LOCALLY INTRODUCED SPECIES. 471 



It is a European species, accidentally introduced into this country, or 

 rather by commerce as an article of food. It evidently is a species 

 peculiarly adapted to colonization. 



Jaw and lingual membrane : see above. 



Genitalia figured by Schmidt (Geschlechts. der Styl., Plate I, Fig. 5). 

 The genital bladder is small, globular, on a long duct, which has at 

 about the middle of its length a much longer and stouter accessory 

 duct. The penis sac is long, cylindrical, greatly swollen at its junction 

 with the vagina ; the retractor muscle is inserted above this swelling, 

 the vas deferens enters at the apex, beyond which is an excessively 

 long, thread-like flagellum. Opposite the entrance to the penis sac is 

 a very long, stout dart sac, above which are two bundles of numerous^ 

 short, closely packed, multifid vesicles. 



EXTRALIMITAL SPECIES OF POMATIA. 



Pomatia Buffoniana, Pfelffer, a Mexican species, has been erroneously quoted from 

 Alameda County, California. It is figured on Plate LXIII of Vol. Ill, Terr. 

 Moll. U. S 



