18 NEW-YORK FAUNA — MOLLUSCA. 



Diaphana pellucida of Brown (Conchology of Great Britain, pi. 38, fig. 10, 11). It bears 

 a resemblance in its contour to the B.fontindlis of Say, which we are inclined to suspect to 

 be a Physa. 



Bulla hiemalis. 



PLATE XXXV. FIG. 335. 



Bulla hyemalit. Cocthouy, Bost. Jour. Nat. Hist. Vol. 2, p. 180, pi. 4, fig. 5. 

 B. id. Gould, Invertebrata of Mass. p. 163, fig. 100. 



Description. Shell globular, minute, very thin and brittle. The body-whorl enveloping all 

 the others so as to leave no perceptible spire, and marked with the lines of growth. Aperture 

 narrow above, dilated beneath. Outer lip strong, and regularly curved : it revolves from its 

 junction behind, nearly a third of a revolution, before it turns forward. Columella slightly 

 arcuated, and reflected upon the body of the shell, so as to form a small but distinct umbili- 

 cus. 



Color. Hyaline, with a brownish tinge, except near the tip, where it is whitish. 



Length, • 1 ; diameter, ' 1 . 



Stomachs of codfishes on the coast of Massachusetts. 



Bulla oryza. 

 plate xxxv. fig. 327. 



Bulla oryza. Totten, Am. Jour. Sc. and Arts; Vol. 28, p. 350, fig. 5. 

 B. id. Gould, Invertebrata of Massachusetts, p. 168, fig. 93. 



Description. Shell minute, not very thin, regularly diminishing from the middle towards 

 each end ; the tip being depressed into a shallow pit, and the base rather acute. Surface 

 marked with numerous minute lines of growth, and with a number of impressed revolving 

 lines on the lower portion, and a few more obscure ones near the shoulder : none of them 

 perceptible without a magnifier. Aperture as long as the shell, narrow above, and widening 

 gradually downwards. Outer lip sharp, simple, regularly arched, rising above a little higher 

 than the shoulder. Left margin thickened below into a stout, smooth and glossy pillar, which 

 is twisted so as to form an oblique fold : it terminates abruptly beneath, truncated. No um- 

 bilicus either at the tip or the base. 



Length, 0*3 ; diameter, 0*1. 



Found originally by Col. Totten in muddy bottoms at Newport, and since in New-Bedford 

 harbor. It has not yet been noticed north of Cape Cod, but will probably be discovered on 

 our coast. 



