52 



the lower ; the regular oval i'orin rather pointed at the 

 beak end is characteristic, and «listinguishcs it constantly 

 from T. biplicata a ^tab. 90.) of which three views are 

 given in tab. 437 figs. 2 and 3 for comparison. 



Fig. 2 is a young shell, it is rather shorter, as usual, 

 than the full grown one fig. 3. They are from Dundry, 

 by favour of G. W. Braikenridge, Esq. 



TEREBKATULA maxilata. 



TAB. CCCCXXXVI.— /o. 4. 



Spec. Char. Subquadrangular, convex ; two 

 acute rising sinuses in the front, and one 

 obtuse sinus on each side ; three conspicuous 

 furrows in the upper, and two in the lower 

 valve; front rounded. 



fY ELL distinguished from T. intermedia t. 15. by the 

 depth of the sinuses, and consequent furrows which ex- 

 tend at least half way to the beak ; in some specimens 

 the two central ridges between the furrows are very 

 prominent, and approach more nearly together than in 

 the specimen figured, such shells are also generally 

 longer shaped; it is always smaller than theT. intermedia. 

 A front view of the sharply sinuated edge, reminds us 

 of the closed jaws of a carnivorous animal, whence the 

 epecific name. 



Sent from Nunney by our good Friend the Rev. J. 

 Ireland ; the longer variety we have from Farley. 



