1895. ] NEW YORK: ACADEMY OF SCIENCES. 127 
LINGULELLA ? INFLATA. PI. v., figs. a and b. 
Trans. Roy. Soe. Can., vol. iii., sec. iv., p. 33, pl. v., figs. 7 and 
Ta. 
Beside the type described in the above Transactions, there is a 
variety of an oval form occurring with it, which presents some 
peculiarities of structure not observable in the first examples 
found. 
var. OVALIS, n. var. Pl. v., figs. 4a to ce. 
Only the ventral valve is known. This is very tumid, rounded 
down at the sides, arched from beak to front,so that the highest 
part of the valve is about one-third from the beak; in outline 
the valve is ovate, with rather straight diverging sides for one- 
quarter of its lensth, thence rounded forward at the sides, and 
rather abruptly rounded to the front. There is a callus within 
the valve at the beak; this surrounds the pedicle furrow or 
tube, or at least encloses it at the sides and front. The 
foramen appears to open under the beak. There is a partial (as 
in Obolella gemma) or complete deltidial area, but in none of 
the specimens obtained is this area completely exposed. 
Sculpture. This consists of rather strong concentric ridges, 
and somewhat widely set radiating ridges. 
Size. Length 4 mm.; width 3 mm. 
Horizon and locality. The dark gray sandstone of Assise 1, 
at Hanford Brook. 
The rarity of dorsal valves of this variety and of the type of 
L.(?) inflata would perhaps indicate that they were thinner and 
more perishable than the ventral valves. 
These little shells approach Linnarssonia more nearly in 
form than Lingulella, and the variety especially is so tumid 
that it might be taken at first glance to be an Ostracod. » This 
species and L, (2) celata Hall are seemingly of the same genus 
and should be separated from Lingulella. They havea deltidial 
area elevated at an angle from the plane of the ‘lower side of the 
valve,in which respect they resemble Linnarssonia and Acro- 
treta. It also seems probable that they possess a foramen and 
not a pedicle groove; this is strongly indicated in var. ovalis 
and Messrs. Hall and Clarke figure L. (2) celata as possessing 
a small pit at the apex. JL. (2) cvlata is more nearly related to 
Acrothele and Acrotreta than to Lingulella and with L. (2) in- 
Jlata belong to that group of small foraminiferous brachiopods 
so common in the Lower Cambrian. 
