PLATE LXVII. 
I, 2, 6. Perna Mytiloides. (Mytilus-formed Perna.) Mytiliform, elongated; posteriorly incurved; liinge-line 
curved, oblique; ligamentary grooves, seven or eight, elongated; beaks obtuse; surface smooth, with shallow, 
concentric lines of growth. 
B, 4. Lima Subovalis. ( Sub-oval Lima.) Quadrangular, elongated; with many, rounded ribs, each with 
distant, obtuse scales. 
5. Catillus Mytiloides. (Mytilus-shaped Catillus.) Equivalved, depressed, elongated; convex, obtuse 
towards beaks; beaks short, sharp-pointed; posterior side produced; hinge-line oblique; surface, with slight, 
irregular undulations. 
7. L. Antiquata. (Antiquated Lima.) Elliptical, depressed; anterior ear deeply wrinkled, open ; smaller 
ear striated; surface, with many, coarse, longitudinal striae. 
8, 9. L. Gibbosa. (Gibbose Lima.) Elongated, gibbose, oblique ; ears undefined; surface smooth, with a 
series of radiating sulci in centre of valves. 
10. Gervillia Laminosa. (Laminated Gervillia.) Oblique, inflated hinge-line, with auriform processes on 
both sides of beaks; surface smooth, with concentric hues of growth; base rounded. 
II. L. Rudis. (Rugged Lima.) Obovate, oblique, inflated; anterior ear open, with thickened lobes; the 
other small, with thick, inflated edges to valves; surface, with about seven, large, convex, rugged, longitudinal 
.ribs; edges of valves thick, reflected. 
12. Pinna Inflata. (Inflated Pinna.) Conical, inflated; beaks central; surface, with many, small, close-set, 
equal sulci. 
13, 14. L. Semisulcata. (Half-furrowed Lima.) Oblong-ovate, convex ; auricles small, equal; beaks in¬ 
curved, short; disc, with series of twelve to sixteen, rounded ribs, crossed by lines of growth ; sides smooth. 
15. Posidonia Vetusta. (Ancient Posidonia .) Sub-ovate, convex; beaks prominent; sides straight, rounded 
below; surface smooth, with broad, concentric ribs and shallow sulci; anterior side with space like a lunette. 
16. G. Laminosa. (Laminated Gervillia.) (A cast.) V. Fig. 10. 
17. Avicula Lunulata. (Crescent-shaped Avicula.) Oblique, arcuated; hinge-line very oblique; auricles 
unequal; posterior side lengthened, with strongish, concentric ridges; anterior side short; beaks obtuse; surface, 
with slight, imbricated striae. 
18. G. Squamosa. (Scaly Gervillia.) Very oblique ; hinge-line straight; one ear large, the other small; 
posterior side ridged; surface, with scaly striae. 
19. P. Flabelliformis. (Fan-shaped Pinna.) Elongated, narrow, straight; beaks acute ; centre of valves, 
with many, longitudinal, narrow, deep grooves, crossed by remote, concentric lines of growth. 
20. L. Proboscidea. (Proboscis Lima.) Sub-ovate, broad, convex ; ears small; surface, with about twelve, 
elevated, rounded ribs, each tvith several, large, tubular processes, with funnel-shaped termination. 
21. C. Cuvieri. (Cuvier's Catillus.) Convex, ovate, curved; anterior side concave, with small, smooth lobe 
near beak ; beaks short, rather acute; hinge-line long; surface, with transverse, distant, shallow sulci; lines of 
growth laminated. 
22. C. LaBvis. (Smooth Catillus.) Oblong-ovate, smooth; with many, concentric, obsolete wrinkles ; um- 
bones small, rounded. Length, J in.; breadth, | in. 
23. C. Obliquatus. (Oblique Catillus.) Ovate, smooth ; umbones large; surface, with several, distinct lines 
of growth ; sides unequal. 
24. C. Kirkmani. (Kirlcman’s Catillus.) Oblong-ovate, convex, smooth; sides equal, with four, concentric 
lines of growth ; umbones prominent, central, rounded ; with several, concentric lines of growth; margins sharp, 
even. 
25. C. Costatus. (Ribbed Catillus.) Oblong, ovate; with many, flat, longitudinal, small ribs, crossed by 
many, distinct lines of growth. Length, \ in.; breadth, f in. 
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