TRILOBITES. 
and but slightly trilobate at the fulcral point, which lies far 
out. The tail is very gently convex, and scarcely trilobed 
at all. 
It is not certain this does not belong to the next species, 
but it is remarkably flat, whereas that is convex; and the gen¬ 
eral habit is so different, that I think I am quite right in 
separating them. 
Locality .—Chorhoti Pass. Damchen. (Nos. 1678, 1743.) 
3 ILUENUS PUNCTULOSUS. 
Plate 2, figs. 10, 11. 
I. capite 1—sphserico, valde trilobato, punctuoso. Sulci axillares 
profundi modice remoti, capitis medium haud attingentes. Oculi 
magni a sulcis subremoti, marginem posticum approximati. 
Head a quarter of a sphere, strongly trilobed; the furrows 
which mark out the glabella lie in deep depressions, and are 
strong, only moderately distant, and do not reach quite half¬ 
way up the head. The large eyes are rather remote from 
these, and much less than their own length distant from the 
posterior margin. [The cheeks are wanting, except in 
fragments.] 
The back part of the glabella is convex, almost gibbous, and 
overhanging—an unusual character. Moreover, the whole sur¬ 
face of the head is strongly punctuated, and over the front por¬ 
tions wavy lines are closely set,—parallel to the border. These 
lines fail on the lateral and hinder regions, over which the 
puncta are still thickly scattered. They, as well as the stria- 
tions, show also on the inner cast, but of course more faintly. 
The rostral shield (the true hypostome) beneath the front 
margin of the head is very broad and large, with equidistant 
strise, but no puncta. Me have not the labrum. 
The shape of the head is not at all unlike that of III. Bow- 
manni. The projecting back of the glabella distinguishes our 
species from all British forms, and the large puncta separate 
