22 PKOCEEDINGS OF THE ACADEMY OF [1894. 



raens collected many years ago as well as by others taken during the 

 past year; and no other forms or species have to my knowledge l)een 

 found anywhere near Philadelphia. 



The conclusion that one of these three is the faUax of Say is there- 

 fore an extremely probable one. Upon turning to Say's original 

 deserii)tion fjourn. Acad. Nat. Sci., V, p. 119) we find that it ap- 

 |)lies exactly to the shell known as Helix vtfroferens Bid. Say men- 

 tions the parietal tooth "curving downwards so as to nearly reach the 

 termination of the labrum" and says : "This resembles the trideii- 

 tdt I nob., but the upper tooth of the labrum is much inflected, the 

 spire is more elevated, and the size is less considerable. ' ' He gives the 

 diameter as " nine- twentieths of an inch," which is exactly the size 

 of the Philadelphia " introferetts." It should l)e added that Say's 

 types of frideidiiti and f(dla.c are no longer in existence. In view of 

 the facts of the case, it seems to me necessary to use Say's mime fal- 

 Ik.v for the species hitherto called liitroferens, the latter becoming a 

 synonym. 



The prominent features of this shell, besides its elevated spire and 

 and inflected upper tooth, are the angular curvature of the parietal 

 tooth, and the continuation inward of the basal tooth and the callus 

 around the "'profound sinus" between the two lip-teeth. 



Genus STROBILOPS Pilsbry. 

 S. virgo Pilsbry. 



Near Monterey, Adams Co. , Pa., ()<S,8o5. 



Family PHILOMYCIDiE. 

 Genus PHILOMYCUS (Raf.) Fer. 

 P. carolinensis (Bosc. ) Fer. 



Southeastern sl()j)e of North iMouiitniu mid ('uinlHTland, ^Id. ; 

 Monterey, Pa. Stone collected it al YoiL I'^inuicc, York Co., Pa. 

 Also seen at Fairview, summit of Nortli Mountain, Md. 



P. pennsylvanicus rilsl)r.y, ii. sp. 



A maculated species having the jaw strongly ril)])C(l. It is 

 smaller and less distinctly marked than P. c.n<diiu:iisis. Full des- 

 cription with anatomical details will be given later. 



York Furnace, York Co., Pa. (Witmer Stone!). South Moun- 

 tain, near Pa. and Md. State boundarv. 



