OP OONCHOLOGY. 373 



H. Febigeri, nov. sp. — Plate 21, fig. 10. 



T. umbilicata, orbiculato-plana, tenuis, nitida pallide vel 

 rufo-cornea, superne subdistanter costulato-striata, subtus sub- 

 striata ; spira planata ; sutura profunda ; anfr. 5 J-6, convexi- 

 usculi, regulariter accrescentes, ultimus ad peripheriam angu- 

 latus, infra angulum in flatus; umbilicus infundibuliformis ; 

 apertura obliqua, subreniformis ; perist. incrassatum, breviter 

 reflexum, sinuosum, rnarginibus callo valido triangulari junctis. 



Shell umbilicate, orbicular, flat, thin, shining, pale or reddish 

 horn-colored, with rather distant rib-like strias above, finely 

 striated beneath; spire almost level; suture deep; whorls 

 5|-6, rather convex, regularly increasing, the last angular at 

 the periphery, inflated below; umbilicus funnel-shaped; aper- 

 ture oblique, kidney-shaped ; peristome thickened, little re- 

 flected, the margins joined by a strong triangular callus. 



Dimensions. — Diam. maj. 8|, min. 7|, alt. 3J mill. A small 

 specimen measures: Diam. maj. 7|, min. 6 J, alt. 8 mill. 



Habitat. — New Orleans, (Major G. L Febiger, U. S. A.!) 



Remarks. — This species certainly differs from H. cereolus, 

 Muhl., H. septemvolva, Say, H. volvoxis, Parr., and H. Carpen- 

 teriana, Bid., the four species of the same group hitherto found 

 on the North American Continent. 



Compared with II. paludosa, Pfr., of Cuba, the rib-like striae 

 are more regular and prominent, it is more decidedly angular 

 at the periphery, and the form and armature of the aperture 

 are different. In H. Febigeri there is no such excavation be- 

 low the angle of the periphery as prevails, more or less, in the 

 other above-named continental species. In this respect, and 

 in the form of the aperture, H. Febigeri appears to be most 

 nearly allied to H. microdonta, Desh., of Bermuda and New 

 Providence, but it is more coarsely striated, and the last whorl 

 is more inflated below. 



I am indebted for specimens of H. Febigeri to Mr. Isaac 

 Lea, who sent them, believing the species to be new. Many 

 examples were collected and forwarded to Mr. Lea by his 

 nephew, Major Febiger, who has long been interested in the 

 land shells of the United States, and to whom I dedicate the 

 species. 



Succinea Higginsi, nov. sp. — Plate 17, fig. 21. 



T. depresso-ovata, tenuis, oblique striata, pellucida, nitidula, 

 pallide cornea ; spira brevis, obtusa ; sutura profunda ; anfr. 

 3, convexi, ultimus depressiusculus; columella vix arcuata, 

 superne conspicue plicata; apertura angulato ovalis, dente 

 parvo, obliquo, albo, in pariete aperturali saspe armata ; perist 

 simplex, regulariter arcuatum. 



