

,162 NEW UNIONID^, MELANID^, ETC., 



first I thought it might be bulimoides, (nobis,) but it is nearer perhaps to exigua and 

 plica, (nobis). It diiFers from bulimoides in being more elongate, and in being whiter 

 and thinner ; from exigua in beirig larger, having striaa and a large body whorl, as 

 well as having a more inflated aperture ; from 2Mca, in being larger, having a more 

 expanded aperture and a very much less fold in the columella, which is remarkable 

 in plica. All the specimens before me have numerous very close perpendicular 

 strise. The aperture is a little more than half the length of the shell. I have 

 pleasure in naming this species after my friend Mr. James, who seems first to have 

 observed it. 



Ltmn^a Tryoniana. pi. 24, fig. 78. 



Testa subfusiformi, tenui, dilute fusca, subdiaphana, parum perforata, minutissime striata, nitida; spira 

 conoidea ; suturis impressis ; anfractibus quinis, convexiusculis ; apertura pajviuscula, ovata, sub- 

 marginem fusca ; labro subexpanso ; columella inerassata et plicata. 



Shell subfusiform, thin, light brown, semi-transparent, slightly umbilicate, very 

 minutely striate, shining; spire conoidal; sutures impressed; whorls five, somewhat 

 convex ; aperture rather small, ovate, brown within the margin ; outer lip somewhat 

 expanded ; columella thickened and plicate. 



L. Trasldi* Proc. Acad. Nat. Sci., 1864, p. 113. 



Eab. — San Antonio, Arroya, John B. Trask, M. D. 



My cabinet and cabinet of Dr. Trask. 

 Diam. -25, " Length -55 inch. 



Remarks. — This pretty little species has been in my possession some years. I 

 supposed it might be ixdlidce, Adams, but that shell has a larger aperture, a more 

 expanded lip, and is more inflated. On comparison with the description and figure 

 of Mr. Adams in the 3d volume of the Journal of the Boston Society of Natural 

 History, the difference may at once be observed. The aperture is rather less than 

 one-half the length of the shell. It is also allied to umbilicata, Adams. I have a 

 single imperfect specimen in my cabinet, simply marked as coming from " Ohio," 

 but I am not positively sure that it is correct. I am indebted to Dr. Trask for this 

 and many other interesting species of Mollusca from California. 



LymNjEA Lecontii. pi. 24, fig. 79. 



Testa inflata, suberassa, perforata, excellissime transverse striata ; spira obtusa ; suturis valde impressis ; 

 anfractibus valde convexis ; apertura subrotunda, grandiuscula ; labro expanse ; columella medio 

 inerassata et impressa. 



Shell inflated, somewhat thick, umbilicate, minutely and transversely striate; 

 * The name of Traskii being pre-occupied by Mr. Tryon, I substitute that of Mr. Tryon. 



