322 TURBONILLA. 



Genus TURBONILLA, Risso, 1826. 

 I. European and West African Bpeciea. 

 Typical. 

 T. LACTEA, Linn. PL 74, fig. 57 ; PI. 75, fig. 77. 



White, rather solid, opaque, glossy, sti'ongly longitudinally 

 ribbed, ribs terminating below the periphery of the last whorl ; 

 whorls 12, moderately enlarging, slight!}' convex; columella 

 usually without fold. Length, 85 mill. 



Europe. 

 It is T. elegantissima, Macg. ; T. acuta^ Donovan; T. alba., 

 Peiin. ; T. plicatula., Risso ; T. turritella, Scacchi, and T. gra- 

 *cilis, Desh. 



Yar. Campanell^. Phil. Fig. 77. 



Whorls more flattened, costre more oblique. 



Sicibj. 

 T. elegantissirna, var. similis, Monts., is a synonym. 



T. siNUOSA, JeflTreys. PI. 75, fig. 84. 



Rather thin, semitransparent, glossy, closely longitudinally 



flexuousl}^ ribbed, ribs fading out at the periphery of last whorl, 



white ; whorls 8, flattened ; columellar tooth slight but distinct. 



Length, 4-3 mill. 



Mediterranean .1 W. Coast of Africa. 



T. ACUTicosTATA, Jeffreys. PI. 75, fig. 85. 



Rather thick, opaque, glossy, with longitudinal ribs and wider 

 interspaces, ribs terminated at the periphery of the last whorl 

 b}' a spiral, thread-like line ; whorls 9, rather convex ; columella 

 without tooth. Length, 3 mill. 



Blediterranean Sea. 

 T. MAGNiFiCA, Seguenza. PI. 75, fig. 96. 



White or pinkish white, often beautifully iridescent ; whorls 

 11-12, somewhat flattened, rounded at the impressed suture, 

 lonoitudiually ribbed, ribs curved, low and rounded ; columella 

 not dentate. Length, 12 mill. 



New England, Azores, Bay of Biscay. 



First described as a Sicilian tertiary fossil, but found living 

 by the " Travaillieur " and " Talisman " expeditions. Mr. Ver- 



