AN INTRODUCED SNAIL. 151 



slightly elevated, the whorls five in number, and the 

 umbilicus of moderate size. Diameter one-fourth of 

 an inch. It is a European species, but has been 

 widely distributed by commerce. Specimens were 

 kindly sent me from Portland, Oregon, by Mr. Harry 

 E. Dore. 



Zonites milium, Morse, mil'-i-um, is an extremely 

 small snail, not larger than the head of a pin. 

 Whorls three, umbilicus large, shell conical, whitish, 

 marked by cross striae; lip sharp and thin. This 

 minute shell is found throughout a large part of the 

 United States. The specimens before me are from 

 San Diego. 



Do not be weary, kind reader, of the seeming repe- 

 tition of characteristics, but rather rejoice in the 

 almost endless variety of living things which the 

 Creator has placed upon this earth, each one display- 

 ing some new peculiarity, and no one, doubtless, 

 made in vain. 



Macrocyclis Duranti, Newc. , Mak-ro-si'-klis Du- 

 rant'-i. Shell consisting of a small, flattened coil; 

 whorls four, umbilicus large and open; color dull or 

 greenish white, diameter one-fourth of an inch or 

 less. This species is found in Lower California, on 

 several islands, and also near the cities of San Fran- 

 cisco and Iyos Angeles. 



Fig. 133 represents the shell of Macrocyclis Voyana, 

 Newc, Voy-an'-a. It is similar in shape and color 

 to that of the last, but is larger. Aperture 

 flattened, notched near the suture; diameter 

 about half an inch. This species inhabits 

 the coast region of California. 



Macrocyclis sportella, Gld., spor-tel'-la. 

 Spire of five whorls, flattened, similar in general 



