SUCCINEA 



Shell ovate, or ovately conical, in general rather elon- 

 gated, with a very large, entire, longitudinal aperture, in 

 general about two thirds the length of the shell. Edge of 

 the outer lip sharp, not thickened nor reflected, uniting 

 itself at its lower part to the smooth, sharp-edged, narrow, 

 attenuated columella. Inner lip spread over a small part 

 of the lower and inner side of the last volution. 



Lamarck describes three recent species of this Genus, 

 and we are not disposed to question the propriety of 

 uniting them together in one Genus, though later authors 

 appear to wish to separate the Bulhnus patulus of Bru- 

 guiere, adopting the generic appellation of AmphibuUma 

 for it. De Ferussac, who notices nine species, unites them 

 under the appellation of Helix Cochlohj/dra, not thinking 

 it sufficiently different from Helix to be separated from it 

 as a distinct Genus. We have represented three species. 



Fig. 1. Succinea cucuUata, Lam. Hist. Nat. des Anim. sans vert, vi, part if, 

 p. 134. Helix Cochlohydra patula, De Ferussac Hist, des Mol- 

 lusques, t. xi. f. 14 to 16. Of this we have given three views, in 

 order to show the shortness of the spire, and the magnitude and 

 obliquity of the aperture; which is, indeed, its peculiar character, 

 and upon which some writers would also found the characters of a 

 distinct genus. 



2. Two views of a new species which we have lately received from 



Brazil, and which we propose to designate by the name of S. ovata. 

 We at first hesitated upon the propriety of admitting it into this 

 genus; but as we find, upon examination, all the characters of 

 Succinea, its claim to a place here can be no longer questioned. 

 "We add a specific character, because we do not find the species 

 mentioned any where. Succinea ovata; testa ovata, cornea, lon- 

 gitudinaliter striata, spira brevissima; anfractibus tribus, convexi- 

 usculis; apertura ovata, obliqua. 



Length to the breadth, as 2 to 3. 



3. Two views of S. amphibia, Drap. Bulimus sitccincuSf Brug, Helix pu- 



tris, Linn. Sec a common English species. 



A few other recent species are known, of which the- 

 S. oblonga is found in several parts of Europe, and some 

 others are inhabitants of warm climates. We have never 

 seen nor heard of any fossil species of this Genus. 



