1899.] NATURAL SCIENCES OF PHILADELPHIA. 159 



Turbonilla sp. ? 



Another young, imperfect specimen (No. 79,007) from the same 

 locality has only the 6 lower whorls, the last one crossed by about 

 20 transverse ribs which are rounded, straight, and perpendicular, 

 separated by about equally wide, shallow spaces which are cut by 

 about 6 unequal, incised, spiral lines which increase to 10 under 

 the microscope. Base av ell rounded, cut by about 10 fine, incised, 

 unevenly spaced, spiral Hues. Aperture elongated; inner-lip 

 straight, thin and reflected. 



Length, 41- mm. ; diameter, 1^ mm. ; length of aperture, about 

 1 mm. 



'Turbonilla Conradi, new specie?. Plate VIII, fig. 10. 



Shell large, regularly coiled, stout, dirty waxen gray, ornamented 

 Avith coarse and fine, iucised, spiral lines on the intercostal spaces 

 and base. Whorls 12, shghtly convex, below the prominent, 

 nearly flattened nucleus, transverse to the axis. Suture well 

 marked, slightly undulating. Transverse ribs, about 22, broad, 

 rounded, straight, slightly oblique, separated by wider, shallow 

 spaces crossed by 4 conspicuous, iucised lines, and several indistinct, 

 finer ones. One just above the suture forms a wide and deep 

 groove, another similar one at the middle of the whorls, on either 

 side and well separated from this, a distinct line, the three forming 

 a conspicuous band; above and below this there are other indistinct 

 lines which, under the microscope, number 6 on each space; 2 

 others also appear on each side of the median groove. Base well- 

 rounded, cut by 3 distinct, well-separated, incised, spiral lines and 

 several finer ones below. Aperture squarish, well-rounded; pillar- 

 lip straight, thickened, well reflected. 



Length, 8^ mm. ; diameter, about 2 mm. ; length of aperture, 

 1^ mm. 



One specimen (No. 72,052) was found by Conrad at Tampa 

 Bay, Fla. 



An undesciibed species found ofi* Cape Hatteras, N. C, has a 

 band of three unequal incised lines on the middle of the whorls, 

 but in other characters it is quite unlike. The T. viridaria Dall 

 also bears a superficial resemblance to it, but when placed side by 

 side the two are found to be verv different. 



