201 



Nerita articulata. T. oblique semi-globosa, postice planulata, 

 antice dilatata ; spira prominula, anfr. 3, liris prominulis atro-pur- 

 pureis albo-articulatis 25-38 cinctis, interspatiis latioribus lucidis car- 

 neolis decussatim striatis : apertura magna, semilunaris ; labro acuto 

 atropurpureo, callo albo creberrime suleato firmato ; fauce lutea ; labio 

 excavato, extrorsum plicato ; columella acuta, sinuata, denticulis 3-4 

 armata. Diam. I ; alt. £ poll. Hab. Tavoy. 



Much like N. lineata, but a little more oblique and less globular ; 

 the girdling threads are less numerous, less in relief, and distantly 

 articulated with white ; color more flesh-like ; grooves on labrum more 

 numerous ; spire a little protruded. 



Nematura ptjncticulata. T. minuta, subrhombea, compressa, 

 solida, nitida, pallide virescens, omnino sub lente puncticulis serialibus 

 insculpta; spira elevata, anfr. 5 convexis, ultimo permagno, versus 

 aperturam valde contracto : apertura parva, dispar, rotundato-ellip- 

 tica, tubuliformis ; labro simplici crasso, continue Long. \ ; diam. 

 i, l poll. Hab. Tavoy. Mrs. Vinton. 



About the size and shape of N. deltas, Benson, but the aperture is 

 much more distorted, there is no approach to an umbilicus, and its 

 punctured surface is sufficiently distinctive. [A. Adams has described 

 a species under the same name, very possibly the same shell. Mag. 

 Nat. Hist. Oct. 1853.] 



Unio generosus. T. magna, solida, transversa, oblongo-ovata, 

 inequilateralis, antice rotundata et angustata ; postice obliquata, sub- 

 rostrata, ad apicem truncata ; margine ventrali arcuata ; m. dorsali 

 recta, adscendente ; umbonibus contiguis haud elcvatis ; valvis sub- 

 tnmidis radiatim substriatis, postice sub-costatis ; epidermide fuligi- 

 nosa, disco nitido ; dentibus remotis, cardinalibus elongatis, obliquis, 

 laminatis ; margarita alba, vel salnionacea, limbo iridescente. 



Long. 31 ; lat. l£ ; alt. 2£ poll. Hab. Newville, Tavoy. Mrs. 

 Vinton. 



The general form, convexity, and color is like that of Marg. Von- 

 denbuschiana, Lea, though the largest specimens are more arcuated at 

 base, and the younger ones are more oblong, like U. complanatus, Lk. 

 The cardinal teeth are like those of U. marginalis, a more cylindrical 

 shell, but they are still more elongated. 



DS^ Vol. ii. 262, (December, 1847.) 



Physa vixosa. T. tenuis, ovato-globosa, badia, spiraliter minu- 

 tissime striata, epidermide tenui induta ; spira obtusa, anfr. 4, ultimo 

 per-magno : apertura ovato-lunata, f longitudinis testa? sequante, 

 hepatica ; columella recta, tenui. Long. | ; lat. i poll. 



Brought by Dr. C. T. Jackson from the Lake Superior region. 



A remarkably inflated species, most like P. ancillaria, Say, but is 

 26 



