354 RISSOIA. 



R. FULGIDA, Adams. PL 69, fig. 33. 



Scarcely rimate, rather thin, semipellucid, smooth, light yellowish, 

 bifasciate with chestnut, penultimate whorl sometimes chestnut 

 color ; whorls 4, tumid, with deep suture. Length, 7 mill. 



Europe. 



It is E. pygmaea, Mich. Jeffreys has indicated a var. pallida. 

 R. FUSCA, Phil. PL 69, fig. 34. 



Scarcely rimate, smooth, brownish, apex obtuse ; whorls 4-4^, 

 convex. Length, 1 mill. 



Sicily. 



jR. inflata and R. turriculata, Monts., jR. paludinoides, Calcara, 

 are synonyms. 

 R. ALLERYANA, Arad. et Benoit. PL 69, fig. 35. 



Scarcely umbilicated, thin, very smooth, pellucid, white ; whorls 

 4, very convex, with deep suture ; lip continuous, simple. 



Length, 1 mill. 



i Sicily. 



R. ambigua, Brugn., and var. solidula, Monts., are synonyms. 

 R. SCIUTIANA, Arad. et Benoit. PL 69, fig. 36. 



Shell imperforate, smooth, vitreous, shining, yellowish chestnut, 

 spire obtuse ; whorls 5, convex, suture moderately impressed. 



Length. ? 



Sicily. 



R. zancleana, Arad. (in tavola) is a synonym. 

 R. MICROMETRICA, Seguenza. PL 69, fig. 39. 



Thin, smooth, subtransparent, yellowish, with three or four 

 chestnut bands, suture deep ; whorls 4, convex, the last subinflated, 

 base narrowly rimate. Length, 1*25 mill. 



Mediterranean Sea. 

 R. MARINE, Tenison Woods. PL 71, fig. 9. 



Scarcely rimate, thin, translucent, smoky horn-colored, two- 

 banded with yellow, polished ; whorls 4, ventricose, sloping. 



Length, 2'5 mill. 



Tasmania. 

 R. ATKINSONI, Tenison Woods. PL 71, fig. 10. 



Imperforate, but channeled, polished, translucent, pale horn color, 

 obscurely bifasciate with dusky brown, columella black ; normal 

 whorls 5, well rounded ; aperture produced below, lip thin, acute, 

 columellar lip reflected into a false umbilicus. Length, 1 mill. 



Tasmania. 



