62 PALEONTOLOGY OF .NEW JERSEY. 



smaller and deeper than in the left valve. The muscular imprints are pro- 

 portionally large, narrow, and elongated, much resembling those of Lucina; 

 the posterior imprint being also the largest 



The two valves from which the above features are taken appear to 

 belong together, although they were separated when they came into my 

 hands, and the right one only in fragments, with parts missing. The hinge 

 portions, however, are present, although fractured. As they fit each other, 

 the features as given from them may be considered as reliable for the species. 



Locality: Mr. Conrad's type specimen, which is the largest, is labeled 

 in his own handwriting as "Shiloh, N. J.," and is from the cabinet of the 

 Academy of Natural Sciences, Philadelphia. The others are from Bridge- 

 ton, N. J., near Shiloh, and belong to the National Museum at Wash- 

 ington, D. C. 



Family I.UCINIDJE. 

 Genus LUCINA Drug. 



Lucina acclinis! 



Plate x, tigs. 5 and 0. 



Lucina acclinis Conrad; Foss. Tert. Form. K. A., p. 21, PI. vi, fig. 2. 

 Mysia Americana Conrad; (not Defr.) Miocene Foss., p. 30, PL xvi, fig. 2. 

 Lucina Americana Conrad; (not Defr.) D'Orb., Prod., vol. 3, p. 117, No. 2191. 

 Mysia acclinis Conrad; Proc. Acad. Nat. Sci., Phil., 1862, p. 577. Meek, Check List, 

 p. 8. 



Mr. Conrad describes his Mysia Americana in Miocene Fossils, p. 30, 

 as follows: " Shell suborbicular or lentiform, a little oblique, with strong 

 lines of growth; hinge with two diverging teeth in each valve; posterior 

 tooth of the right valve bifid; anterior muscular impression not profoundly 

 elongated." 



I have seen only one fragment, about half of a left valve, of the shell 

 which I suppose to be identical with this species; but I can feel little hesita- 

 tion about its identification. The only point of difference between it and 

 Mr. Conrad's figure, is the lack of a posterior sulcus in the figure, while 

 there is a faintly marked sulcus on the specimen. The hinge plate, as far 

 as seen, corresponds, as do all the features which are visible on the speci- 



