194 
CONCHIFERA. 
Ax IN US. 
O. triangularis. Phillips, Geo. York, I. pi. 3, fig. 31. 
Sub-triangular, wedge-shaped, anterior side obliquely straight; 
beaks pointed, surface smooth, with a few remote lines of 
growth. 
The Coral Rag, Mai ton, Yorkshire. 
19. CucuLLiEA cylindrical—T he Cylindrical Cucullsea, pi. 
LXXVI1L fig. 17. 
C. cylindrical Phillips, Geo. York, I. pi. 9, fig. 20. 
Transversely elongated, cylindrical, and ventricose ; beaks 
prominent, approximating, and situate towards the anterior 
side; posterior side with a ridge emanating from the beaks, 
and terminating on the basal margin; surface with many 
elevated, concentric ridges. 
Great Oolite, White Nab, Yorkshire. 
20 . CuculljEa concinna.—N eat Cuculkea, pi. LXXVIII. 
fig. 18. 
C. concinna. Phillips, Geo. York, I. pi. 5, figs. 9 and 
31. 
Transversely elongated ; short; moderately inflated, beaks 
rather large ; anterior sido rounded ; posterior side obliquely 
truncated and flattened, with a ridge from the beak to the 
margin, and longitudinally striated; anterior sido obscurely 
ribbed; hinge-lino lengthened ; base gently curved. 
The Oxford Clay, Scarborough, and the Kelloways Rock, 
Cove. 
21. CucuLLjEA imperial is.—The Imperial Cuculkea, pi. 
LXXVIII. fig. 20. 
C. imperial is. Phillips, Geo. York, I. pi. 9, fig. 19. 
Transversely lengthened; inflated; anterior sido rather 
short; posterior side hollow, considerably elongatod ; beaks 
very large, prominent, incurved, and approximate; superior 
portion of the surface with wide-set radiating striae, extending 
downwards for more than half the length of the valve ; crossed 
by remote concentric linos of growth; basal line nearly 
straight, with a slight hollow near the centre. 
The Great Oolite, Cloughton Wyke. 
22. CtJCDLLiEA arouta—T he Sharp Cuculkea. 
C. arguta. Phillips, Geo. York, II. p. 210, pi. 5, fig. 20. 
Transversely lengthened; posterior sido angulated ; beaks 
situate near tho anterior sido ; surface with deep regular fur¬ 
rows parallel to the margin. 
The Carboniferous Limestone, Bolland, Yorkshire. 
23. Cucullasa obtusa,—T he Obtuse Cucullma. 
C. obtusa. Phillips, Goo. York, II. p. 210, pi. 5, fig. 19. 
1 rausversely lengthened; oblong-oval; anterior side short, 
a little indexed ; posterior side obliquely sub-truncated and 
reticulated ; hinge-lino and base nearly parallel; beaks rather 
large and obtuse. 
24. Cucull.ea depressa.—T he Depressed Cuculkea. 
C. depressa. Phillips, Pal. Fos. p. 42, pi. 17, fig. 71. 
Oblique; sub-triangular; its breadth and length nearly 
equal; cardinal area narrow ; surface smooth. 
The Devonian Strata, Marwood. 
2,3. Gucullasa amygdalina.— I ho Almond-shaped Cucul¬ 
kea. 
C. amygdalina. Phillips, Pal. Fos. p. 40, pi. 18, fig. 66. 
Transversely elongated ; width double its length ; anterior 
side short and rounded ; posterior side much acuminated and 
somewhat depressed, with a ridge extending from the beaks to 
the extreme point below; surface with concentric lines of 
growth ; beaks obtuse. 
Tho Devonian Shales, Marwood, North Devonshire. 
26. Cucull/ea IIardingii. —Hardings Cuculkea. 
C. Hardingii. Sowerby, Geo. Tr. 2d Ser. Y. pi. 53, figs. 
26, 27. Phillips, Pal. Fos. p. 40, pi. 18 and 19, fig. 67. 
Transversely oblong-oval; posterior side large and obliquely 
sub-truncated; anterior short and rounded; beaks rather large 
and rounded, and obtuse ; surface smooth. 
Devonian Shales, Marwood, North Devon. 
27. Ctrci’LLvEA angusta. —The Narrow Cucullaea. 
C. angusta. Sowerby, Geo. Tr. Y. pi. 53, fig. 25. Phil¬ 
lips, Pal. Fos. p. 41, pi. 19, fig. 68. 
Sub-quadrangular, length exceeding the width ; convex ; 
anterior side rounded ; posterior side truncated, angular above 
and a little so below; beaks small, nearly central; surface 
smooth. 
The Devonian Rocks, Marwood. 
28. Cucull.ea SULCATA.—The Furrowed Cuculkea. 
C. sulcata. Sowerby, Geo. Tr. 2d Ser. III. p. 119. 
29. Cucull.ea trapeziform. —The Trapeziform Cuculkea. 
C. trapezium. Sowerby, Geo. Tr. 2d Ser. Y. pi. 53, fig. 
23. Phillips, Pal. Fos. pi. 19, fig. 70. 
Nearly quadrangular, or trapezoidal; convex; anterior side 
rounded ; posteriorly truncated and large; surface smooth ; 
hinge-line sub-triangular; beaks rather prominent. 
The Devonian Shales, Marwood, North Devon. 
30. CuClTLLA2A TJNI LATERALIS.— 
G. unilateralis. Sowerby, Geo. Tr. 2d Ser. V. pi. 53, fig- 
24. Phillips, Pal. Fos. p. 41, pi. 19, fig. 69. 
Obliquely ovate; inflated; posterior side oblique, flattened; 
beaks nearest tho anterior side, which is short and slightly 
rounded. 
The Devonian Shales, Marwood, North Devon. 
Genus XIII.—AXINUS.— Sowerby. 
Shell equivalve, transverse, free, posterior side very short, 
rounded ; hinge provided with a long, oblique ligament, situate 
in a furrow, stretching along the whole edge; anterior sido 
considerably produced, angulated, and somewhat obliquely 
truncated, with a flattisli lunette near the beaks. 
1. Axinus (?) latus. —The Broad Axinus, pi. LXXIX. 
fig. 4. 
Transversely elongatod; beaks blunt, placed much to the 
anterior side, which is short, and gently rounded ; posterior 
side much lengthened, and somewhat acuminated ; breadth 
double its length; basal line very little curved; surface 
smooth. 
In the Sandstone, Yalo of Todmorden Yorkshire. 
2. Axinus dubius. —The Doubtful Axinus, pi. LXXIX. 
fig. 8. 
I rausversely elongated, slightly curved ; anterior side short, 
and somowhat narrowed ; posterior side lengthened and broad ; 
basal line moderately arcuated. 
Sandstone, Yale of Todmorden. 
3. Axinus obscurus.— -The Obscure Axinus, pi. LXXIX. 
figs. 5, 6, 7. 
