Shells found in Essex County. 75 



MODIOLA DISCREPANS. Montague, 



A small, thin, delicate shell, with twelve or more crenated 

 elevated lines on the posterior part of the valves, an elevated 

 single line passing from the apex of the shell obliquely to base 

 of valve ; and otherwise minutely striated with a pale yellow- 

 ish epidermis, and white perlaceous within ; pretty. 



Lynn and Nahant. 



My Cabinet and Cabinet of Society. 



Gould's Report and Catalogue, 1838. 



THRACIA CONRADII. 



Single valves of this shell are found on Lynn beaches. 

 Cabinet of Dr, Prescott and of the Society. 



BULLA TRITICEA. Latin, wheat, (like a grain of wheat.) 



A very delicate, small, native species, found occasionally on 

 our beaches. Shell cylindric, covered with brownish or rusty 

 epidermis, and longitudinally and transversely striated ; colum- 

 ella white, and reflected on the body of the shell. 



Lynn beaches. 



Described by Couthouy, in Boston Journ. Nat, Hist., vol. ii., 

 p. 88, pi. ii., fig. 8, 



Presented to the Society's Cabinet, by Dr. Prescott. 



SCALARIA. Latin, a stair case. 

 SUBULATA. Couth. Latin, awl shaped. 

 Awl shaped wentle trap or stair case shell. 

 A beautiful little native species of this fine genus so well 

 known to collectors. Shell tapering to a sharp point ; whorls 

 nine ; longitudinal ribs ten on the body whorl ; pure white and 

 deflected a little from the base of the ribs on the next whorl. 

 Color brownish between the ribs and transversely striated. 



Described in Boston Journ. Nat. Hist., vol. ii., p, 94, pi. iii., 

 fig. 4. 



Lynn beaches. 

 Cabinet of Dr. Prescott and of the Society. 



