88 



many small (prominent) costse ; lunule cordate ; margin crcnu- 

 lated within."* 



This, as it names implies, is a very neat form. It is "by no 

 means uncommon, especially at Bradford Abbas. It is reported 

 from the Cotteswolds and also from Dtindry, in Somerset. 

 Proportions : Length, 17 ; breadth, 14 ; depth, 10 lines. 



ASTAETE MULTICOSTATA (NOBIS). FIG. 12. 



Shell sub-triangular, with a rounded base ; posterior margin, 

 gibbose ; anterior nearly straight ; umbo nearly in the middle of 

 the shell, thus differing from A elegans, which has it near the 

 posterior margin ; lines exceedingly numerous, but very dis- 

 tinct ; more than double the number of the former shell. 

 Proportions : Length, 21 lines ; breadth, 19 ; depth, 15. 



Occurs very rarely at Bradford Abbas, and also at Clatcombe. 



ASTAETE SPISSA (ivOBIs). FIG. 13. 



Shell sub-triangular ; gibbose, tumid, base rounded, lunule 

 large for the size of the shell, and heart shaped. Lines numerous, 

 but distinct, crenulations very sharp. 



Proportions : Length, 6 lines ; breadth, 5 ; depth, 4. 



This shell occurs somewhat commonly at Milborne Port in the 

 White Oolite, but I have not found it at Bradford Abbas. 



ASTAETE SUBQUADEATA. FIG. 14. 



Shell somewhat quadrate, posterior margin nearly straight and 

 inclined outwards, upper margin incurved, anterior somewhat 

 truncate, base flattened, lunule very small and narrow, costrc 

 numerous and distinct. 



Proportions : Length, 9 lines ; breadth, 8 ; depth, 5. 

 * Sow, Min, Conch, vol. ii, page 86. 



