340 RISSOIA. 



R. Frauenfeldi, Schwartz. PL 68, fig 86. 



Thick, subpellucid, chestnut color, smooth towards the apex, be- 

 low with 18-20 somewhat oblique longitudinal plicse; whorls 6i, 

 somewhat convex, with impressed suture ; jDeristome thick, contin- 

 uous, duplicate ?. Length, 3*2 mill. 



Sydney, Australia. 



Unfigured Sjyecies. 

 R. LACUNATA, R. iNCLusA, Carp. California. 



R. OBESA, R. PUPOiDES, H. Ad. Lord Hood's Isl. 



R. Pelly^, Nevill. Adelaide, So. Australia. 



Section Nodulus, Monts. 1878. 



R. CONTORTA, Jeffreys. PI. 69, figs. 40-42. 



Narrowly umbilicated, somewhat solid, shortly cylindrical with 

 obtuse apex, yellowish or white, with two fulvous bands, smooth, 

 shining ; whorls 4, ventricose, with deep suture ; aperture subro- 

 tund, subeffuse, peristome continuous. Length, 1'2 mill. 



Mediterranean Sea. 

 Var. elata, B. D. D. Fig. 41. 



Spire lengthened. 



Var. INTORTA, Monts. Fig. 42. 



Spire shorter, very smooth, last whorl more solute. 



R. NiTiDA, Brusina. PI. 69, figs. 43, 44. 



Rather solid, white, vitreous, transparent, apex obtuse ; whorls 

 6, slightly convex, smooth, suture not deep ; lip continuous, slightly 

 varicose, a little produced below. Length, 2'25 mill. 



Mediterranean Sea. 



It is R. glabrata, var. nitida, Brusina. 



R. GLABRATA, Miihlf PI. 69, figs. 45, 46. 



Pupiform, rather solid, opaque, smooth, fulvous brown ; Avhorls 6, 

 somewhat convex, the last narrower than the preceding whorl, su- 

 ture not deep ; peristome thick, continuous, patulous at the base. 



Length, 1*5 mill. ' 



Mediterranean Sea, Madeira. 



R. panctidum, Phil., R. Mandralisci, Aradas, and R. sabidum, 

 Cantraiue (fig. 46), are considered synonyms. 



