EASTERN PROVINCE INTERIOR REGION SPECIES. 331 



lieve that it is only a young shell. In the great number of specimens 

 which I possess the teeth are only rudimentary. 



Jaw slightly arcuate, tapering towards the pointed ends, the center 

 of the anterior surface marked with ^j^, ^^g 



longitudinal stride ; concave margin 

 with a slight, broad, median project- 

 ion. (Fig. 357.) 



Lingual membrane with 25 teeth 

 (12-1-12) in each row. Central teeth 

 very small, tricuspid; laterals bicus- ungual Amtuiuu of Pupa cvmcaria. 



pid, modified into serrated marginals. (Fig. 358.) 



Genitalia unobserved. 



DOUBTFUL AND SPURIOUS SPECIES OF PUPA. 



Pupa placida, Say, is probably an accidentally introduced specimen of Buliminus 

 oiscu)-us, Mui.LER (see Boston^Proc, i, 105). 



The original description here follows : 



Shell dextral, cylindricconic, pale-yello^visb horn-color; apex whitish, obtuse; 

 whorls 6i, somewhat wrinkled: suture moderately impressed; aperture unarmed, 

 longitudinally oval, truncate a little obliquely above by the penultimate volution; 

 columella so recurved as almost to conceal the umbilicus; labrum, with the excep- 

 tion of the superior portion, apxiearing a little recurved when A'iewed in front, but 

 when viewed in profile this recurvature is hardly perceptible; umbilicus very nar- 

 row. Length over three-tenths of an inch. Inhabits Massachusetts. For this shell 

 I am indebted to Dr. T. W. Harris, of Milton, from whom I have received many 

 interesting species of our more northern regions. At first view it might be mis- 

 taken for the P. vxarginaia, Nob., but it is quadruple the size, and the labrum is not 

 reflected and thickened. (Say.) 

 Pupa placida, Say, New Harmony Diss., ii, 230 (1829); Descr.,24 (1840); Binney's 



ed., 39.— W. G. Binney, Terr. Moll., iv, 145. 

 Pupafallax, De Kay, N. Y. Moll., 51.— Gould, Invert., 192. 

 Pvpa fallax, (i, Pfkiffer, Mon. Hel. Viv., ii,309. 

 BuUmus hordeannsf De Kay, 1. c— Binney, Bost. Proc, i, 105. 



Bulimus ohscurus, Gould, Mon. Pupa, 17.— Pfeiffer, iii, 350, on De Kay's au- 

 thority. 

 Pupa costulata, Mighels, is the same as Acantliinula harpa. 



Pupa exigua, Say, &.c., is the same as Carychium exiguiim. (See Terr. Moll., iv.) 

 Pupa Gouldii, Binney, &c., is the same as Vertigo Gouldi. 

 Pupa milium, GouLD, is the same as Vertigo milium. 

 Pupa modesta, Say, &c.,is the same as Vertigo orata. 

 Pupa ovata, Gould, &c., is the same as Vertigo orata. 

 Pupa ovulum, Pfeiffer, is the same as Vertigo ovata. 

 Pupa simplex, Gould, &c., is the same as Vertigo simplex. 

 Pupa incana = Stro2)]iia. 



Pupa unicarinata, Binney, Terr. Moll., i, is the same as Macroceramus Kieneri. 

 Pupa Nehrascaiia, of Warren's Report of Surveys, &c., Ex. Doc, ii, pt. 2, 35th Cong., 



1859, 725, may perhaps be /'. contracta. 

 P. marginata, Drap., credited to North America by Prestwich, Quart. Journ. Geol. 

 Soc, xxvii, 493. 



