall have to discuss it, 
