THE NAUTILUS. 107 



We Lave not seen this species. 



37. E. arata Conrad. Eocene. Claiborne, Ala. (See Foss. Tert. 



Form. p. 44.) 

 A magnificent species, having some characters of Subemargin- 

 ula. 



Subgenus Rimula Defrance, 1827. 



38. R.frenulata'DaW. W. Fla. and Keys. 



Genus 8. Subemarginula Blaiuv., 1825. 



39. S. odoradiata Gmel. Tortugas. 



40. S. Rollandii Fischer. S. Fla. 



41. S. emarginata Blainv. Florida Keys. 



* , He 



42. Cemoria crucuh%diformis Conrad. Miocene of Cal. 



We have not been able to find this species among Conrad's 

 types. Its generic position is of course doubtful. 



43. Cemoria oblonga H. C. Lea. Miocene. Petersburg, Va. 



Type in Coll. A. N. S. P. (See Trans. Amer. Philos. Soc. 

 1843, p. 247, pi. 35, f. 37.) 

 AVe would consider this tiny shell a Rimula were it not that 

 there is no anal fasciole extending from fissure to apex, and 

 for the callus around the hole inside. These features cause 

 us to believe it a very young Fissuridea (" Glyphis"), prob- 

 ably F. alticostata Conrad. 

 The authors will be glad to have any criticisms on this list, and 



also any extensions of the geographic or geologic range of the 



species. 



GENERAL NOTES. 



Food of Snails. Have kept since last May a dozen Helix albo- 

 labris in confinement. Have fed them 53 species of plants of which 

 number they have refused to eat but five species, as follows : Achil- 

 Icea millefolium L.. Brunella vulgaris L., Vernonia nave boracensis 

 Willd., Xanthium Canadense Will, and a species of Euphorbia. 

 They generally prefer the tenderest plants but refuse some that are 

 tender and eat of others that are hard and stringy. They refuse the 

 stalk and leaves of young growing maize but dig down and eat the 

 germinating kernels. I kept them in a box with soil in the bottom 

 and wire on the top. The corn was planted in the soil and grew to 



