1G6 TELLINA. TELLEN. 



and sinuous, thickened outwardly by a border ; inner-lip 

 smooth, with a slight canal : length hardly half an inch ; 

 breadth a third of its length. 



Variety. Without the raised spiral line at the bottom 

 of the volutions. 



Strombus turboformis. Montagu, pi. 30. f. 7- 



Mr. Dillwyn remarks that the Str. costatus, a very rare 

 and local species, is plentiful in Eantry bay. We have re- 

 sided there for a week together, for the sole purpose of ex- 

 amining the heaps which are dredged up for manure, and 

 have never been so fortunate, nor have any of our concho- 

 logical friends, as to find a single specimen. It is probable 

 that he mistook for it the Murex reticulatus, the most com- 

 mon of the shells among those heaps ; and the more so, 

 as at the time he made his visit to that part of Ireland, he 

 confessedly paid little attention to this department of na- 

 tural history. 



On the Western and Scotch coasts : rare. v. m. 



TELLINA. TELLEN. 



Shell with two valves, generally sloping or 

 curved to one side at the anterior end : hinge with 

 usually three primary teeth, and the lateral teeth 

 in one of the valves obsolete, 



A. Oval and convex, 1 to 4. 



B. Oval and flat, 5 to 15. 



C. More or less orbicular, 16 to 32. 



1. Tellinafragilis. Brittle Tdlen. Fig. 18. 



Lister, pi. 390. f. 229. 



Tellina jugosa. Brown, Wevn. Soc. pi. 24. f. 2. 



Shell extremely thin and brittle, rounded and tumid at 

 one end, and produced to a rough rounded point at the 

 other, where it is something angular and a little gaping ; 

 valves equal, with numerous rather unequal extremely thin 

 elevated transverse ridges, which become stronger and re-' 

 curved towards the ends, with the interstices very faintly 

 striate both transversely and longitudinally : color white, 



with 



