NATURAL SCIENCES OE PHILADELPHIA. 
133 
Goniatites Allei, Win. The most perfect specimens seen were collected 
by A. W., at Germain’s quarry, Hillsdale, Michigan. Apertural constrictions , 
occur at regular intervals. 
Goniatites Marshallensis, Win. Collected by A. W., at Napoleon Cut, 
Jackson county, Michigan. 
Occurs also at Weymouth, Medina county, Ohio, 80 feet below the conglo¬ 
merate. Whittlesey’s collection. 
PHILLIPSIA, Portlock. 
Phillipsia Doris, Win. (=Proetus Boris , Hall, xiiith Rep. N. Y. Regents, 
p. 112.) This species was established by Hall on some pygidia occurring in 
the Goniatite limestone at Rockford, Indiana. I am in possession of several 
pygidia from this locality which agree with his description, though in the ab¬ 
sence of measurements, it may be that his specimens are much larger. Associa¬ 
ted with these are numerous fragments of bucklers, which prove that the trilo- 
bite is a Phillipsia. The head is furnished with a border sloping downwards, 
and separated from the cheeks by a deep but narrow groove ; the middle of 
the border is marked by a groove which reaches from a point opposite one 
eye, to the corresponding point on the other side of the head ; in some speci¬ 
mens the latter groove reaches backward to the posterior borders of the buck¬ 
ler. The cheeks are raised abruptly above the border, and terminated by 
spinous points which are ornamented with raised longitudinal strim, and ex¬ 
tend backwards a distance equal to one-third the whole length of the cepha¬ 
lic shield. The principal lobe of the glabella is in the form of a prolate 
semi-ellipsoid, is almost destitute of furrows, and is supported on each side 
by a large complementary lobe. The surface is obscurely granulose. The 
pygidium is in the form of a semi-ellipse, with the longer diameter trans¬ 
verse ; it is convex, with a gibbous axis, obtuse posteriorly, and articulated 
to the extremity. The lateral lobes are a little narrower than the axis, and 
theii; terminal points join the extremity of the axis. The pygidium is bor¬ 
dered by a plain belt .curved downwards around its margin, and barely mark¬ 
ed by a continuation of the articulations—except the two which bound it 
anteriorly. Number of segments in the axis, 11; in the side lobe, 7 ; surface 
the same as in the buckler. 
Width of pygidium, -35; length, *21 ; width of axis at anterior end, -12 ; 
width of border, ’04. Length of buckler of another specimen, -31. 
Proetus Mtssouriensis, Shumard, (Missouri Report, p. 196, pi. B, fig. 13. a, b,) 
would seem also to be a Phillipsia , as well as its Ohio representative, Proetus 
auriculatus , Hall, (xv. Rep. N. Y. Regents, p. 107.) Pictet says of Proetus , “La 
glabelle est lobde par des sillons.” and of Phillipsia , “ La glabelle est com- 
posee d’un grande lobe median simple, et de deux petits lobes latero-poste- 
rieurs.” Furthermore, Proetus Swallovi, Shumard. (loc. cit .) does not pre¬ 
sent the posterior termination of the great suture required by the genus to 
which it stands referred. 
Phillipsia Rockfordensis, n. sp. Cephalic shield surrounded by a nar¬ 
row, convex border, which is bounded internally by a narrow but deep 
groove, and terminates posteriorly in conically tapering genal points. The 
principal lobe of the glabella is relatively very large, convex, highest in the 
middle, widened anteriorly, circularly rounded in front, and gently curved on 
the sides ; no glabellar furrows are present. The complementary lobes are 
large, oval, and project laterally farther than the main lobe. The surface of 
the test of the glabella is finely, but sharply granulated ; that of fhe border 
is finely striated. Size about the same as that of P. Boris. 
Collected by A. W., at Rockford, Indiana. 
Cythere crassimarginata, Win. Collected by A. W., at Alan’s and Ger¬ 
main’s quarries, Hillsdale, Michigan. 
University of Michigan, Ann Arbor, 13 th May , 1865. 
1865.1 
