104 G. F. MATTHEW ON ILLUSTRATIONS OF 
to a point somewhat in advance of the fourth furrow, whence it is regularly rounded to 
the front. 
The glabellar furrows are all heavily cut. The first two cross the axis of the glabella ; 
of these the first is arched decidedly backward, and is somewhat more heavily impressed 
in the outer, than in the middle third. The second furrow strongly indents the glabella par- 
allel to the transverse axis ; it is more lightly impressed in the middle quarter than else- 
where. The two anterior furrows are in pairs. The third fails to cross the glabella by 
less than a third of the glabella’s width ; it begins within the margin of the glabella and 
is directed forward at an angle of about fifteen degrees. The fourth furrow begins on the 
edge of the glabella, and scarcely extends one quarter of the way across it. 
The occipital ring is more than twice as long as wide; it is regularly convex and 
moderately arched vertically ; a little behind the middle of the ring is a short tuberculous 
spine. In some of the largest heads the middle half of the ring is raised into a broad, 
rather flat lobe which bears the spine. The occipital furrow is more strongly impressed 
in the outer quarter than in the middle. | 
The posterior margin is moderately arched backward ; the fold is regularly convex and 
moderately arched vertically. The furrow is scarcely as wide as the fold, and is rounded 
in the bottom. 
The fixed cheek is subtrapezoidal in form, is convex and has an elevation at the pos- 
terior inner angle; it is strongly depressed in front, and the bounding furrows are distinct. 
The ocular lobe makes an open parabolic curve, and is prominently raised all round, but 
especially at the extremities. The curve of the posterior third of the ocular lobe in this 
species is more open than in that of the preceding species or its varieties. 
Sculpture—Parallel raised lines appear only on the front half of the marginal fold, 
where there are about five. Elsewhere the surface of the test is covered with closely set 
granulations visible to the naked eye. 
This neat little species is easily distinguished from all the preceding by its granulated 
surface, and by the absence of raised lines on the front of the glabella. 
Locality, Portland, N.B., in Division 1 c, and young at Hanford Brook, St. Martin’s. 
Growth and Development of the Young. 
Owing to the want of a well preserved test, exhibiting the early stages of this species, 
its growth and development cannot be so well shown as that of P. eteminicus and its allies. 
Nevertheless, there is sufficient to show similar changes of form, as may be gathered from 
the following table :— 
