124 ORCULA. 



this connection is not clear to me ; but I presume that morplia 

 is applied to populations having characters not thought to be 

 of racial significance, but denoting changes presumably re- 

 sulting from environmental influence, such as are correlated 

 with elevation, aridity and the like. In Zimmermann's 

 descriptive text the names of both forms and morphs are 

 written as trinomials, as in the abstract following the table. 



Orcula dolium Drap. morpha dolimn, s. str. 



morpha infima, n. m. 



morpha edita, n. m. 



morpha oreina, n. m. 



forma pseudogidaris A. J. W. 



forma gracilior, n. f. 



Orcula dolium Drap. intermediate with gularis Rssm. 

 (0. gularis pseudodolium A. J. Wagner) 



Orcula gularis Rssm. subsp. gularis Rssm. 



morpha gidaris s. str. 

 ** ** " " morpha oreina, n. m. 



" " " " restituta West. 



Orcula dolium intermediate with tolminensis A. J. Wagn. 



Orcula tolminensis A. J. Wagner. 



Orcula spoliata Rssm. subsp. spoliata Rssm. 

 " " " AUSTRIACA, n. subsp. 



morpha austriaca s. str. 

 morpha oreina, n. m. 



Orcula fuchsi St. Zim. 



Orcula conica Rssm. forma conica s. str. 



*' " forma minor, n. f. 



Orcula dolium DOLIUM (Drap.). Text-figs. 1-6. 



The fundamental form has as a rule two equally strong and 

 nearly equally emerging columellar lamellae. Among them 

 there are almost always single examples with the upper 

 lamella somewhat weaker. A third, middle columellar lamella, 

 somewhat weaker (aberration triplicata) occurs not rarely 

 as a purely individual hyperplasy, almost entirely in large 



