a6 SAN DIEGO SOCIETY OF NATURAL HISTORY 
LORENZ (Th.)—Continued 
ture. Trachyostracus has a thick, rough shell; Liostracus a smooth, finely porous shell. 
These two genera exhibit a rare case of convergence. 
Examples of this species are the two following forms: Solenopleura Howleyi Wale. 
and Ptychoparia limbata Matt. 
Under Liostracus Angelin, as emend. by Brogger, the author includes Liostracus 
microphthalmus Ang., fig. 4. Plychoparia Piochensis Walcott. Anomocare planum 
Dames. Liostracus Linnarssoni Brogger, L. aculeatus Ang. 
Macrotoxus n. gen.: The principal characteristics consist in the very long arch- 
shaped eyes, the deep dorsal furrows and the thick, rough shell. The author refers 
Anomocare Angelini Gronwall and Conocephalites perseus Hall to the genus. 
Alokistocare new genus: This genus has in common with Macrotoxus the long, 
arch-shaped eyes, and the long dorsal furrow around the glabella. By its porous shell 
we 
it is differentiated from the former. The author refers Ptychoparia subcornata H. & 
W. to this genus. 
Megalophthalmus new genus: Also here are the long, arch-shaped eyes the prin- 
cipal element. The glabella does not lie deeply in the head shield, but comes out high 
over the cheeks. Even trace of dorsal furrows is lacking. The shell is thick, rough, 
not porous. : 
The author refers Liostracus megalurus Dames and Anomocare minus Dames to 
this new genus, remarking that it is not improbable that this group is also distributed 
in North America. In its external appearance it resembles throughout the old Swedish 
species of Anomocare. ‘The last, however, has a highly porous shell. 
Under the genus Anomocare the author includes dnomocare latelimbatum Dames, 
A. excavatum Ang., dA. limbatum Ang. Liostracus Maydelli Schmidt, Anomocare 
commune n. sp. and A. laeve Ang. 
The author places Conocephalina Brégger and Conocephalites Barrande, under two 
groups, on the difference of the ornamentation of the test, using Ptychoparia Emmrichi 
for the type of the first genus, with granulated shell; and Concephalites ornatus Brog- 
ger for the second genus, although Brégger used this for his type. 
The author figures Ptychoparia Emmrichi Barr. also Conocephalites ornatus Brogger 
and C. suecicus Wallerius. 
The author gives the following description of the new genus Amphoton with the 
species 4. Steinnanni for its type: 
Glabella narrow, highly cylindrical, with deep furrows. On both sides of the high 
glabella wing-shaped, similuna-shaped cushions, that resemble ears on a great ele- 
phant head. The eyes are long, box-shaped and stand upright. The anterior eye 
corners lie close to the glabella. The facial sutures follow the eye lobes, diverging 
slightly from the anterior eye corners to the frontal margin. From the rear eye cor- 
ners it branched outwardly into a horizontal piece before it cuts through the rear 
margin; thereby forms a small band attached to the rear of the cheek. Close to the 
front end of the glabella is a narrow, flat, bent-up edge. The pygidium greatly re- 
sembles that of Anomocare, for in a slab of fossils from Laiwa, are found numerous 
head shields of this species, corresponding to head and tail shields of Anomocare. 
On page 91, the author describes <Jmomocare commune n. sp. (referred by Walcott to 
Anomocarella chinensis Walcott); also Anomocare ovatum uv. sp. and A. speciosum n. 
sp. (referred by Walcott to the genus Anomocarella). 
The author includes a description of Olenus sp. Ptychoparia (Solenopleura) sp., and 
the description of a new genus Schantungia, with S. Buchruckeri for its type (this has 
been referred by Walcott to Chuangia nitida). 
The other fossil crustacea described in this work are: Schantungi Monkei n. sp. 
Liostracus latus n. sp. A gnostus fallax Linrs. var. Laiwuensis n. var. A. parvifrons 
