ASTARTF. 



CONCHIFERA. 



211 



Coral Crag and Mammiferous Crag, Sutton, &c. 



8. AsTARTE OBOVATA. — The Obovato Astarte, pi. 

 LXXXVII. fig. 21. 



A. olocalx. Sowerby, IV. p. 73, pi. 353. 



Uniformly convex, obovate ; anterior ninrgin sub-truncated ; 

 lunette impressed ; surface corrugated, with the transverse 

 obscure ribs most visible on the anterior portion ; interior 

 margin crcnated. 



Tbe Lower Greensand, Hythe and Sandown Bay. 



9. Astarte borealis. — The Nortlicrn Astarte, pi. 

 LXXXVII. fiir. 1. 



A. plana. Sowerby, II. p. 173, pi. 170, 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, BriJington, Braniorton, and 

 "O'ick. 



10. Astarte obliquata. — The Somewhat Obli(|ue Astarte, 

 pi. LXXXVII. fig. 19. 



A. ohliqiMta. Sowerby, II. p. 173, pi. 179, fig. 3. 



"Obovate, transverse, depressed ; surface with many oblique, 

 concentric striw, which traverse a few obscure ribs or lines 

 of growth ; internal margin crenulated ; spaces between the 

 stria; rounded and smooth ; substance of the shell slender. 



The Rod Crag, Sutttm. 



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 furrows 

 with numerous fine, minute strire ; substance of the shell thin ; 

 margin entire. 



Greensand, Blackdown, an<l the Kinimerage Clay, Iled- 

 dington. 



2. Astarte obliqua. — The Oblique Astarte, pi. 

 LXI.***, fig. 27. 



A. planata. Sowerby, III. p. 103, pi. 257. 



Gibbosc, transversely obovate ; anterior side sligiitly trun- 

 cated ; lunette concave, somewhat heart-shaped ; surface with 

 many small, obtuse, close-set, concentric ridges ; edge fre- 

 quently broad and flat, and crossed by furmws, which are 

 a continuation of the crenulations ; substance of the shell 

 thick. 



The Inferior Oolite, Barton and Uundry. 



13. Astarte rlgata. — The Wrinkled Astarte pi- 

 LXXXVII. fig. 30. 



A. riyatus. Sowerby, III. p. 13, pi. 31 C. 



Obovate, rather gibbose ; anterior side sub-truncated ; 

 lunette, obovate, concave, and pointed ; a few ribs at and be- 

 low the beaks, under which the surface is slightly wrinkled 

 transversely ; edge internally crcnated. 



In the young state, the surface is covered witli diatinct transverse 

 ribs, nbich become obsolete in tbe adult. 



London Clay, Ilighgate and Sheppy. 



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 stria} ; margins obtuse ; substance of 

 the shell thick. 



The Greensand, Blackdown and Lyme Regis. 



15. Astarte rotinda. — The Rounded Astarte, pi. 

 LXXXVII. figs. 35, 3G. 



A. ovhicuhiris. Sowerby, VI. p. 35, pi. 520, fig. 2. 



Lenticular, somewhat inflated, particularly towards tlio 

 beaks ; lunette elongated and very deeply seated, and com- 

 posed of two pianos, which meet in an acute angle in the 

 middle ; surface with small concentric furrows ; posterior sur- 

 face plaited, with an angle at its edge ; internal edge with 

 elongated crenulations ; substance of the shell very thick. 



Great Oolite, Hampton Clifl", Bath. 



If). Astarte trigonalis. — The Trigonal Astarte, pi. 

 LXXXVII. fig. 29. 



A. trigonalis. Sowerby, V. p. G3,* 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. Astaete orbicularis — The Orbicular Astarte, pi. 

 LXXXVII. figs. 27, 28. 



A. orlicularis. Sowerby, V. p, 64,* pi. 444, figs. 2, 3. 



Lenticular ; hinge-line terminating in a projecting angle ; 

 surface with numerous concentric, slightly elevated, reflected 

 lamella? ; edge smooth. 



Great Oolite, Anclifie. 



18. Astarte pumila. — TheDwarf Astarte, pi. LXXXVII. 

 figs. 2, 3, 4. 



A. pumila. Sowerby, V. p. G4,* 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 furrows are equal in width ; 

 edge strongly crenulated within ; when old, the length exceeds 

 the width. 



The Great Oolite, Ancliffe, Wiltshire. 



19. Astarte impolita. — The Unpolished Astarte, pi. 

 LXXXVII. figs. 5, 6. 



A. impoUla. Sowerby, Geo. Tr. 2d Ser. IV. p. 341, pi. 16, 

 fig. 18. 



Obovate, convex, somewhat wedge-shaped ; rather angular 

 at the beaks ; lunette situate in a lanceolate groove ; surface 

 with numerous antiquated transverse grooves. 



The Greensand, Blackdown. 



20. Astarte .multistriata. — The Many Striated Astarte, 

 pi. LXXXVII. figs. 32, 33. 



A. multistriata. Sowerby, Geo. Tr. 2d Scr. 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, tbe 

 intervening sp.aces with fine longitudinal stri;o ; lunette very 

 large and broad. 



The Greensand, Blackdown. 



