230 TRANSACTIONS OF THE [may 18, 
Some examples from the St. John group have the axis of the 
pygidium long and a furrow behind, connecting the dorsal and 
marginal furrow; these agree more nearly with the European 
form. The following form, however, is more plentiful. 
Var. CONFLUENS n. var. Plate xvi., fig. 9, a and b. 
This form is found in the eastern part of the St. John Basin. 
It does not quite agree with Broegger’s species, but differs in the 
following respects: 
The head shield is less quadrate behind, the furrows on the 
sides of the posterior lobe of the elabella less undulate, the 
basal lobes longer. The pygidium is more quadrate, the pos- 
terior margin ‘less arched, the posterior lobe of the rachis is 
shorter and wider than in the type, and the side lobes are not 
separated behind the rachis by a furrow. 
Sculpture.—The surface of the test especially in the head 
shield is radially wrinkled. 
Size.—Length and width of each shield, about 4 mm. 
Horizon and Locality.—Dark gray shales of Div. 1 d!,at Por- 
ter’s Brook, St. John county, N. B. 
AGNOSTUS FIssus, Lundgren. 
Agnostus fissus, Linrs. Om faunai Kalken med Conoc. ex- 
sulens, p. 23, tafl. ii., fig. 34. 
Agnostus fissus, Tullb. Agnostus arterna vid. Andrarum, p. 
16, tafl. i., fig. 3, a to d. 
‘“ Head and pygidium shorter and wider [than 4. gibbus]. Test 
scarcely smooth, uneven, marginal fold narrow. Glabella shorter, 
broader, bilobed. Anterior lobe no longer than wide, more or 
less blunt in front, cleft in front by a very delicate line, equal 
to the posterior lobe in width; posterior lobe short for its width, 
one depression visible on each side, reaching its greatest height 
alittle in front of the middle of this part, where an elevated 
point can be seen. Basal lobes small, triangular, scarcely con- 
necting behind the glabella. Cheeks separated by an obsolete 
furrow in front of the forehead, ornamented on each side by ob. 
solete furrows.” 
“ Pygidium short, round, without spines. Rachis with three 
joints, more acuminate than in the preceding, all the joints of 
almost the same width; lateral parts of the anterior joint thick- 
ened; middle joints slightly narrower than the rest, higher, 
keeled, ornamented with a point. In frout of the middle of the 
posterior joint are two lateral obsolete depressions, between 
which an elevated point can be seen. Lateral lobes are connec- 
ted behind the rachis.” 
