570 



If the larger fort is di{lin£l, it appears equally plenti- 

 ful with the other, for we have obferved in many places, 

 this is the fort principally eaten, the fmaller ones being 

 reje^ed as young, and left to grow larger; and we mutl 

 confefs, that the great variety now before us, run fo much 

 into each other, as to render it impoffible to divide them, 

 although the two cxtrcm<;s appear different. 



X.ACUSTRE. The animal of this fiiell, as well as its congenera cor- 



n. 89. neiim and amnicum, is certainly an Afcidia, not a 71,'- 



thys as was dated by miftake. 



MACTRA. 



"SuBTRUNCATA. Ma£tra fubtruncata. Don. Br. SheJh. \v. t. 126. 



p. 93. 



SruLTORUM. Ma£lra flultorum. Don. Br. ShelJs. iii. t. lOG. ' 



p. 94. 



Compress A. Tellina plana. Do7i. Br. Shells, ii. t. 61. 



P* ^■^' By millake we have referred to this fliell of Dono- 



van, iinder the title' of Tellina borcalis, inftead oi plana. 



Maftra 



