Asia rtf. 
CONCIIIFERA. 
211 
Coral Crag and Mammiferous Crag, Sutton, &c. 
8. Astarte obovata. —The Obovate Astarte, pi. 
LXXXV1I. fig. 21 . 
A. obovata. Sowerby, IV. p. 73, pi. 3.53. 
Uniformly convex, obovate ; anterior margin sub-truncated ; 
lunette impressed ; surface corrugated, with the transverse 
obscure ribs most visible on the anterior portion ; interior 
margin crenated. 
The Lower Greensand, Hythe and Sandown Bay. 
0 . Astarte borealis. —The Northern Astarte, pi. 
LXXXVII. fig. 1. 
A . plana . Soworby, IT. p. 173, pi. 179, fig. 2. 
Depressed, sub-orbicular, and nearly equilateral ; beaks 
rather small and pointed; lunette elongated, acute, and deep ; 
surface with irregular fine lines of growth ; margin entire. 
Pleistocene Marine Formation, Bridington, Bramerton, and 
Wick. 
10 . Astarte obliquata. —The Somewhat Oblique Astarte, 
pi. LXXXVII. fig. 19. 
A . obliquata . Sowerby, II. p. 173, pi. 179, fig. 3. 
Obovate, transverse, depressed; surface with many oblique, 
concentric stria), which traverse a few obscure ribs or lines 
of growth; internal margin crenulated; spaces between the 
striae rounded and smooth; substance of the shell slender. 
The Red Crag, Sutton. 
11 . Astarte lineata. —The Lineated Astarte, pi. 
LXXXVII. fig. 37. 
A. lineata. Sowerby, II. p. 174, pi. 179, fig. 1. 
Obovate, nearly lenticular, depressed; anterior side 
smallest and slightly truncated ; lunette lanceolate and small ; 
cartilage slope long and straight; surface with about thirty 
concentric, acute, transverse ribs; the intervening furrow’s 
with numerous fine, minute stria?; substance of the shell thin ; 
margin entire. 
Greensand, Blackdowm, and the Kimmerage Clay, Had¬ 
dington. 
2 . Astarte obliqua. —The Oblique Astarte, pi. 
LXI.***, fig. 27. 
A. planata. Sowerby, III. p. 103, pi. 257. 
Gibbose, transversely obovate ; anterior side slightly trun¬ 
cated ; lunette concave, somewhat heart-shaped ; surface with 
many small, obtuse, close-sot, concentric ridges; edge fre¬ 
quently broad and fiat, and crossed by furrows, which are 
a continuation of the crcnulations ; substance of the shell 
thick. 
The Inferior Oolite, Barton and Dtindry. 
13. Astarte rugata. —The Wrinkled Astarte pi* 
LXXXVII. fig. 30. 
A. rugatus. Sowerby, III. p. 13, pi. 316. 
Obovate, rather gibbose; anterior side sub-truncated; 
lunette, obovato, concave, and pointed ; a few ribs at and be¬ 
low the beaks, under which the surfaco is slightly wrinkled 
transversely ; edge internally crenated. 
In the young state, the surface is covered with distinct transverse 
ribs, which become obsolete in the adult. 
London Clay, Ilighgate and Shoppy. 
14. Astarte striata. —The Striated Astarte, pi. 
LXXXVI. fig. 40. 
A. striata. Sowerby, VI. p. 35, pi. 520, fig. 1. 
Lenticular; beaks small, approaching near to each other; 
lunette ovate, flat, deeply impressed ; surface with very nume¬ 
rous, regular, transverse stri;c; margins obtuse ; substance of 
the shell thick. 
The Greensand, Blackdowm and Lyme Regis. 
15. Astarte rotunda. —The Rounded Astarte, pi. 
LXXXVII. figs. 35, 36. 
A. orbicularis. Sow r erby, VI. p. 35, pi. 520, fig. 2 . 
Lenticular, somewhat inflated, particularly towards the 
beaks; lunette elongated and very deeply seated, and com¬ 
posed of tw T o planes, which meet in an acute angle in the 
middle ; surface with small concentric furrows ; posterior sur¬ 
faco plaited, with an anglo at its edgo; internal odgo with 
elongated crcnulations; substance of the shell very thick. 
Great Oolite, Hampton ClilT, Bath. 
16. Astarte trigonalts. —The Trigonal Astarte, pi. 
LXXXVII. fig. 29. 
A. trigonalts. Sowerby, V. p. 63,* pi. 444, fig. 1 . 
Triangularly heart-shaped, compressed; beaks rather acute ; 
anterior side smooth, and separated by an angle; posterior 
edge concave near the beaks; surface somewhat flattened; 
disk with numerous, rather shallow, transverse furrows, which 
terminate on the ridge. 
The Inferior Oolite, Dundry. 
17. Astarte orbicularis. —The Orbicular Astarte, pi. 
LXXXVII. figs. 27, 28. 
A. orbicularis. Sowerby, V. p. 64,* pi. 444, figs. 2, 3. 
Lenticular; hingo-lino terminating in a projecting angle; 
surface with numerous concentric, slightly elevated, reflected 
lamella?; edge smooth. 
Great Oolite, Ancliffe. 
18. Astarte pumila. —The Dwarf Astarte, pi. LXXXVII. 
figs. 2, 3, 4. 
A. pumila. Sowerby, V. p. 64,* pi. 444, figs. 4, 5, 6 . 
Obliquely ovate, slightly convex ; anterior side produced 
and obtuse; posterior side small, with a semicircular edge; 
surface with numerous concentric, narrow, slightly raised 
ridges, to which the intervening furrow’s aro equal in width ; 
edge strongly crenulated within; when old, the length exceeds 
the width. 
The Great Oolite, AnclifFe, Wiltshire. 
19. Astarte impolita. —Tho Unpolished Astarte, pi. 
LXXXVII. figs. 5, 6 . 
A. impolita. Sowerby* Geo. Tr. 2d Ser. IV. p. 341, pi. 16 ? 
fig. 18. 
Obovate, convex, somewhat wedge-shaped; rather angular 
at the beaks; luuetto situato in a lanceolate groove; surface 
with numerous antiquated transverse grooves. 
The Greensand, Blackdown. 
20 . Astarte multtstriata. —Tho Many Striated Astarte, 
pi. LXXXVII. figs. 32, 33. 
A. multistriata. Sowerby, Geo. Tr. 2 d Ser. IV. p. 341, 
pi. 16, fig. 17. 
Sub-triangular, very convex, somewhat wedge-shaped ; 
beaks turned much to one side, and a considerable concavity 
below them ; surface with many concentric, elevated ribs, the 
intervening spaces with fine longitudinal stria?; lunette very 
large and broad. 
The Greensand, Blackdowm. 
