6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. QI 



ribs and in the intercostal spaces. The body of the whorls is marked 

 by fine spiral lirations, while the columella has strong spiral cords. 

 The present genus suggests Symatosyrinx Dall, the type of which is 

 Pleurotonia lunata Lea, which comes from the Yorktown Miocene at 

 Petersburg, Va. It differs from it in having the nuclear whorls well 

 rounded instead of carinated, the columella strongly lirate, the basal 

 fasciole less pronounced, and in being smaller in every way. 



DOUGLASSIA ENAE, n. sp. 

 Plate 2, figs. 1-3 



Shell elongate-conic, wax-yellow with a broad pale-brown band at 

 the periphery. Nuclear whorls 2.5, smooth, forming a pointed apex. 

 The beginning of the postnuclear whorls has the axial riblets char- 

 acteristic of the later postnuclear whorls, but here they are a little 

 more slender and a little more closely approximated. The postnuclear 

 whorls are marked by strong axial ribs that almost form cusps at 

 the anterior termination of the posterior sinal region; they extend 

 only very feebly across the sinal area, which occupies the posterior 

 two fifths of the turns. On the last whorl these ribs are decidedly en- 

 feebled on the base and evanesce at the junction with the columella. 

 Of the axial ribs, 10 occur upon the first six whorls, 12 upon the 

 seventh and the last turn. These ribs are about one third as wide as 

 the spaces that separate them, the latter being broad and concave. 

 In addition to the axial ribs the whorls are marked by rather strong 

 incremental lines that have a decidedly sigmoid curve, being retrac- 

 tively slanting at the posterior sinal region and protractively anterior 

 to this. The spiral sculpture consists of numerous, closely spaced, 

 microscopic obsolete spiral lines. Base moderately well rounded. Col- 

 umella short and stubby, marked by 12 rather strong sinuous spiral 

 threads and finer spiral lines corresponding to those on the spire and 

 base. Aperture moderately large and rather broad, decidedly chan- 

 neled posteriorly and anteriorly with a feeble stromboid notch. The 

 outer lip is protracted between the posterior angle and the stromboid 

 notch into a clawlike element, while the inner lip is reflected over 

 the columella as a heavy callus, which extends over the parietal wall 

 and projects into the aperture at the posterior sinus as a decided 

 knob. There is a heavy varix about one sixth of a turn behind the 

 edge of the outer lip. 



Type. — U.S.N.M. no. 430289, dredged at station 26 in 33 to 40 

 fathoms between latitude i8°3o'2o" N., longitude 66°22'o5" W. and 

 latitude i8°3o'3o" N.. longitude 66''23'o5" W. It has 6.5 whorls 



I 



