114 



can be no doubt of their being indigenous. They commit yearly 

 great ravages upon the shipping of Lynn and Marblehead. 



Dentalium striolatum. This species I obtained in great 

 numbers by dredging in from ten to sixty fathoms on muddy 

 bottoms at the mouth of the Bay of Fundy. It is that referred to 

 as D. entale by Dr. Mighels. Having had opportunities of com- 

 paring numerous specimens of the European species with ours, I 

 am convinced they are distinct. It differs from D. Tarentinum 

 in being larger, tapering more gradually to a point, in being 

 more rugose with the lines of growth, and in being almost always 

 destitute of longitudinal strise. 



The length of one specimen is an inch and one half; the dia- 

 meter at the aperture .175. Imperfect specimens indicate a 

 length of two inches. 



Chemnitzia dealbata. T. ovato-conica, alba, glabra, pellu- 

 cida, tenuis ; anfr. 6 convexiusculi's : apertura ovata, vix effusa, 

 plica parva, inconspicua munita. Long. .17; lat. .065 poll. 

 Hob. Boston Harbor. 



Chemnitzia nivea. T. aciculata, subcylindrica, alba, nitida; 

 anfr. 11, planatis, longitudinaliter plicatis, plicis rectis, interstitiis 

 h-Evissimis. Long. .28 ; lat. .04 poll. Hob. In forty fathoms, 

 off Grand Manan. 



Columbella dissimilis. T. parva, ovato-conica, solida, lon- 

 gitudinaliter substriata, fusca, ssepe albo trizonata; anfr. 5 plana- 

 tis, apertura dimidiam spiram subsequante. Long. .23; lat. .1 

 poll. Hah. In from four to forty fathoms, at the mouth of the 

 Bay of Fundy. 



Mr. Stimpson also read descriptions of several new spe- 

 cies of shells from the Southern coast ; by Lieut. J. D. Kurtz 

 and himself. 



RissoA PUPOIDEA. T. ovata, fusca, pellucida ; anfr. 5 con- 

 vexis, linea transversa, angusta, subnigra, subincrassata, postice 

 ad suturam cinctis : apertura ovata. Long. .072 ; lat. .047 poll. 

 Hah. South Carolina 5 on decaying wood at the edge of the 

 sea. 



