PLATE XLIT. 
1. Scalaria Frondosa. ( Leafy Scalaria.) Conical, tarreted ; with seven or eight, distinct volutions, with twelve, 
longitudinal, membranaceous, reflected ribs; with concave spines above upper margins. 
2. S. Foiacea. ( Foliated Scalaria.) Turreted ; with seven or eight, disunited volutions, with broad-based, longi¬ 
tudinal, reflected ribs ; aperture circular, without umbilicus. 
3. 4. S. Reticulata. ( Reticulated Scalaria.) Subulate, short; with eight, inflated, acuto volutions, with many, lon¬ 
gitudinal ribs, crossed by nine or ten, spiral striae; columella hollow ; base smooth. 
5, 6. S. Similis. ( Similar Scalaria.) With eight or nine volutions, with remote, circular, longitudinal ribs; with 
row of five or six, spiral ribs ; aperture ovate; lips broad. 
7, 8. S. Interrupta. ( Interrupted Scalaria .) Subulate; volutions united, convex; with many, longitudinal ribs ; 
with a large varix on each volution, with spiral striae between the ribs ; aperture circular; all the ribs united by thread¬ 
like, spiral nb. 
9, 10. S. Subulata. ( Subulate Scalaria.) Subulate, turreted; with eight, contiguous volutions ; with ten or twelve, 
thick, longitudinal ribs, reflected ; aperture circular; without cord around base and without umbilicus. 
11,12. S. Acuta. (Acute Scalaria.) Turreted; with eight or nine, well-marked volutions ; with many, longitudinal, 
recurved ribs; with three, spiral, depressed ribs from base to apex, and a fourth near lower margin of each volution; aper¬ 
ture circular, with margin reflected. 
13. S. Undosa. (Waved Scalaria.) Subulate; volutions united, convex; with about twenty-four, waved, longitu¬ 
dinal ribs, and crossed by many, spiral stria?, ending in transverse band ; base smooth. 
14,15. S. Minuta. (Minute Scalaria.) Turreted; with seven or eight, smooth volutions, each, with about twenty 
obtuse, straightish, longitudinal ribs ; aperture ovate, with narrow lip all round; without umbilicus. 
16, 17. S. Semicostata. (Semi-ribbed Scalaria.) With about seven, contiguous, inflated volutions; with many, lon¬ 
gitudinal ribs, halfway down each volution; upper portion with spiral strife; aperture circular. Length, | in. 
18. S. Plicata. (Plaited Scalaria.) Elongated; with eleven or twelve, inflated volutions; apex acute; with many, 
longitudinal ribs ; base of body smooth ; aperture ovate ; lips smooth, rounded. 
19. S. M Utica. (Barbless Scalaria.) Sub-turreted; with seven, inflated volutions and about sixteen, longitudinal 
thick, reflected ribs on each volution ; with about four, flat, narrow, spiral ribs between longitudinal ones; aperture circular • 
margin thin. 
20,21,22. Euomphalus Coronatus. (Crowned Euomphalus.) Discoidal, flat above; with volutions on same plane 
margin, with carina of broad, sharp spines; volutions below rounded, concave; umbilicus central. 
23. E. Calyx. (Flower-cup Euomphalus.) Depressed; with three or four volutions ; volutions, with narrow carina on 
external margin ; base deeply concave. f 
24,25. E. FunatUS. (Corded Euomphalus.) Sub-conic, very short, with three depressed volutions; with a row of 
narrow, thread-like, spiral ribs ; crossed by many, transverse strife; umbilicus small; base with several concentric ridges. 
26, 27. E. Angulatus. (Angular Euomphalus.) With three, depressed volutions, and row of three, spiral ribs on 
their upper surface; with many, longitudinal, sub-imbricated, irregular stria?; base, with five, concentric ribs, crossed by 
remote strife ; aperture obscurely octangular. 
28, 29. E. Pentangulatus. (Five-angled Euomphalus.) With five or six, depressed volutions ; volutions, with acute, 
spiral carina; base, with angular, concentric ridge ; crossed by fine, sharp stria?; aperture obscurely pentangular; deeply 
umbilicated. 
30,31. E. Catillus. (Little-Dish Euomphalus.) Depressed; with four or five, exposed volutions, with central carina; 
one side deeply umbilicate; aperture sub-triangular. 
32,33. E. Discors. (Discordant Euomphalus.) Sub-depressed; with three or four volutions, with wide-set, trans¬ 
verse stria?; with spiral carina; with five, spiral ribs; base of body volution smooth, large, rounded; with centre deep, 
umbilicate. 
34, 35. E. RllgOSUS. (Wrinkled Euomphalus.) With three or four, depressed volutions, crossed by oblique, undu¬ 
lating's trite; under surface of body with strong, transversely curved plaits; deeply umbilicate; aperture sub-ovate. 
36. E. Crist at US. (Crested Euomphalus.) With three, wide-set, smooth volutions; exterior margin with row of 
large and small, conical, recurved, tooth-like processes. 
37,38. E. Noclosus. (Knotty Euomphalus.) Depressed, smooth; with four volutions; upper sido, with central, 
spiraFridge; under side, with central, spiral series of ovate, nodular elevations; aperture orbicular; under surface forming 
cup-shaped, hollow cone. 
39. E. Bifrons. (Double-fronted Euomphalus.) With three, rounded volutions; with spiral series of orbicular, promi¬ 
nent tubercles, obtusely angulated, umbilicated. 
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