THE NAUTILUS. 59 



Described by Thos. Say in Journ. Ac. Nat. Sc. Phila. 11, 270, 

 1822. It is frequently taken from the stomachs of fishes. Its habitat 

 is soft mud below low water, but it has been cellected on the shore 

 at Martha's Vinyard. Distribution, from South Carolina to Gulf 

 of St. Lawrence. It is very abundant in our bay, in mud, oft' Rum- 

 stick, near the mouth of "Warren River, where every throw of the 

 dredge will bring up hundreds of specimens. 



Genus Leda, Schum., 1817. 



This genus contains eighty species, four of which inhabit New 

 England and farther north. I am not aware that any species of 

 the genus inhabits R. I. although Prof. Verrill says in speaking of 

 Leda tenuisulcata, Stimpson, it inhabits from R. I. to Gulf of St, 

 Lawrence. 



Genus Yoldia, Moller, 1832. 



Five species of these peculiar shaped and highly polished shells 

 inhabit New Eng. one of which is found not living, but in a semi- 

 fossilized condition in Maine. 



{To he continued.) 



GENERAL NOTES. 



Haliotis rufescens, Sioains. In the last number of the Manual 

 of Cqnehology Mr. Pilsbry gives the range of Haliotis rufescens, 

 Swainson, " From Mendocino Co. to San Nicholas Island California." 

 In 1874 or 1875 I collected several very fine living specimens, at ex. 

 treme low tide on rocks near the mouth of San Tomas River, Lower 

 California. This extends it range fully two hundred miles south of 

 San Nicholas Island. I may also add, that Haliotis cracherodii, 

 Leach, ranges two or three hundred miles south of San Tomas 

 River. — Henry Hemphill, Saji Diego, Cal. 



Helix h.emastoma var. concolor. Among the hundreds of 

 specimens of the hcemastoma which I have seen, I never found one 



