11 



ANCYLUS PARALLELUS, Hald. 



PLATE 1. FIG. 6. 



A. testa elongate, angusta, depressa, diaphana, apice 

 subacuto. 



SYNONYMS AND REFERENCES. 



A. PARALLELUS. This work; January, 1841. 

 " ADAMS. Hist, of Vermont. 



A. RIVULARIS, GOULD. Invert, of Mass., p. 224. 



DESCRIPTION. 



SHELL pale, thin, and delicate; lengthened, 

 sides subrectilinear, diverging slightly forwards: 

 apex rather sharp, conspicuous, with two-fifths 

 of the shell posterior to it. 



DIMENSIONS. Long. 0.25, lat. 0.15, elev. 0.08 

 inch. Adams. 



GEOGRAPHICAL DISTRIBUTION. Inhabits New 

 England. 



OBSERVATIONS. 



In general appearance, resembles Velletia 

 lacustris, Miill., of Europe, but is at once 

 distinguishable by having the apex directed 



