PACIFIC COAST SPECIES. 149 



descending, globose; aperture oblique, banded witliiu 5 peristome 

 thickened, brownish, shining, its inner margin rounded, re- fig. 131. 

 fleeted, the columeUar portion dihited, appressed, partially, *"^ ^"j 

 or entirely covering the umbilicus. Greater diameter 14, " 'J 



lesser 12""" ; height, 8'"'". 7"^^^. 



Santa Barbara Island, California. On this and San Nicolas Island 

 is found a larger, heavier, extinct variety. South end of Catalina 

 Island. 



The species has the stout, white, parchment like epiphragm charac- 

 teristic Qi Arionta. 



Jaw arcuate, of equal breadth through out ; anterior surface with 

 distant, stout ribs, deuticulating either margin. 



Lingual membrane long and narrow (Terr. Moll., V, Plate IX, Fig. 

 P). Teeth 2G-1-2G, as usual in Arionfa. IMorse counted 114 rows 

 of 29-1-20. The fourth has a decided side cusp and cutting point, 

 which on the central and first three laterals were replaced by a prom- 

 inent bulging of the large cutting point. The thirteenth tooth has its 

 inner cutting ])oint bifid. My figures give the central, with the first, 

 fourth, twelfth, thirteenth, seventeenth, and twenty-sixth teeth, the last 

 two being marginals. 



Genitalia (Plate XVIII, Fig. 9 of Ann. Lye. Nat. His. of N. Y., XI) 

 without the accessory duct of the genital bladder, and with a dart sac. 

 They resemble nearly those of ruficincfa (see above), differing chiefly 

 in the length of the duct of the genital bladder. At the base of the 

 dart sac there ai)pear two simple, thread-like organs, reminding me 

 of those of Stearnsia7ia, but without their terminal complications. I 

 have not figured them, being uncertain whether they should be consid- 

 ered as a part of the genital system. They may be the same as figured 

 on Plate XY, Fig. O, of Terr. Moll., Y, or the individual furnishing the 

 genitalia there figured may thus show the near relation of facta to rufi- 

 cincta. 



Ai'ionta Kellotti, Forbes. 



Shell narrowly umbilicated, depressed-globose, thin, wrinkled, gran- 

 ulated, fulvous; spire subturbinated, with dirty red- * no. 132. 

 dish blotches and one red revolving band ; whorls 

 0, rather convex, the last with a white band at its 

 periphery and inflated on its under surface ; aper- 

 ture roundly lunate, light red and banded within; 

 peristome somewhat reflected, its columellar portion ^_ KeiiettL 



