VOLUTIDAE 251 



Subgenus Aurinia H. and A. Adams 1853 

 Scaphella dohrni Sowerby Dohrn's Volute 



Plate 13) 



Off the south half of Florida. 



3 to 4 inches in length, similar to junonia, but much lighter in weight, 

 much more slender, with a higher spire and with numerous exceedingly fine, 

 incised (cut) spiral lines. Some specimens have the early whorls slightly 

 angled and with short axial ribs. This is the form named florida Clench and 

 Aguayo and is probably not a good species. A rare species which is appear- 

 ing in private collections more and more. 



Scaphella dubia Broderip Dubious Volute 



Off south half of Florida and the Gulf of Mexico. 



4 inches in length, similar to dohrni, but more slender, with fewer spots, 

 and with 6 to 7, instead of 9 to 10, rows of spots. A rare and exquisite spe- 

 cies from moderately deep water. 



Scaphella schmitti Bartsch Schmitt's Volute 



Plate 136 



Off Tortugas, Florida. 



5 inches in length. Under the brownish periostracum the shell is chalky, 

 pale salmon and with 4 or 5 spiral rows of weak, brown, square spots. A 

 thick, yellowish-gray glaze overlays the periostracum on the parietal side of 

 the body whorl. Columella straight, while in R. georgiajia Clench from 

 Georgia to east Florida it is arched. Both quite rare, the former in 80 fathoms 

 of water. The genus Rehderia Clench 1946 was unfortunately erected upon 

 an ecological or pathological character and should be considered a synonym 

 of Scaphella. 



Genus Arctoinelon Dall 191 5 

 (Boreomelon Dall 191 8) 



Arcto7nelon stearnsi Dall Stearns' Volute 



Alaska. 



4 to 5 inches in length, strong; exterior chalky-gray with mauve-brown 

 undertones. Aperture semi-glossy, light-brown. Columella brownish with 2 

 moderately large folds and a weak one below. Nucleus bulbous, chalky- 

 white. Uncommon offshore down to 100 fathoms. 



