1899.] NATURAL SCIE^X'ES OF PHILADELPHIA. 163 



mens. A number of specimens found in from 1-10 feet water 

 at Bermuda by Prof. A. E. Verrill and party, 1898, differ from 

 the above only in having the fine lines also on the base. 



An example with the animal consists of 10 flat whorls below the 

 prominent, slightly oblique, flattened nucleus. Opaque white with 

 little lustre, rather stout, regularly coiled. Suture distinct. Trans- 

 verse ribs 30, narrow, rounded, perpendicular, with wider, deep 

 interspaces cut by numerous, crowded, incised, spiral lines separated 

 by fine, nearly uniform, raised threads, and two very wide and 

 deep grooves, one at the suture and one above the periphery of 

 the whorls, between which, under the microscope, the incised lines 

 number about 26, and between the upper one and the suture about 

 16, Numerous, crowded, incised, spiral lines entirely cover the 

 slightly rounded base, but the spaces between them are wider and 

 flat, rendered wavy by conspicuous, irregular lines of growth. 

 Aperture elongated; pillar-lip but little thickened, straight and 

 slightly reflected. 



Length, 6imm. ; diameter, limm. ; length of aperture, limm. 



Fragments (No. 79,016) without locality Avere found with the 

 following species. 



Another specimen from Bermuda differs in being much stouter, 

 with 9 shorter whorls with somewhat angular body-whorl, and hav- 

 ing only 24 transverse ribs, and but 20 incised lines between the 

 grooves on the interspaces. In specimens which have been injured, 

 the number of ribs is over 40. 



The T. punicea Dall is a related species, and was dredged in 

 considerable numbers in shallow Avater off" Cape Hatteras, N. C, 

 by the U. S. Fish Commission in 1883-1884. It is a small, slen- 

 der species, with rounded base cut by several (about 7) fine, irreg- 

 ularly arranged, incised, spiral lines. The transverse ribs are little 

 prominent Avith their interspaces cut by tAvo distinct shalloAV 

 grooves, one sutural and the other a little Avider, peripheral, 

 between Avhich are fine, incised, unequally separated, spiral lines 

 Avhieh vary in number from 4-7 above and beloAV the middle 

 groove ; their distinctness and arrangement very inconstant. There 

 is also a variety having still more numerous, finer and more regu- 

 larly arranged lines, 8 beloAA' and 8-13 above the peripheral grooA^e. 

 An example loaned me by Dr. Dall is of a dull waxen color, 

 changing to pinkish broAvn on the last Avhorl and has tAvelve, some- 



