RI880INA, 371 



R. MONiLis, A. Ad. PL 55, fig. 23. 



Solid, light fulvous, with a sutural row of nodules, and close, 

 narrow, longitudinal plications, the interstices spirally punctate- 

 striate; whorls 7, flattened; varix striate. Length, 4"9 mill. 



Philippines. 

 R. Krebsi, Morch. PI. 54, fig. 7. 



Semipellucid, white, with about 28 thin, subsinuous, longitudinal 

 riblets, cut into a row of tubercles just below tlie suture, decussated 

 by spiral, close stride; whorls 7, convex, with slightly impressed 

 suture; lip varicose. Length, 3"5 mill. 



Cuba, Jamaica. 



Schwartz has described and figured this as R. multicostata, Ads. 



R. MicANs, A. Ad. PI. 55, fig. 28. 



Rather solid, white, shining, subdistantly, elevately plicate, inter- 

 stices s})irally striate, last whorl sulcate below; whorls 9, convex ; 

 lip varicose. Length, 4'7 mill. 



Philippines. 

 R. FORTis, C. B. Ad. PL 00, fig. 25. 



White, with 22 rather strong, rounded, neai'ly straight, longitu- 

 dinal ribs; whorls 10, somewhat turreted, flattened, with crenulated, 

 rather deep suture ; lip strongly varicose. Length, 7'4 mill. 



Panama to Cape St. Lucas. 

 R. sTRicTA, Menke. PL 55, fig. 26. 



White, densely, smoothly longitudinally costate, the interstices 

 obsoletely spirally striate; whorls 7, flattened. Length, 7 mill. 



3Iazatlan. 



Very closely allied to the preceding species, if not identical with 

 it. 



R. AMBiGUA, Gould. PL 55, figs. 31, 27, 29, 35; PL 54, fig. 7. 



Whitish, with about 20 narrow^, small, longitudinal plications, 

 often becoming faint on the last whorl, closely spirally striate; 

 whorls about 10, flatly convex, with impressed suture ; lij) varicose. 



Length, 7'3 mill. 



Aden, Ceylon, Singapore, Paumotus, Sandwich Isl., Mauritius, 

 Viii Is., etc. 



It is R. pusilla, Schwartz, not Brocchi (fig. 27), R. cincta, Dunker, 

 R. myosoroides, Recluz (tig. 29), R. striolata, Dunker, R. multicos- 

 tata, Garrett (tig. 9) R. costulifera. Pease, R. subcondnna, Souverb. 

 (tig. 35) and y&r. perj^usilla, Nevill. 



