60 HENRY B. BRADY. 
C. subglobosa, nov.—A large, thick, few-chambered, subglo- 
bular shell; the dorsal margin gibbous and rounded, 
the ventral less convex; aperture in the form of an 
obliquely-set loop on the ventral face of the terminal 
segment. Diameter, -,'; inch (0°7 mm.). 
ENHRENBERGINA, Reuss. 
Ehrenbergina hystrix, nov.—Shell somewhat ovate in gene- 
ral form, the superior end broad and rounded. Segments 
few, regular and alternate on the dorsal face, confused 
on the ventral, their free ends terminating in lateral 
spines. The sutural lines on the dorsal side marked 
by rows of spines, sometimes fused into a fringe-like 
projection from the shell-wall; the ventral surface of the 
earlier segments also beset with stout spines or tuber- 
cles. Aperture large, curved, situated in a depression 
on the inflated face of the terminal segment, which is 
ornamented externally with radiating lines, Length, 
=; inch (0°75 mm.). 
Lacena, Walker & Jacob. 
Whilst the simplicity of the typical structure of Lagena 
limits the range of variation in general form, it appears to 
favour the production of an endless diversity of surface 
ornamentation. It is impossible to recognise as “ species,” 
or by any word of similar significance, the successive terms 
of a series where every intermediate link may easily be 
found ; nor is it easy under such circumstances to select the 
points where the chain may best be broken to form groups 
which have any approach to true specific value. In append- 
ing names, therefore, to some of the more striking and more 
easily defined modifications of the genus, it is to be under- 
stood that they are no more than varietal or subvarietal 
distinctions. Under these circumstances it has not been 
thought necessary, at the moment, to do more than indicate 
characteristic peculiarities, whether of contour or ornament. 
Lagena botelliformis, nov.—Test unornamented ; long, cylin- 
drical, of even diameter, arcuate, ends rounded ; entoso- 
lenian. ) 
L. quinquelatera, nov.—A five-sided modification of L.devis ; 
angles shar) or carinate ; surface unornamented or very 
faintly striate ; ectosolenian. 
L. stelligera, nov.—P yriform, ento- or ecto-solenian, with a 
circular rim or collar at the base, one third the diameter 
of the shell, and a number of short ribs (8—12) radiat- 
ing from it. 
