322 TURBONILLA. 



Genus TURBONILLA, Kisso, 1826. 

 I. European and West African Species. 



Typical. 

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



White, rather solid, opaque, glossy, strongly longitudinally 

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

 whorls 12, moderately enlarging, slightly convex; columella 

 usually without fold. Length, 8 - 5 mill. 



Europe. 



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

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

 cilis, Desh. 



Yar. CAMPANELL^S, Phil. Fig. 77. 



Whorls more flattened, costue more oblique. 



Sicily. 

 T. elegantissima, var. similis, Monts., is a sj'iionym. 



T. SINUOSA, Jeffreys. PL 75, fig. 84. 



Rather thin, semitransparent, glossy, closely longitudinally 

 flexuousty ribbed, ribs fading out at the periphery of last whorl, 

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



Length, 4-3 mill. 



Mediterranean, W. Coast of Africa. 



T. ACUTICOSTATA, Jeffreys. PL 75, fig. 85. 



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

 interspaces, ribs terminated at the periphery of the last whorl 

 by a spiral, thread-like line; whorls 9, rather convex; columella 

 without tooth. Length. 3 mill. 



Mediterranean Sea. 

 T. MAGNIFICA, Seguenza. PL 75, fig. 96. 



White or pinkish white, often beautifully iridescent ; whorls 

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

 longitudinally 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. Yer- 



