13 



same. He expressed himself to that effect iu letters to my father. From Dr. 

 GriflBth, Prof. Adams may have received the same impression (see Vt. Moll.) I 

 am inclined to differ from them, believing the species, though nearly allied, to be 

 quite distinct. Until vfe receive the true R. fuliginosa from the South-western 

 States, I shall doubt its existence there. Our country has been too little 

 searched, however, to allow us to draw very nicely the lines of geographical 

 distribution. If I am correct in my view of this species, Mr. Say's name will, of 

 course, take precedence over that of Dr. Pfeiffer. 



Helix clausa. The specimens are much more globose than that figured in 

 Am. Conch. The aperture is quite orbicular. 



Helix appressa, hiksuta, inflecta, profunda, aoriculata, ligera, solitakia- 

 3dppressa. 



H. FATiGiATA, as fig. in Terr. Moll, iii. pi. xxxix, f. 4. 



H. PLiCATA. Like Troostiana, Lea. 



H. PALLAX. The upper denticle on the peristome placed within the aperture, 

 like that of II. vuUuosa, Gould, 



H. SEPTEMVOLVA. Large and small var. o{ cereolus, Mhtl. 



SucciNEA AVARA, CAMPESTRis. Same as figured in Terr. MoU, 



Helicina orbiculata, OCCULTA, (fossil.) 



Pupa pentodon, corticaria, armigera. 



Achatina solida. More elongated than that fig. in Terr. Moll. 



1857.] 



