— 409 — 



paululum translucida, unicolor, albida; spira sat elon- 

 (jata; sutura profunde impressa ; anfr. 7 1/2-8 sexvari- 

 cosi, prinii suhangulati, vix aut non spinosi^ mitepennlti- 

 mus et jjenultimus varicibus in spinas longiusculas , 

 excavatas desinentibus instructif costis 2 validis spiraliter 

 muniti, ultimus spiram superans (r : 22 : 14), transversim 

 costis 5 validis minutissime squamosiSj versus marginem 

 externum in spinas totidem desinentibus et costulis mino- 

 ribus, in inlerstitiis sitis, separatis impressus^ et spinis 

 quinqueseriatim dispositis et varicibus correspondentibus 

 ornatus, série prima spinarum subincurva, majore, e Costa 

 suturœ magis vicina oriunda; apertura ovata, parva, 

 subintegra, intus lœvigata, alba, in canalem longiusculum, 

 fere clausum, subrecurvum, utrinque satbreviter spinosu- 

 luni desinens ; perist. alhidum, subcontinuum, margine 

 columellari lœvigato, subarcuato, leviter prominulo^ ex- 

 terno ad limbum subundoso, mox extus, occursu varicis. 

 in alam aperturœ latitudinem superantem, et in intersti- 

 tiis spinarum lineis undosis elegantissime sculptam pro- 

 ducto. — Loîig. 36, diam. maj. [cum spinis) 27 7nill. — 

 Apert. 8 mill. longa, 5 1/2 lata (coll. Paz). 



Habitat in fundis coralligenis maris Antillarum 

 (P. M. Paz). 



2. Nassa (Desmotjlea) Tryoni. 



T. subovata, solida, crassa, ventricosa, striis numero- 

 sis, œqualibus undique spiraliter impressa, roseo-albida, 

 castaneo late marmorata ; spira mediocriter elevata, 

 apice déficiente ; sutura valde impressa; anfr. circiter 

 6-7 convexiusculi, primi roseo-violacei, penultimus et ul- 

 timus roseo-albidi, castaneo late et irregulariter marmo- 

 rati, ad suturam maculis saturatioribus , subdistantibus 



