1899.] NATURAL SCIENCES OF PHILADELPHIA. 153 



is SO worn aud encrusled that other spiral sculpture, if present, can- 

 not be determined. Under the microscope the whorls are seen to be 

 well-lapped with a rounded undulating edge turning well out at 

 the deep suture. The aperture is broken. 



Two other specimens (No. 72,048), also of the R. Swift collec- 

 tion, were labelled T. flavocinda C, B. Adams, but the figure given 

 in Tryon's Manual, as made from a specimen, does not represent 

 either of them. These differ in some respects from the above 

 example, but agree Avith others found at Bermuda by Prof. A. E. 

 Verrill and party in 1898. Among these, Avhich number over 40, 

 there is considerable variation. The nucleus is usually but little 

 raised, but sometimes is quite prominent and oblique; the number 

 of lines on the base varies from 7-10, with finer ones beloiv; the 

 number of ribs varies from 22-26, sometimes 30 or more when 

 the specimen has been injured; they are usually straight, some- 

 times slightly curved, usually perpendicular, sometimes oblique. 

 Some specimens have on the upper portion of the intercostal 

 spaces, two well-separated, inconspicuous grooves, and on fresh 

 examples which are yellow-white, semitransparent and lustrous 

 with bands of waxen color at the sutures and on the periphery of 

 the body-Avhorl exceedingly fine strise appear under the micro- 

 scope. The aperture is ovate, lustrous within, Avheu fresh, with 

 continuous peritreme, the inner-lip i-epresented by a thin layer of 

 enamel having a delicate free edge. The shell increases regularly 

 in diameter to the 6th or 7th whorl, and beyond the increase is 

 more gradual. 



Length of a 7-whorled specimen, 3i mm. ; diameter, 1 mm. ; 

 length of aperture, about 1 mm. 



A worn dead specimen dredged by the "Challenger" in 390 

 fathoms off Culebra, W. I., was described and figured by Watson 

 as Odostomia phrikalea. It agi-ees so closely with the above ex- 

 amples that there is little doubt of its being the same species. 

 Turbonilla pupoides variety ischna, new. 



Four specimens (No. 79,014) difTer from the typical form, in 

 being much more slender. After the 4th or 5th whorl the increase 

 in diameter is so gradual that the sides of the spire appear nearly 

 parallel. Specimens 4 mm. in length, being of the same diame- 

 ter as others of but about half that length. Over a dozen of this 

 form were among the Bermuda specimens. 



