MAGILIDAE 219 



Aperture white. Exterior white to Hght-brown. Common in the Puget 

 Sound area and to the north on rocks near shore. Also down to 35 fathoms. 

 Appears in some books as Purpura or Ceratostoina foliatum Martyn. 



Pterorytis nuttalli Conrad Nuttall's Thorn Purpura 



Plate 14 

 Point Conception, Cahfornia, to Lower Cahfornia. 



1/4 to 2 inches in length, similar to Pter. foHata (and somewhat resem- 

 bling Ocenebra poulsom)^ but with much more poorly developed varices, 

 and with one prominent, noduled rib between each varix. Spine on outer lip 

 usually long and sharp. Exterior yellowish brown, sometimes spirally banded. 

 Siphonal canal closed along its length. A common littoral species in the 

 southern part of its range. 



Genus Eupleiira H. and A. Adams 1853 

 Eupleura caiidata Say Thick-lipped Drill 



Figure 47b 

 South of Cape Cod to south half of Florida. 



/4 to I inch in length; apex pointed; siphonal canal moderately long, 

 almost closed, coming to a sharp point below. Last varix large, rounded and 

 with small nodules. Inside of outer lip with about 6 small, bead-like teeth. 

 Whorls with spiral cords and strong axial ribs. Th-^re are 4 to 6 axial ribs 

 between the last 2 varices. E. etterae B. B. Baker is a large, ecologic form of 

 this species. 



Eupleura sulcidentata Dall Sharp-ribbed Drill 



Figure 47c 



West coast of Florida. 



Similar to E. caudata, but with the spiral sculpture almost absent. There 

 are only 2 or 3 axial ribs between the last 2 varices. The varices are thin and 

 sharp, and the entire shell is slightly compressed laterally (has a more oval 

 outline from an apical or top view than does caudata). The axial ribs are 

 often sharp and may bear a small spine at the top. Color gray, chocolate- 

 brown, tan or rarely pinkish, and sometimes with a narrow spiral brown 

 band. Moderately common. E. stimpsoiii Dall from deep water in the Gulf 

 of Mexico is figured on p. 209. 



Family MAGILIDAE 

 Genus Coralliophila H. and A. Adams 1853 



CoralUophila abbreviata Lamarck Short Coral-shell 



Southeast Florida and the West Indies. 



