PACIFIC COAST SPECIES. 79 



Maine, Vermont, and New York, in tlie Central Province, in Nevada 

 and Colorado. Its range in Europe is very great, being found from 

 Siberia to Sicily, England, Iceland, &c. 



The shell is often met with an edentulate aperture. Such is the speci- 

 men figured in the second edition of Chemnitz. 



Jaw of American specimen sliglitly arched, concave edge waving, 

 anterior surface striate. (See below, under family Pupidcv.) 



P. muscorum has 90 rows of 14-1-14 teeth, with 6 perfect laterals on 

 its lingual membrane. (See Morse.) Tlie figure and description of Leh- 

 mann of the European P. muscorum confirm my belief in the identity of 

 the two forms. 



b. Species of the Pacific Province. (See p. 19.) 



It must be borne in mind that the universally distributed species 

 are also found in this province. 



Family SELENITID^. 



MACROCYCLIS, Beck. 



Animal heliciform ; mantle posterior, covered with a shell ; eye- 

 peduncles long, slender; foot narrow, twice as long as the diameter 

 of the shell, tail X'ointed, scarcely reaching be- fig. 4i. 



hind the shell; respiratory and anal orifices /-^^^^T'X 

 on the right of the mantle, under the peii- ¥ -^ - J> 



stome of the shell ; generative orifice behind .4^_^_^. 'S""" 



the right eye-peduncle; no distinct locomotive Aniwai of j/acrocj/dig concara. 

 disk or caudal mucus pore. Carnivorous. 



Shell thin, widely umbilicated, depressed, striate or wrinkled, color 

 uniform; Avliorls 4^-5, the last broad, depressed, moderately deflexed 

 in front; aperture obliquely ovate ; peristome somewhat thickened or 

 expanded, the margins approximating, the basal shortly reflexed. 



A few species of this genus have been found in Chili and the West 

 Indies. It seems, however, to reach its greatest development in our 

 Pacific Province. 



Jaw crescentic, ends sharply pointed, anterior surface striated; cut- 



. ting margin smooth, with a median projection. I have examined the 



jaw of M. Vancouveremis (Fig. 42), sportellciy concava, 



Hemphilli, Duranti, Voyana, and in the West Indian 



species, M. Baudoni, Petit, and M. euspira, Pfr. 'J7w oTjJ^^^ 



The general arrangement of the lingual membrane of ^^««^«"''«««*^- 

 MacrocycUs is the same as I have described for Glandina. 



