LYMN^EID^E OF NORTH AMERICA. 213 



Remarks : Bulimoidcs may be distinguished from techella and 

 other races by its more regularly ovate shape, less globose body-whorl, 

 more elongate-ovate aperture and by the different manner in which the 

 inner lip is oppressed to the columella}' region. There is considerable 

 variation in the rotundity of the whorls and in the length and acuteness 

 of the spire. The inner lip also varies greatly, in some specimens being 

 rolled or folded over into the umbilical region while in others it is 

 expanded, approaching the techella form. Bulimoidcs somewhat re- 

 sembles cubensis, differing in its nearly closed umbilical chink, folded 

 inner lip, shorter and broader spire and its ovate shell. The whorls of 

 cubensis are also rounder and more distinctly shouldered than are 

 those of bulimoidcs . 



Judging by Lea's types of bulimoidcs, most authors have confused 

 this species with techella and cockerclli. The figure in Binney is not 

 good, representing, probably, cockerclli. Haldeman's figures are good 

 and fairly represent the species. The types in the Lea collection at 

 Washington are rather small, long and narrow, regularly ovate-conic 

 with a flat sided body whorl and with the inner lip reflected and ap- 

 pressed to the umbilical region, leaving a small chink. Of the seven 

 type specimens three are apparently nearly full grown and four are 

 immature. 



In mapping the distribution of the typical form, great difficulty 

 has been experienced in harmonizing some of the literature. In ref- 

 erences from the southwestern states it is impossible to know whether 

 true bulimoidcs or some of its varieties is intended. Call's record in 

 Bull. Wash. Coll. Lab. N. H., I, p. 118, is very doubtful, especially in 

 view of his reference to Binney's figure 86, which does not represent 

 bulimoidcs. Only ah examination of the specimens will settle the 

 status of these doubtful records. Bulimoidcs is reported by DeCamp 

 from Michigan "greenhouses, probably introduced on plants" (Walk- 

 er, Nautilus, VI, p. 34). One of the type specimens of bulimoidcs is 

 figured on pi. XXVII, fig. 25. (No. 118647 Smith. Inst.) Compare 

 this figure with the figures in Binney and Tryon. 



In Dr. Pilsbry's excellent discussion of the techella group of 

 Lymnseas 1 typical 'bulimoidcs was not redefined although techella, 

 cockerclli and sonomcensis were made races of this species. The tri- 

 angular and rolled over form of the inner lip and the less rotund shape 

 of the body whorl will separate bulimoidcs from techella and cocker- 

 clli. Lymncea bryanti is a synonym of bulimoidcs; it was founded on 

 immature specimens. 



iProc. Phil. Acad., p. 162, 1906. 



