292 The American Geologist. May, 1892 
cardinal processes is unknown. In thin sections it is shown that 
the crural plates of the brachial valve do not converge medially 
and join with the posterior end of the median septum as in Wald- 
heimia, but that they probably coalesce with each other; a med- 
ian septum is not present. Muscular scars undetermined, Shell 
structure impunctate, distinctly fibrous, 
Type. Hallina saffordi, n. sp. 
Named in honor of the veteran palivontologist, of Albany, N. Y. 
Halling saffordi and H. nicolleti do not show a punctate shell 
structure, either in thin section or on the exterior surface of the 
shell. The rudimentary deltidial plates, absence of a median 
septum in the brachial (dorsal) valve, and the impunctate shell 
structure will distinguish //a//ina from Waldhermia and related 
genera, 
This is the earliest known terebratuloid genus, and it is repre- 
sented by two abundant and widely distributed species 
Hallina saffordi. 
Shell very small, rostrate, regularly elongate, oval, striate and 
evenly bi-convex. — Pedicle (ventral) valve somewhat more conyex 
than the other; point of greatest elevation about mid-length, 
slightly carinated, but otherwise evenly convex in all directions. 
Beak strongly incurved, but not in contact with the umbo of the 
brachial valve, with a small pedicle opening which is partially 
surrounded anteriorly by incomplete  deltidial plates. Teeth 
well developed and supported by delicate, strongly oblique dental 
plates; other interior characters undefined, 
Brachial valve evenly convex with a very shallow sinus in the 
anterior half. Brachial supports straight from the crural plates 
for a short distance forward, then bending backwards and later- 
ally, turn and proceed forwards a short distance beyond mid- 
length, and nearly parallel to each other, where they bend rather 
abruptly upwards, and medially join ata point which isat about 
one-half the length of the calcified brachia. Thin sections do 
not show strongly thickened crural plates, nor a median septum 
amalgamated with the former atthe posterior end. There is prob- 
ably a small cardinal process present. 
Surface marked with from 15 to 20 subangular strie, which 
terminate on the posterior third of the valve; no concentric lines 
