PLATE XLI. 
1, 2. Solarium Discoideum. (Discoidal Solarium .) Discoidal; spire, with five or six volutions ; outer edge of body 
volution, with very sharp carina and shallow canal; upper margin broad, undulated, with spiral stria); umbilicus deep, 
transversely wrinkled; aperture rhomboidal; outer lip acute at margin. 
3, 4. S. Canaliculatum. (Canalled Solarium.) Discoidal, convex ; body, with prominent, crenated margin, with 
many, spiral, granulated lines; umbilicus furrowed, crenated internally; aperture circular. 
5,6. S. Conoideum. {Conical Solarium.) Conical, smooth; volutions depressed, with decussating striae; umbilicus 
deep, narrow, with inner, spiral ridges crenated; aperture rhomboidal. 
7,8. S. Sowerbyii. ( Sowerby's Solarium.) Discoidal; spire depressed; umbilicus large, with crenulations on mar¬ 
gin, striated internally. 
9,21. Cirrus Nodosus. (Knotty Cirrus.) Conical, rugose, reversed; body large, discoida]; spire acutely conical, 
with ten or eleven, flat-sided volutions, ■with narrow' suture and two rows of lengthened tubercles, and crossed by many 
small carina©; body, with four rows of spiral carina©, crossed by many tubercles ; with fine, regular strife between transverse 
stria©. 
10,11. S. Plicatum. (Plicated Solarium.) Convex, sub-discoidal; upper surface longitudinally wrinkled, with 
three or four, narrow, spiral sulci; with small umbilicus, with produced, crenated ridge ; with five or six, concentric sulci • 
aperture orbicular. 
12, 13. S. Patulum. (Spreading Solarium.) Depressed, discoidal, smooth; volutions, with crenulated carina; um¬ 
bilicus wide, with crenulated margin, with border of small denticles ; with fine, longitudinal stria©; base, with divergent 
stria?. 
14. S. Tabulatum. (Boarded Solarium.) Pyramidal, sub-turreted ; volutions, with carinated margins ; apex acute • 
with wide-set, longitudinal strife; base flat; umbilicus small. 
15. S. Calyx. (Chalice Solarium.) Pyramidal, turreted; body large; spire small, with four, flat-sided volutions 
with crenulated, spiral bands; base flattish; umbilicus expanded; aperture quadrangular. 
16. C. Pentag’onalis. (Pentagonal Cirrus.) Conical, obtuse; body large; spire, short, with sub-pentagonal volu¬ 
tions ; base flattish, with acute margin; umbilicus large, deep, with acute margin ; aperture sub-ovate, transverse ; outer 
lip thin; inner lip reflected on columella. 
17. C. Cingulatus. ( Small-girdled Cirrus.) Sub-conic, sub-depressed, turban-shaped; spire, with spiral, longi¬ 
tudinal strife; each volution, with smooth girdle; body, with many, longitudinal, smooth bands ; base rounded; apex 
obtuse. 
18. C. Spiralis. (Spiral Cirrus.) Conical; body large ; spire short, with three, rounded volutions ; apex sub-acute • 
base rounded ; with strong, spiral, longitudinal, oblique stria?. 
19. C. Leachii. ( Leach's Cirrus.) Conical; volutions, with many, longitudinal strife, with several rows of tubercles 
crossed by many, small carinee; upper row of tubercles on body, with strong, compressed spines. 
20. C. PlicatUS. (Plicated Cirrus.) Conical; body large; spire small, with four, flat-sided volutions; with widish 
spiral stria©; base angular; aperture sub-quadrangular; umbilicus plaited, small. 
22. C. PileopsideilS. (Cap-like Cirrus.) Depressed; body large; spire small, with three, flattened volutions; with 
irregular, arcuated strife. 
23. 25. C. AcutllS. (Acute Cirrus.) Conical; body large; spire short, with six or seven, ventricose volutions, each 
with obscure carina; apex acute; base rounded; umbilicus funnel-shaped, expanding; aperture orbicular; surface, with 
fine strife. 
24. C. Turbanoides. (Turbaned Cirrus.) Reversed; body volution discoidal; with spire, of which four or five, 
superior volutions conical; apex acute ; with divergent ribs ; aperture sub-ovate. 
26, 27. C. RotundatUS. (Bounded Cirrus.) Conical, smooth ; volutions convex; base rounded; umbilicus large; 
aperture orbicular; with fine strife. 
28. C. Tabulates. (Boarded ■ Cirrus.) Sub-conic, depressed; volutions few, sub-quadrate, tabulate, with upper 
margins acute ; aperture transverse, ovate. 
29,30. C. Depressus. (Depressed Cirrus.) Depressed, sub-discoidal ; volutions, with deep, wide, canaliculate suture; 
aperture obtusely angular ; with strong, spiral stria©. 
31,33. C. Perspectives. (Perspective Cirrus.) Obtusely conical; volutions six or seven, convex; base flattened; 
umbilicus wide, deep; aperture transversely oblong; surface, with fine, spiral strice; inner surface pearlaceous. 
32. C. CarinatUS. (Keeled Cirrus.) Discoidal, smooth; spire depressed, with three or four, ventricose volutions, 
carinated; umbilicus large, deep ; aperture transverse, sub-ovate. 
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